Page 1 COMSPHERE 392xP MODEMS MODELS 3920P AND 3921P TECHNICAL REFERENCE MANUAL Document No. 3920-A2-GH30-41 February 2002...
Page 2: Comsphere 392Xplus Modems
Paradyne Corporation makes no representation or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose. Further, Paradyne Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of Paradyne Corporation to notify any person of such revision or changes.
Page 3: Important Safety Instructions
Safety Instructions Important Safety Instructions Read and follow all warning notices and instructions marked on the product or included in the manual. Some models are provided with a three-wire grounding type plug – a plug which has a grounding pin. This is a safety feature. Equipment grounding is vital to ensure safe operation. Do not defeat the purpose of the grounding type plug by modifying the plug or using an adapter.
Page 4 INTERFERENCE AT HIS OWN EXPENSE. THE AUTHORITY TO OPERATE THIS EQUIPMENT IS CONDITIONED BY THE REQUIREMENTS THAT NO MODIFICATIONS WILL BE MADE TO THE EQUIPMENT UNLESS THE CHANGES OR MODIFICATIONS ARE EXPRESSLY APPROVED BY PARADYNE. WARNING TO USERS OF DIGITAL APPARATUS IN CANADA: THIS CLASS [A] DIGITAL APPARATUS MEETS ALL REQUIREMENTS OF THE CANADIAN INTERFACE-CAUSING EQUIPMENT REGULATIONS.
Page 5: Table Of Contents
Table of Contents Preface Objectives and Reader Assumptions ......How to Use This Manual ........Related Documents .
Page 6 COMSPHERE 392xPlus Modems 4. Status Branch Status Branch ......... . . 5.
Page 7 Table of Contents 14. AT Command Set and S-Registers Overview ..........14-1 Command and Data Modes .
Page 8 COMSPHERE 392xPlus Modems List of Figures Figure Page 3920-A2 Standalone Modem ......... . . 3920-A1 Standalone Singleport and Multiport Modems .
Page 9 Table of Contents List of Tables Table Page 392xPlus Operational Modes ......... . . Technical Specifications for 392xPlus Modems .
Page 10 COMSPHERE 392xPlus Modems Table Page Modem Health ............Leased-Line Operation .
Page 11: Preface
Preface Objectives and Reader Assumptions This manual describes how to install and operate the COMSPHERE Model 3920Plus standalone and Model 3921Plus carrier-mounted modems. Users of this manual must have a basic understanding of modems and their operation. How to Use This Manual Chapter 1 provides technical specifications, information about the four 392xPlus models, the modem features, and the government requirements for using these modems.
Page 12: Related Documents
3920-A2-GK47 COMSPHERE 392xPlus Modems, Model Number 3920-A2-411, Installation Instructions Contact your sales or service representative to order additional product documentation. Paradyne documents are also available on the World Wide Web at: http://www.paradyne.com Select Service & Support Technical Manuals viii October 1998...
Page 13: Introduction
Introduction Overview ........... . COMSPHERE 392xPlus Models .
Page 14: Comsphere 392Xplus Models
COMSPHERE 392xPlus Modems COMSPHERE 392xPlus Models The COMSPHERE 392xPlus modem is available in the following models: • Model 3920Plus standalone singleport modem (model no. 3920-A1-xxx and 3920-A2-xxx). • Model 3920Plus standalone multiport modem (model no. 3920-A1-40x). • Model 3921Plus carrier-mounted singleport modem (model no. 3921-B1-01x). •...
Page 15 Chapter Title Model 3920Plus Standalone Multiport Modem The Model 3920Plus multiport is a standalone modem (Figure 1-2), with an integral time division multiplexer (TDM) and a modem sharing device (MSD) as standard equipment. The TDM provides time division multiplexing of up to four independent ports over point-to-point lines using the V.34 family or V.32 family modulation.
Page 16: Model 3921Plus Singleport Carrier-Mounted Modem
COMSPHERE 392xPlus Modems Model 3921Plus Singleport Carrier-Mounted Modem The Model 3921Plus singleport is a carrier-mounted modem (Figure 1-3) capable of either 4-wire/2-wire leased-line or dial operation. The modem installs into a COMSPHERE 3000 Series Carrier, occupying a single slot. The modem’s faceplate has sixteen (16) LED status indicators for displaying modem activity and an audio speaker jack for the carrier’s optional speaker.
Page 17: Model 3921Plus Multiport Carrier-Mounted Modem
Introduction Model 3921Plus Multiport Carrier-Mounted Modem The Model 3921Plus multiport is a carrier-mounted modem (Figure 1-4) equipped with an integral time division multiplexer (TDM) with a modem sharing device (MSD). The modem installs into the COMSPHERE 3000 Series Carrier, occupying two slots. The modem’s faceplate covers two slots in the carrier.
Page 18: 392Xplus Operational Modes
COMSPHERE 392xPlus Modems 392xPlus Operational Modes The 392xPlus operational modes determine how your modem performs in various applications. These operational modes are determined by your modem model and the selected configuration options. There are two operational modes: • Singleport. Operates on both the singleport and multiport modem models. The Singleport mode only supports one port (DTE 1).
Page 19: 392Xplus Modem Features
• International Support to correctly detect the call progress signals (dial tone, busy, fast busy, ringback) for a variety of countries. • Channel adaptive Trellis-Coded Modulation – Paradyne’s advanced Trellis-Coded transparent forward error correction for Trellis multipoint and high-speed point-to-point applications.
Page 20: Applications
COMSPHERE 392xPlus Modems Applications Multipoint Multipoint is available in all 392xPlus modem models. It utilizes leased-line circuits for time sharing the same front-end processor (FEP) port with multiple remote locations. The FEP (via the control modem) regulates traffic on the line by continuously polling the tributary DTE(s) in a predefined sequence.
Page 21: V.34 Modulation
Introduction When the Digital Bridging feature is enabled, a new menu is present with the following conditions: • TDM capability is disabled when DTE Bridge configuration option is set to Enable, therefore the rate of Port 1 is forced to run at the line rate. •...
Page 22: Government Requirements And Equipment Return
COMSPHERE 392xPlus Modems NOTE When a 2400 V.34 modulation connection occurs on one end of a modem pair with configuration options set for Asymmetric rates, the other modem is 24K due to the 2400 symbol rate it uses. Multiport Backup When the 392xPlus multiport modem has the MUX Mode configuration option set to either TDM/MSD or DTE Bridge, it is in Multiport mode, and either dial lines or a 2-wire leased line can be used to back up the primary 4-wire leased line.
Page 23 • Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com • Via Telephone: Call our automated call system to receive current information via fax or to speak with a company representative.
Page 24: Canada
COMSPHERE 392xPlus Modems Canada NOTICE TO USERS OF THE CANADIAN PUBLIC SWITCHED TELEPHONE NETWORK The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational, and safety requirements. The Department does not guarantee the equipment will operate to the user’s satisfaction.
Page 25: Technical Specifications
Introduction Technical Specifications Table 1-2 shows the technical specifications for the 392xPlus modems. Table 1-2 (1 of 2) Technical Specifications for 392xPlus Modems Specifications Description APPROVALS Model 3920Plus, 3921Plus, and Refer to the product labeling or contact your service representative. COMSPHERE 3000 Series Carrier ENVIRONMENT Operating Temperature...
Page 26 16,800, 14,400, 12,000, 9600, 7200, 4800, 2400 bps) Paradyne V.32terbo (19,200, 16,800 bps) ITU-T V.32bis (14,400, 12,000, 9600, 7200, 4800 bps) ITU-T V.32 (9600, 4800 bps) Paradyne Trellis Multipoint (19,200, 14,400, 9600, 7200, 4800, 2400 bps) ITU-T V.22bis (2400 bps) ITU-T V.27bis (4800, 2400 bps) ITU-T V.33 (14,400, 12,000 bps)
Page 27: Modem Installation
Modem Installation Overview ........... . 392xPlus Modem Package .
Page 28: Customer-Supplied Equipment
COMSPHERE 392xPlus Modems For the carrier-mounted models • Installation instructions • Model 3921Plus modem • One (singleport) connector plate or two (multiport) connector plates with two DB-25-S edge card connectors on each plate If any hardware components are damaged, notify your service representative. Return equipment using the procedures described in the Government Requirements and Equipment Return section of...
Page 29: Model 3920Plus Modem Installation
Modem Installation Model 3920Plus Modem Installation Before installing your standalone modem, make sure your installation site is clean and well-ventilated. Allow space around the modem for installing cables and telephone cords, and make sure the modem is located within reach of the ac power outlet. The distance between your modem and DTE should be minimized if DTE data rates exceed 19,200 bps.
Page 30 COMSPHERE 392xPlus Modems DIAL LEASED DTE 1 LEASED-LINE DATA NETWORK TERMINAL 8-POSITION EQUIPMENT PLUG DB-25-P CONNECTOR SUB-MINIATURE DIAL NETWORK 4-POSITION 6-POSITION PLUG PLUG FOR POWER HUBBING NETWORK SUPPLY DEVICE MANAGEMENT SYSTEM OPERATION 98-14677-03 Figure 2-1. Model 3920Plus Singleport (3920-A2-xxx) Back Panel and Power Supply October 1998 3920-A2-GH30-40...
Page 31 Modem Installation DB-25-S CONNECTORS DTE 2 DTE 3 DTE 4 LEASED DIAL DTE 1 ON OFF LEASED-LINE NETWORK 8-POSITION, DATA 8-CONDUCTOR TERMINAL PLUG EQUIPMENT DB-25-P CONNECTOR DIAL NETWORK NETWORK MANAGEMENT 6-POSITION, SYSTEM 4-CONDUCTOR POWER SUB-MINIATURE, PLUG SUPPLY 4-POSITION, 4-CONDUCTOR LEASED BACKUP PLUG 8-POSITION, 8-CONDUCTOR...
Page 32: Data Terminal Equipment Connection
COMSPHERE 392xPlus Modems Data Terminal Equipment Connection Use the following steps to connect an EIA-232-D cable from the modem to a DTE: 1. Make sure the modem is powered OFF. 2. Connect the DB-25-P (plug) connector on the cable to the first or only DB-25-S (socket) connector (Figure 2-1 or 2-2) on the modem’s back panel, labeled DTE 1.
Page 33: Leased-Line Network Connection
Modem Installation Leased-Line Network Connection Use the following steps to connect the leased-line network interface: 1. Insert the 8-position, 8-conductor modular plug into the jack labeled LEASED (Figure 2-1 or 2-2). 2. Insert the other end of the modular cord into the leased-line network interface. 3.
Page 34: Removing And Replacing The Model 3920Plus Modem
COMSPHERE 392xPlus Modems Removing and Replacing the Model 3920Plus Modem To remove and replace the Model 3920Plus modem, perform the following steps: 1. Make sure the modem is offline. Press the modem’s back panel power switch to OFF. 2. Disconnect the power cord from the ac power outlet. 3.
Page 35 Modem Installation MULTIPORT SINGLEPORT BACK BACK CONNECTOR PLATE CONNECTOR PLATES EIA232/V.24 CONNECTOR PORT 3 PORT 1 GROUNDING PORT 4 PORT 2 FUTURE USE 495-14696-01 Figure 2-3. Model 3921Plus Back Connector Plates 2. At the front of the carrier, hold the modem vertically, with the latch on its faceplate in the open position, and insert it into the top and bottom card guides of one of the slots numbered 1–15 (Figure...
Page 36 COMSPHERE 392xPlus Modems 3000 SERIES CARRIER MODEL 3921Plus SINGLEPORT MODEM LATCH CIRCUIT CARD GUIDES 3000 SERIES CARRIER MODEL 3921Plus MULTIPORT MODEM LATCH CIRCUIT CARD GUIDES 495-14708 Figure 2-4. Installing the Model 3921Plus Modem 2-10 October 1998 3920-A2-GH30-40...
Page 37 Modem Installation If the Model 3921Plus modem is to communicate with an installed SDCP, install the modem as described above and perform the following steps: 1. Press the key on the SDCP. The Carr:Slot screen appears with the cursor on the Select slot selection position (01 on the first LCD line in following screen example).
Page 38 COMSPHERE 392xPlus Modems 6. When the modem is installed properly and the power-up self-test completes, rotate the circuit pack lock until it covers the faceplate latch (Figure 2-5). Tighten the retention screw on the circuit pack lock. This prevents the modem from accidently being removed once it is installed in a carrier.
Page 39: Removing The Model 3921Plus Modem
Modem Installation Removing the Model 3921Plus Modem CAUTION When removing the Model 3921Plus modem from the carrier, always use a ground strap when handling the modem. Always store the Model 3921Plus modems in an antistatic bag when it is removed from the carrier. It is not necessary to power down the carrier to remove the Model 3921Plus modem.
Page 40: Using The Diagnostic Control Panel (Dcp)
COMSPHERE 392xPlus Modems configuration, then you must change the factory setting using either the modem’s DCP (as described in the following sections) or the AT command set. The purpose of having preset configurations is so that you can have a “head start” in getting your modem operating and reducing the amount of time required to configure your modem.
Page 41: Dcp Operation
DCP Operation Overview ........... . Diagnostic Control Panels .
Page 42: Status Indicators
The diagnostic control panel (DCP) of the Model 3920Plus modem (Figure 3-1) contains status indicators, pushbutton-type keys, an LCD, and speaker grill. ALRM DIAG TEST RATE DIAL COMSPHERE 3920Plus 496-14412-02 Figure 3-1. Model 3920Plus DCP Model 3921Plus Faceplate and Shared Diagnostic Control Panel (SDCP) The shared diagnostic control panel (SDCP), Figure 3-2, is used to manage carrier-mounted Model 3921Plus modems.
Page 43 DCP Operation MULTIPORT SINGLEPORT Status Status Status Alrm Alrm Alrm Diag Test Test Diag Dial Dial Busy Busy Serv Serv Port Front Panel Front Panel Spkr Spkr 3921Plus 3921Plus CARRIER SLOTS 1–16 Select COMSPHERE 3000 OK Alarm BckUp Test 496-14676-01 SELECT STATUS KEYPAD...
Page 44 COMSPHERE 392xPlus Modems Table 3-1 (1 of 2) 392xPlus DCP LEDs Label Color Indicates green Power has been applied to the modem. Alrm Flashing – A major alarm has been detected in a remote 392xPlus modem. ON – A major alarm has been detected in the local modem. (For Health and Status alarm conditions, refer to Table 4-1 in Chapter 4, Status Branch.)
Page 45: Sdcp Leds
DCP Operation Table 3-1 (2 of 2) 392xPlus DCP LEDs Label Color Indicates Port* 1,2,3,4 green ON – The selected port* is one of the mux ports (either 1, 2, 3, or 4). (3921Plus OFF – The port* is not selected. multiport only) TXD/103* green...
Page 46: Diagnostic Control Panel Operation
COMSPHERE 392xPlus Modems Diagnostic Control Panel Operation The 392xPlus modem’s diagnostic control panel (DCP) is the user interface to all functions used to configure and control the modem. In addition to the status LEDs, this interface includes the liquid crystal display (LCD) and keypad (Figure 3-3). LCD TOP LINE HIDDEN CHOICE INDICATOR...
Page 47: Other Indicators
DCP Operation Other Indicators Other indicators may turn on depending on existing conditions, such as error detection, informational alerts, and warnings. These indicators appear on the top or bottom line of the LCD. Remote Mode Indicator If the local 392xPlus modem establishes a connection with the remote 392xPlus modem via the Remote branch, then appears in the upper right corner of the LCD top line on both modems.
Page 48: Menu Structure
COMSPHERE 392xPlus Modems Keys Function keys F1, F2, and F3 select the LCD choice that appears above the function key. If the displayed LCD choice spans more than one function key, then any of the function keys can select that choice. (The screen examples in this manual use the F1 key to illustrate selection when multiple function keys select the choice.) Key (Model 3921Plus only) Select...
Page 49 DCP Operation The menu tree contains the following branches: Quick Config — Used to display the basic operational characteristics of the modem. Status — Used to monitor the current status of the VF line and DTE interface as well as view the identity of the modem. Configure —...
Page 50: Top-Level Menu Status And Operational Messages
COMSPHERE 392xPlus Modems Top-Level Menu Status and Operational Messages Access to all menu tree branches from the DCP begins at the Top-Level menu, the head of the menu hierarchy. The LCD’s top line identifies the modem status, as listed in Table 3-3, while the bottom line displays the main menu tree branches as well as operational and security messages, as listed in Table 3-4...
Page 51 DCP Operation Table 3-3 (2 of 3) Top-Level Menu Status Status Message Indicates Call Failure Busy Signal The answering modem is busy. Delayed As a result of failed call attempts, this number can not be called at this Number { time.
Page 52 COMSPHERE 392xPlus Modems Table 3-3 (3 of 3) Top-Level Menu Status Status Message Indicates Call Disconnect ATH Disconnect The modem has disconnected due to an ATH command. Bad Lines Disc The modem has disconnected because the lines do not support the modulation and/or data rate selected.
Page 53: Common Operational Messages
DCP Operation Messages listed in Table 3-4 are common operational messages that occur during modem operation. These messages normally appear on the second line of the LCD. Table 3-4 Common Operational Messages Common Indicates Operational Message Please Wait... A command to a local device takes more than two seconds to complete. Command Sent...
Page 54: Quick Configuration Display
COMSPHERE 392xPlus Modems Quick Configuration Display The Quick Configuration display indicates the basic operational characteristics of the modem. Leased:33.6 Status Configure The modem’s Quick Configuration information appears on the LCD’s bottom line. To access the Quick Configuration display from the Top-Level display, press the key.
Page 55 DCP Operation The following provides information about the Quick Configuration LCD display. Displays the network position of the modem. The letter C indicates this is a control modem, and T indicates this is a tributary modem. Displays the network management address of the modem. The valid address field range is from 001 to 256.
Page 56 COMSPHERE 392xPlus Modems This page intentionally left blank. 3-16 October 1998 3920-A2-GH30-40...
Page 57 DCP Operation Diagnostic Control Panel Access NOTE This page of the manual is self supporting and can be removed to prevent unwanted knowledge of the DCP security access selections. Use the DCP security access function to “lock” the DCP of any 392xPlus modem and prevent unwanted user access.
Page 58 COMSPHERE 392xPlus Modems 3-18 October 1998 3920-A2-GH30-40...
Page 59 Status Branch Status Branch ..........Device Health and Status (DeviceHS) .
Page 60 COMSPHERE 392xPlus Modems “Status” Configure PList Control Test SubHS Call_Setup Tlk/Data Security Remote Status Port Select DeviceHS Identity V.34 Backup Options Record Service_Log Display Clear Major Ser# TxRate Line = Pri 4W APL Display RxRate Line = Pri 2W APL Minor Clear Mod#...
Page 61: Status Branch
Status Branch Device Health and Status (DeviceHS) DeviceHS provides a ‘‘snapshot” of current modem alarms which are active at the time the DeviceHS function is selected. To access DeviceHS from the Status branch, make the following selection: Status: > DeviceHS Select DeviceHS.
Page 62 COMSPHERE 392xPlus Modems Table 4-1 (2 of 3) Health and Status Messages Type Message Indicates Status Subtree Truncate Downstream health and status information has been truncated because it overflowed system limits. There is a large amount of health and status information in the subnetwork.
Page 63 Status Branch Table 4-1 (3 of 3) Health and Status Messages Type Message Indicates Security Database Reset The security database has been reset (passwords erased). Password Protect Security password protection is enabled. Mode Change There has been a change in security mode. (Refer to Chapter 12, Dial Access Security.) Password Change...
Page 64: Displaying Vf Conditions
COMSPHERE 392xPlus Modems Displaying VF Conditions Status:VF Display Clear To display VF conditions, select Display from the Status:VF screen. Status:VF > SigQual=Excelent If the modem is receiving a signal, the signal quality appears on the LCD’s bottom line. If the modem is not receiving a signal, the message No Signal appears.
Page 65: Clearing Vf Counters
Status Branch EchoFreqOff Echo Frequency Offset displays the frequency offset of the far end echo. This parameter appears for V.34, V.32terbo, V.32bis, and V.32 modulations (in 2-wire only). Phase Hts Phase Hits reports the total hit count of sudden uncontrolled changes in the phase of the receive signal for the past 15 minutes.
Page 66: Identity
COMSPHERE 392xPlus Modems VF Counter Clear Command Complete The message Command Complete appears on the LCD’s bottom line indicating the VF Counters are cleared. To exit VF and remain in the Status branch, press the key. To exit and return to the Top-Level menu, press the key.
Page 67: Dte
Status Branch To exit the Identity function and remain in the Status branch, press the key. To exit and return to the Top-Level menu, press the key. DTE displays the state and/or activity of the following interface leads: LSD, DTR, DSR, TST, TXD, RXD, RTS, and CTS.
Page 68: Sdc
COMSPHERE 392xPlus Modems When running synchronous data compression, the SDC function displays information about the modem’s transmitting and receiving DTE rate, compression ratio, and line efficiency. NOTE Once a connection terminates, the last valid parameters are locked in place until the next connection. To access SDC from the Status branch, make the following selections: Status: V.34...
Page 69: Sdc Performance Measurements
Status Branch Table 4-2 SDC Performance Measurements Group DTE Rate Compression Ratio Line Efficiency The number of bits per second The ratio between the number of The ratio between the number of received from the DTE. This bits in the input and output of the bits per second sent on the line, number takes into account only compression algorithm.
Page 70 COMSPHERE 392xPlus Modems If the modem is receiving a signal, the signal quality appears on the second LCD line. Press the key to scroll and view the V.34 modem receive rate, symbol rate, transmit rate, and asymmetric. If the modem is not receiving a signal, the message No Sync appears. TxRate Modem Transmit Rate indicates the rate at which the modem is transmitting data.
Page 71: Backup
Status Branch Backup The Status Backup function displays the configuration of the modem’s current operating line facility and the configuration and condition of the inactive line. NOTE The modem’s rear panel has two line interface jacks: LEASE and DIAL (see Figure 2-2 in Chapter 2).
Page 72: Backup Status Screens
COMSPHERE 392xPlus Modems Table 4-3 Backup Status Screens Active Line Inactive Line Possible Inactive/Backup Line Condition 1st Screen Display 2nd Screen Display Line=Pri 4w APL Bckup:2wAPL=XXXX Good indicates that line continuity is detected. Bad indicates that line continuity is not detected. Line=Pri 2w APL Bckup : Dial =(blank) ???? indicates that the line condition is unknown (Backup...
Page 73: Options
Status Branch Options The Options Status function displays all optional firmware features currently installed in the modem. If no firmware options are installed, None_Installed appears on the LCD. To access Options from the Status branch, make the following sections: Status: Options Press the key until Options appears.
Page 74: Record
COMSPHERE 392xPlus Modems Record Record is a troubleshooting tool used in conjunction with support personnel. This function retrieves and reports any sequence faults to support personnel. A sequence fault is an irregular or unexpected event. There are two selections under Record: Display and Clear. Display allows up to eight sequence fault messages that are recorded by the modem and displayed on the LCD in descending order.
Page 75: Service Log
Status Branch Service Log Service Log is a troubleshooting tool used in conjunction with support personnel. Use this function to retrieve and report Service Log data to support personnel. To access Service Log from the Status branch, make the following selections: Status: <...
Page 76 COMSPHERE 392xPlus Modems 4-18 October 1998 3920-A2-GH30-40...
Page 77: Overview
Configure Branch Overview ........... . Configure Branch .
Page 78 COMSPHERE 392xPlus Modems • Factory is a read-only (unchangeable) configuration area containing six sets of predefined configuration options labeled Sync Leased, Async Leased, TMp (Trellis Multipoint), Async Dial, Sync Dial, and UNIX Dial. If Sync Leased or Async Leased is selected, you must choose either Answer or Originate mode.
Page 79: Configure Branch
Configure Branch Configure Branch The Configure branch of the Top-Level menu contains all of the modem’s configuration options which determine how the modem operates. These configuration options are accessed by scrolling down and across various levels of the Configure branch. “Status”...
Page 80: Editing And Saving A Configuration Option
COMSPHERE 392xPlus Modems The Configure branch consists of the following three levels: • Ld EditArea frm. Allows the selection of the Active (Operating), Active (Saved), Customer 1, Customer 2, and Factory configuration areas. • Choose Function. Allows you to make changes (Edit) to existing configuration options or write (Save) these changes to either the Active (Saved), Customer 1, or Customer 2.
Page 81 Configure Branch Ld Fact Preset: > Sync_Leased Select Sync_Leased. Choose Mode: Answer Originate Select Answer. Choose Function: Edit Save Select Edit. Edit StrapGroup: > DTE_Interface Edit StrapGroup Test Misc Scroll across the LCD and select the Misc configuration options group. 3920-A2-GH30-40 October 1998...
Page 82 COMSPHERE 392xPlus Modems StrapsWhenDisc > No_Change RemAccssPasswrd: "00000000 Select Nxt until RemAccssPasswrd appears. RemAccssPasswrd: "10000000 Select the F2 ( " ) key to increment password values. RemAccssPasswrd: "10000000 Press the key to move the cursor to the next position. RemAccssPasswrd: "12345678 Continue this sequence until you have entered the new password value.
Page 83 Configure Branch To save the new password to a configuration area, make the following selections: RemAccssPasswrd: "12345678 Press the key to scroll up (twice). Choose Function Edit Save Select Save. Sav EditArea to > Active(Saved) Select a configuration area (Active (Saved), Customer 1, or Customer 2) to save the changes. Select the key to exit to the Top-Level menu or select the key to remain in the Configure...
Page 84: Configuration Tables
COMSPHERE 392xPlus Modems Configuration Tables Each modem operates in either the Multiport or Singleport mode depending on the modem’s configuration (refer to 392xPlus Operational Modes in Chapter 1, Introduction). The modem’s configuration options are arranged into six groups in the Multiport mode, and nine groups in the Singleport mode.
Page 85: Multiport Mode
Configure Branch Multiport Mode V.42/ Test Misc Line Dial Leased_Line Security MNP/ Interface Dialer Dialer Line Buffer AutoAnswerRing# Dial Modulation LeaseModulation Test Timeout StrapsWhenDisc Dialer Type Dial Line Rate LeasedLine Rate V54 Address Speaker Control DialTone Detect Autorate Leased Mode V54 Device Type Speaker Volume Blind Dial Paus...
Page 86: Dte Interface - Multiport Mode
COMSPHERE 392xPlus Modems DTE Interface — Multiport Mode l The DTE Interface configuration options contain EIA-232-D (ITU-T V.24) and asynchronous character format information essential for maintaining a connection and for transmitting data between the DTEs and the modem. Table 5-1 shows each DTE Interface configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is newly installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 87 Configure Branch Table 5-1 (2 of 9) DTE Interface Configuration Options — Multiport Mode l Port4 Ext Alarm: Disable Nxt Disable EnableLow EnableHigh This configuration option only appears when MUX Mode is configured for TDM/MSD. Port 4 External Alarm Monitor. Determines if Port 4 can be used to transmit user data. When enabled, this configuration option prevents Port 4 of the modem from being used to transmit user data.
Page 88 COMSPHERE 392xPlus Modems Table 5-1 (3 of 9) DTE Interface Configuration Options — Multiport Mode l MSD Port Control: Host Nxt Host Modem This configuration option does not appear when MSD is disabled. Modem Sharing Device Port Control. Host – The host computer determines the polling sequence that controls which port transmits at any given time. When the DTE/DCE equipment attached to a port raises RTS (Request-to-Send) it gets to use the channel.
Page 89 Configure Branch Table 5-1 (4 of 9) DTE Interface Configuration Options — Multiport Mode l Rate at 14.4 K Nxt Disable 14400 12000 9600 7200 4800 2400 1200 Rate at 14.4K. When the modem rate is 14,400 bps the port rate will be as selected by this configuration option (Disable or 14400 to 1200).
Page 90 COMSPHERE 392xPlus Modems Table 5-1 (5 of 9) DTE Interface Configuration Options — Multiport Mode l Asyn #Data Bits: 8 Nxt 8 7 9 6 This configuration option only appears when Async/Sync Mode is configured for Async. Asynchronous Number of Data Bits. Determines if the asynchronous data length is composed of 6, 7, 8, or 9 data bits. This data length excludes start, parity, and stop bits.
Page 91 Configure Branch Table 5-1 (6 of 9) DTE Interface Configuration Options — Multiport Mode l DSR Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR On_Early Delay_ToData Data Set Ready Control. DSR is a signal from the modem to the DTE indicating the modem is connected and ready for operation.
Page 92 COMSPHERE 392xPlus Modems Table 5-1 (7 of 9) DTE Interface Configuration Options — Multiport Mode l CTS Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Follows_RTS Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE. Standard RS232 –...
Page 93 Configure Branch Table 5-1 (8 of 9) DTE Interface Configuration Options — Multiport Mode l XTXC Clamps TXC: Enable Nxt Enable Disable This configuration option only appears when the TX Clock Source or Bakup_TXClk_Src configuration option is set to Port 1, 2, 3, or 4 and Async/Sync mode is Sync. External Transmit Clock Clamps Transmit Clock.
Page 94 COMSPHERE 392xPlus Modems Table 5-1 (9 of 9) DTE Interface Configuration Options — Multiport Mode l Port TXC Source: Internal Nxt Internal External Port Transmit Clock Source. Determines the clock source used to clock transmit data into the port buffer from Pin 2 (TXD) of the EIA-232-D interface.
Page 95 Configure Branch Line Dialer — Multiport Mode l The Line Dialer configuration options establish parameters used by the modem to answer or originate calls. Table 5-2 shows each Line Dialer configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 96 COMSPHERE 392xPlus Modems Table 5-2 (2 of 3) Line Dialer Configuration Options — Multiport Mode l Blind Dial Paus: 2sec Nxt 2sec 4sec 6sec 8sec 10sec 20sec This configuration option only appears when Dial Tone Detect is disabled. Blind Dial Pause. Determines how long the modem waits before dialing a telephone number when Dial Tone Detect is disabled.
Page 97 Configure Branch Table 5-2 (3 of 3) Line Dialer Configuration Options — Multiport Mode l Long Space Disc: Enable Nxt Enable Disable Long Space Disconnect. Determines the modem’s response to a continuous spacing condition sent from the remote modem before it goes on-hook. Issuing a long space is one method of disconnecting a call. Enable –...
Page 98 This configuration option is ignored unless Dial Line Rate is 4800(V32b). V.32bis Override. Activates the Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
Page 99 Configure Branch Table 5-3 (2 of 3) Dial Line Configuration Options — Multiport Mode l Dial Tx Level: Permissv(–9) Nxt Permissv(–9) –10 –11 –12 –13 –14 –15 –16 –17 –18 –19 –20 –21 –22 –23 –24 –25 –26 –27 –28 –29 –30 –31 –32 Dial Transmit Level.
Page 100 COMSPHERE 392xPlus Modems Table 5-3 (3 of 3) Dial Line Configuration Options — Multiport Mode l Asymmetric Rate: Disabled End Enable Disable This configuration option only appears when V.34 is enabled. Asymmetric Rate. Controls rate symmetry when running V.34 modulation by enabling or disabling the V.34 modulation from using equal transmit and receive rates.
Page 101 Configure Branch Leased Line — Multiport Mode l The Leased Line configuration options only appear when the Sync Leased factory preset template is selected. They are used to configure the modem for operation over leased lines. Table 5-4 shows each Leased Line configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 102 Nxt Disable 2400 This configuration option only appears when Leased-Line Rate is 4800(V32b). V.32bis Override. Activates the Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
Page 103 Configure Branch Table 5-4 (3 of 5) Leased Line Configuration Options — Multiport Mode l 2 Sec LSD Hold: Disable Nxt Disable Enable This configuration option only appears when V.34 is enabled. Two-Second LSD Hold. Holds the Line Signal Detect (LSD) for a maximum of two seconds. During this time, the carrier can drop completely and be reacquired by the receiver without retraining.
Page 104 COMSPHERE 392xPlus Modems Table 5-4 (4 of 5) Leased Line Configuration Options — Multiport Mode l AutoDialStandby: Disable Nxt Disable 15min 1hr 4hr Test(2min) Adv 15min Adv 30min Adv 1 hr TestAdv2min Automatic Dial Standby. Permits a modem operating on dial lines (regardless of the method of dialing origination) to check the quality of the leased lines periodically and, if they are good, to disconnect from the dial lines and resume operations on the leased lines.
Page 105 Configure Branch Table 5-4 (5 of 5) Leased Line Configuration Options — Multiport Mode l TMp TxPre-Value: 5 Nxt 0 1 2 3 4 5 6 7 8 9 A B C D E F This configuration option only appears if Leased-Line Rate is configured for TMp. Trellis Multipoint (TMp) Transmit Preemphasis Value.
Page 106 COMSPHERE 392xPlus Modems Test — Multiport l The Test configuration option determines the duration of a test. Table 5-5 shows the Test configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 107 Configure Branch Misc — Multiport l The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. Table 5-6 shows each Misc (Miscellaneous) configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 108 COMSPHERE 392xPlus Modems Table 5-6 (2 of 4) Miscellaneous Configuration Options — Multiport Mode l Dir#1_Callback: Disable Nxt Disable Enable Directory Location 1 Callback. This configuration option controls whether or not the modem’s single number callback function is used. Disable – Modem does not use the single number callback function. Enable –...
Page 109 Configure Branch Table 5-6 (3 of 4) Miscellaneous Configuration Options — Multiport Mode l VF_Prompt_Type: 2nd_DialTone Nxt 2nd_DialTone Quiet_Answer This configuration option only appears when the Special Security configuration option is set to RemAccsPswd or CallbkDir#. VF Prompt Type. Determines how the answering modem requests a valid password from the originating modem for the valid password.
Page 110 COMSPHERE 392xPlus Modems Table 5-6 (4 of 4) Miscellaneous Configuration Options — Multiport Mode l Diag Connection: Modem(DC) Nxt Modem(DC) NMS(CC) Disable This configuration option does not appear when the LeaseLine Rate is configured for TMp, and NetworkPosition is configured for Tributary. NOTE: TMp tributaries cannot be diagnostically extended, therefore the Diag Connection configuration option is forced to Disable.
Page 111 Configure Branch Singleport Mode A In Singleport mode, the modem’s configuration options are arranged into nine groups based on functionality: • DTE Interface (Table 5-7) • DTE Dialer (Table 5-8) • Line Dialer (Table 5-9) • Dial Line (Table 5-10) •...
Page 112: Singleport Mode
COMSPHERE 392xPlus Modems Singleport Mode Test Security Line Leased_Line Interface Dialer AutoAnswerRing# LeaseModulation DTE RL(CT140) Entry_Wait_Time Dialer Type LeasedLine Rate DTE LL(CT141) VF_Prompt_Type Port 1 DialTone Detect Leased Mode Test Timeout DTE_PW_Tries MUX Mode Async/Sync Mode Blind Dial Paus Autorate Rcv Remote Loop DTE_PW_TermChar Sync DTE Rate...
Page 113: Dte Interface - Singleport Mode
Configure Branch DTE Interface — Singleport Mode The DTE Interface configuration options contain EIA-232-D (ITU-T V.24) and asynchronous character format information essential for maintaining a connection and for transmitting data between the DTE and the modem. Table 5-7 shows each DTE Interface configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 114: V.42/Mnp/Buffer - Singleport Mode
COMSPHERE 392xPlus Modems Table 5-7 (2 of 8) DTE Interface Configuration Options — Singleport Mode A Async DTE Rate: 19200 Nxt 19200 115200 76800 57600 38400 28800 14400 12000 9600 7200 4800 2400 1200 0–300 This configuration option only appears when Async/Sync Mode is configured for Async. Asynchronous DTE Data Rate.
Page 115 Configure Branch Table 5-7 (3 of 8) DTE Interface Configuration Options — Singleport Mode A Asyn #Stop Bits: 1 Nxt 1 2 This configuration option only appears when Async/Sync Mode is configured for Async. Asynchronous Number of Stop Bits. Selects 1 or 2 bits to signal the end of an asynchronous character. NOTE: If the DTE Dialer Type configuration option is set to AT or V.25bis Async, then the total character size must equal 10 bits.
Page 116 COMSPHERE 392xPlus Modems Table 5-7 (4 of 8) DTE Interface Configuration Options — Singleport Mode A DSR Control: Stndrd_RS232 (Cont.) Delay to Data – Operation is similar to the Standard RS232 except that DSR does not turn ON until the modem enters Data mode.
Page 117 Configure Branch Table 5-7 (5 of 8) DTE Interface Configuration Options — Singleport Mode A CTS Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Follows_RTS Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE. Standard RS232 –...
Page 118 COMSPHERE 392xPlus Modems Table 5-7 (6 of 8) DTE Interface Configuration Options — Singleport Mode A LSD Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Sim_Cntl_Car =DTR/DiscOFF Line Signal Detect Control. LSD is a signal indicating that the carrier signal is being received from the remote modem. It is normally turned OFF to the DTE when the power level of the received carrier signal drops below the carrier detect threshold.
Page 119 Configure Branch Table 5-7 (7 of 8) DTE Interface Configuration Options — Singleport Mode A Bakup_TXClk_Src: Internal Nxt Internal External RXC_Loop This configuration option only appears in customized installations in which the Dual_Leased_Ln is configured for Enable and Async/Sync Mode is Sync. Backup Transmit Clock Source.
Page 120 COMSPHERE 392xPlus Modems Table 5-7 (8 of 8) DTE Interface Configuration Options — Singleport Mode A DTE_Rate=VF: Disable Nxt Disable Enable This configuration option does not appear when Async/Sync is configured for Sync. DTE Rate = VF. Forces the DTE’s data rate to be equal to the VF (telephone line) data rate. Disable –...
Page 121 Configure Branch DTE Dialer — Singleport Mode The DTE Dialer configuration options establish the DTE-to-modem protocol for call establishment and control. Table 5-8 shows each DTE Dialer configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 122 COMSPHERE 392xPlus Modems Table 5-8 (2 of 5) DTE Dialer Configuration Options — Singleport Mode A AT Escape Char: 043 ASCI Nxt " 043 ASCI This configuration option only appears when DTE Dialer Type is configured for AT. AT Escape Character. The escape sequence (+++) allows you to move from Data mode to Command mode. Use the ATO command to return to Data mode.
Page 123 Configure Branch Table 5-8 (3 of 5) DTE Dialer Configuration Options — Singleport Mode A Linefeed Char: 010 Nxt " 010 ASCI This configuration option only appears when DTE Dialer Type is configured for AT. Line Feed Character. Sets the character used to perform a line feed in Command mode for responses from the modem. The AT command is S-Register S4 = n, where n is a value from 0 to 127.
Page 124 COMSPHERE 392xPlus Modems Table 5-8 (4 of 5) DTE Dialer Configuration Options — Singleport Mode A ResultCode Form: Words Nxt Words Numbers (1) Numbers (2) This configuration option only appears when DTE Dialer Type is configured for AT. Result Codes Format. Controls whether or not result codes appear as words or as numeric codes. Some DTEs do not recognize Result Codes as words;...
Page 125 Configure Branch Table 5-8 (5 of 5) DTE Dialer Configuration Options — Singleport Mode A V25b NewLineChr: CR+LF End CR+LF CR LF This configuration option only appears when DTE Dialer is configured for V.25bis Async. V.25bis New Line Character. Sets the modem for the command line terminator used by the DTE in V.25bis Async mode. The modem responds to the DTE using the same line terminator.
Page 126 COMSPHERE 392xPlus Modems Table 5-9 (2 of 4) Line Dialer Configuration Options — Singleport Mode A DialTone Detect: Enable Nxt Enable Disable Dial Tone Detect. Sets the modem for dial tone detection (Enable) or blind dialing (Disable). Enable – Modem disconnects the call if a dial tone is not detected within 10 seconds and displays No Dial Tone on both the LCD and asynchronous DTE terminal.
Page 127 Configure Branch Table 5-9 (3 of 4) Line Dialer Configuration Options — Singleport Mode A Fast Disconnect: Disable Nxt Disable Enable Fast Disconnect. Allows the modem to disconnect immediately after receiving a disconnect command from a local DTE or its own diagnostic control panel. Disable –...
Page 128 COMSPHERE 392xPlus Modems Table 5-9 (4 of 4) Line Dialer Configuration Options — Singleport Mode A No Data Disc: Disable Nxt Disable 10min 30min 60min No Data Disconnect. Forces the modem to disconnect if no data is transmitted and received within a specified amount of time.
Page 129 Configure Branch Dial Line — Singleport Mode The Dial Line configuration options are used to configure the modem for operation over dial lines. Table 5-10 shows each Dial Line configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 130 This configuration option is ignored unless Dial Line Rate is 4800(V32b). V.32bis Override. Activates the Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
Page 131 Configure Branch Table 5-10 (3 of 4) Dial Line Configuration Options — Singleport Mode A V22b Guard Tone: Disable Nxt Disable 550Hz 1800Hz This configuration option only appears when Dial Line Rate is configured for V.22bis or V.22 data rate, or when Automode is configured for Enable.
Page 132 COMSPHERE 392xPlus Modems Table 5-10 (4 of 4) Dial Line Configuration Options — Singleport Mode A V.34 Precoder: Disable Nxt Disable Enable This configuration option only appears when V.34 is enabled. V.34 Precoder. Determines whether the V.34 Precoder is used when operating with V.34 family modulation on either dial or leased lines.
Page 133 Configure Branch Leased Line — Singleport Mode The Leased Line configuration options only appear when the Sync Leased factory preset template is selected. They are used to configure the modem for operation over leased lines. Table 5-11 shows each Leased Line configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 134 COMSPHERE 392xPlus Modems Table 5-11 (2 of 7) Leased Line Configuration Options — Singleport Mode A LeasedLine Rate: 33600(V34) (Cont.) NOTE: The modem must be in DirectMode before the modulation scheme can be changed from V.32bis, V.34 family, or TMp to another leased-line modulation (V.33, V.29, or V.22bis). See Err Contrl Mode configuration option for more about DirectMode.
Page 135 This configuration option is ignored unless Leased-Line Rate is 4800(V32b). V.32bis 4800 Override. Activates the Paradyne Point-to-Point Diagnostic 2400 bps modulation. Allows the modem to use a non-standard, point-to-point modulation capable of secondary channel diagnostics while running at 2400 bps.
Page 136 COMSPHERE 392xPlus Modems Table 5-11 (4 of 7) Leased Line Configuration Options — Singleport Mode A 2W SQ Retrain: Disable Nxt Disable 1 2 3 4 5 This configuration option is available only if Leased Mode is 2WLL-Orig or 2WLL-Ans and affects only V.34, V.32bis, and V.32 modulations.
Page 137 Configure Branch Table 5-11 (5 of 7) Leased Line Configuration Options — Singleport Mode A AutoDialStandby: Disable Nxt Disable 15min 1hr 4hr Test(2min) Adv 15min Adv 30min Adv 1 hr TestAdv2min Automatic Dial Standby. Permits a modem operating on dial lines (regardless of the method of dialing origination) to check the quality of the leased lines periodically and, if they are good, to disconnect from the dial lines and resume operations on the leased lines.
Page 138 COMSPHERE 392xPlus Modems Table 5-11 (6 of 7) Leased Line Configuration Options — Singleport Mode A V29 TrainOnData: Disable Nxt Disable Enable This configuration option only appears when Leased-Line Rate is configured for V29. V.29 Train On Data. When enabled, the modem receiver can train based upon the incoming data or a training sequence from the distant modem.
Page 139 Configure Branch Table 5-11 (7 of 7) Leased Line Configuration Options — Singleport Mode A Dual_Leased_Ln: Disable End Disable Enable Dual Leased Line. Allows the 2-wire backup facility to function as a 2-wire leased line facility. When this configuration option is disabled, the backup facility is a 2-wire dial line. NOTE: Plug the leased line into the jack labeled DIAL on the rear panel of the modem (see Figure 2-1 in Chapter 2).
Page 140 COMSPHERE 392xPlus Modems V.42/MNP/Buffer — Singleport Mode V.42/MNP/Buffer configuration options determine the type of error correction and flow control used by the modems and attached DTEs. Some choices within this group may not appear depending upon how previous configuration options have been selected. Table 5-12 shows each V.42/MNP/Buffer configuration option as it appears on the LCD, with the Async Dial factory default setting shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 141 Configure Branch Table 5-12 (2 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A Err Contrl Mode: V.42/MNPorBfr (Cont.) The AT command for BufferMode is \N0. The AT command for DirectMode is \N1. The AT command for MNP or Disconnect is \N2. The AT command for MNP or Buffer is \N3.
Page 142 COMSPHERE 392xPlus Modems Table 5-12 (3 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A EC Fallbck Char: 013 ASCI Nxt " 013 ASCI This configuration option only appears when Async/Sync Mode is configured for Async, and EC Negotiate Buffer is not configured for Disable. Error Control Fallback Character.
Page 143 Configure Branch Table 5-12 (4 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A XON/XOFF Psthru: Disable Nxt Disable Enable This configuration option only appears when Async/Sync Mode is configured for Async, Error Control Mode is not configured for DirectMode, and Flow Control of Modem is configured for XON/XOFF. XON/XOFF Passthrough.
Page 144 COMSPHERE 392xPlus Modems Table 5-12 (5 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A Send Break Cntl: Data_First End Data_First Break_First This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. Send Break Control.
Page 145 Configure Branch Table 5-12 (6 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A SDC Idle Fill: Flag_Fill Nxt Flag_Fill Mark_Fill This configuration option only appears when the Async/Sync Mode configuration option is set is to Sync and Sync Comp Mode configuration option is not set to DirectMode. Synchronous Data Compression Idle Fill.
Page 146 COMSPHERE 392xPlus Modems Table 5-12 (7 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A Sync Flow Cntrl: Tx_Clock Nxt Tx_Clock None CTS_SyncDTE This configuration option only appears when the Async/Sync Mode configuration option is set is to Sync and Sync Comp Mode configuration option is not set to DirectMode.
Page 147 Configure Branch Table 5-12 (8 of 8) V.42/MNP/Buffer Configuration Options — Singleport Mode A RdcdAsyncBufSiz: Disable End Disable Enable This configuration option only appears when Async/Sync Mode is configured for Async, and Error Control Mode is configured for BufferMode or V42/MNPorBfr. Reduced Asynchronous Buffer Size.
Page 148 COMSPHERE 392xPlus Modems Table 5-13 (2 of 2) Test Configuration Options — Singleport Mode A Test Timeout: Disable Nxt Disable 30sec 60sec 240sec Test Timeout. Determines how long a test runs before aborting. Disable – Allows a test to run indefinitely. 30, 60, or 240 seconds –...
Page 149 Configure Branch Misc — Singleport Mode The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. Table 5-14 shows each Misc (Miscellaneous) configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being installed) shown following the colon ( : ) on the first line and with all available selections listed on the second line.
Page 150 COMSPHERE 392xPlus Modems Table 5-14 (2 of 5) Miscellaneous Configuration Options — Singleport Mode A Access frm Remt: Enable Nxt Enable Disable Access from Remote. Determines if your modem’s DCP can be accessed by a remote modem via the VF line. CAUTION: If this configuration option is disabled, the modem cannot be accessed by another modem.
Page 151 Configure Branch Table 5-14 (3 of 5) Miscellaneous Configuration Options — Singleport Mode A SpecialSecurity: Disable Nxt Disable RemAccsPswd CallbkDir# This configuration option only appears when the modem is in Dial Only mode or Lease Answer Mode, and Answer Security Mode is configured for No_Answ_Sec. Special Security.
Page 152 COMSPHERE 392xPlus Modems Table 5-14 (4 of 5) Miscellaneous Configuration Options — Singleport Mode A NMS_Call_Msgs: CallCnct&Prg Nxt CallCnct&Prg Disable CallCnctOnly CallProgOnly NMS Call Messages. Determines if the modem status and/or call summary information is sent to the NMS. The modem can itemize status, such as CallProgress messages, or it can report a summary of activity, such as Call Connect messages, to the NMS.
Page 153 Configure Branch Table 5-14 (5 of 5) Miscellaneous Configuration Options — Singleport Mode A Diag Connection: Modem(DC) Nxt Modem(DC) NMS(CC) Disable Diagnostic Connection. Allows the configuration of the serial diagnostic port of the modem to be either a diagnostic channel that is connected to another modem (DC), or a control channel that is connected to a network management device (CC).
Page 154 COMSPHERE 392xPlus Modems Security — Singleport Mode The Security configuration options allow you to set the parameters that control how a dial access security password is entered. For security configuration options, refer to Chapter 12, Dial Access Security. 5-78 October 1998 3920-A2-GH30-40...
Page 155 Poll List Branch Poll List Branch ..........Display .
Page 156: Display
COMSPHERE 392xPlus Modems To access PList from the Top-Level menu, make the following selections: Leased:33.6 PList Control Press the key until PList appears. Select PList. Within a network link, a control modem can communicate with a tributary modem by using the tributary modem’s network management address for polling functions.
Page 157: Clear
Poll List Branch If there are modems in the poll list when you select Display, Displays the network management address of the modem in the poll list. yyyyyy Displays either Active or Skip to indicate the poll list in which the network management address is included.
Page 158 COMSPHERE 392xPlus Modems Change allows you to add modems to the Active poll list (Active), delete modems from both Active and Skip poll lists (Delete), and move modems from the Active to the Skip poll list. Poll List:Chang > Active Delete To implement Change, select the appropriate function (Active, Delete, or Skip).
Page 159: Add
Poll List Branch The Add function does not appear in Remote mode or on control modems. Add allows you to add the tributary modem to a control modem’s poll list. This function should be initiated from only one tributary modem at a time. To access Add from the Plist branch, make the following selections: Poll List: Change...
Page 160 COMSPHERE 392xPlus Modems Press the key until Acquire appears. Select Acquire. NOTE If an error message (OtherTestActive or Unable To Acquir) appears on the second line of the LCD, move up one level in the menu tree to clear the message and return to the PList Acquire branch.
Page 161: Status
Control Branch Control Branch ..........Speaker .
Page 162: Control
COMSPHERE 392xPlus Modems To access Control from the Top-Level menu, make the following selections: Leased:33.6 Control Test Press the key until Control appears. Select Control. Speaker Speaker allows you to make temporary adjustments to the modem’s speaker volume. Upon a reset, speaker volume returns to its configured setting.
Page 163 Control Branch Reset Reset causes the modem to stop operation and perform a complete program restart. The modem begins the power-up test sequence that ends with the Top-Level menu displayed on the LCD. Configuration options stored in an Active (Saved) configuration area are copied to the Active (Operating) configuration area.
Page 164 COMSPHERE 392xPlus Modems Now go to the next screen (Data Stream). Data Stream Port1 Disable The port field (for example, Port1) displays the selected port. The available Data Stream action (Disable or Enable) appears on the second line of the LCD beside the port field.
Page 165 Control Branch To enable or disable the modem’s data transmitter function on all ports, press the appropriate function key, F1 (Enable) or F3 (Disable). When the message Command Complete appears, press the key to clear the message. Select DS Port >...
Page 166 COMSPHERE 392xPlus Modems The port field (xxxxx) displays the currently selected interface. Valid interface selections are Port1, Port2, Port3, Port4, and depending on the set value of the Diagnostic Connection configuration option, CC (NMS Control Channel), or DC (Diagnostic Channel). Refer to Diag Connection configuration option in the Misc section of Chapter 5, Configure Branch.
Page 167: Call_Setup
Control Branch To remove the modem from Make Busy mode, press the key once and the key until RemoveMakeBusy appears. Control: RemoveMakeBusy Press any function key to select RemoveMakeBusy. The message Command Complete appears on the LCD. To exit this function and remain in the Control branch, press the key.
Page 168 COMSPHERE 392xPlus Modems Press F1 (Service_Line) to switch the modem from its normal dial line to the service line. Service_Line Command Complete The message Command Complete appears. Now, when the modem places a call, instead of using the dial, the call is placed on the service line. To disconnect the modem from the service line and resume normal operation, press the (returning to Control branch).
Page 169 Control Branch Selecting Clone Remote NOTE Clone Remote operations are not supported unless both local and remote modems are 392xPlus modems. (The 3800 or 391x Series modems cannot be used in cloning operations with 392xPlus modems.) To access DwnLoadSoftware from the Control branch, make the following selections: Control: Download_Code Press the...
Page 170 COMSPHERE 392xPlus Modems Clone Remote in Broadcast Configurations A tributary modem configured for extended diagnostics (Diagnostic Connection configuration option set to Modem(DC)) can perform two types of Remote Clone operations. It can clone the upstream, VF connected, control modem (SC_Clone) or it can clone all the 392xPlus modems attached to its downstream Diagnostic Channel (DC_Broadcast).
Page 171 Control Branch Viewing DC Broadcast Clone Results Choose DLL Type > DC_CloneResults From the Choose DLL Type screen, press the key until DC_CloneResults appears to view the results of the last DC_Broadcast clone operation. If the message Trib List Empty appears, this indicates that a multiple download was never initiated.
Page 172 COMSPHERE 392xPlus Modems • For Multiple download configurations, ensure that: — the tributaries are responding properly to polls (this may take several minutes after the control modem powers up). Refer to Chapter 9, Sub-Network Health and Status Branch, for more information. —...
Page 173 Control Branch Cloning a Multiple TMp Remote Choose DLL Type > Single Multiple Press the F3 key to select Multiple Clone Remote. After completing this action, proceed to the next section titled Implementing a Clone Remote Operation. Viewing Multiple TMp Clone Results Choose DLL Type >...
Page 174 COMSPHERE 392xPlus Modems Implementing a Clone Remote Operation WARNING The modem begins a transfer of its own program to the remote modem. This process takes the communication link out-of-service for a period of time depending on the data rate of the link. If the Clone Remote process is started and then interrupted, the remote modem is left in a partially programmed state in which its functional capabilities are limited to those required to initiate and complete another...
Page 175 Control Branch If unsuccessful, the modem remains in the Download Transfer mode. The LCD’s top line displays RemClone Failed and the bottom line displays one of the following messages: Incompat Modulat The modems are connected, but are using a modulation scheme other than V.34 family, V.33, V.32 family, V.29, or TMp.
Page 176 COMSPHERE 392xPlus Modems Automatic Firmware Download New releases may be available for the 392xPlus modem. The latest 392xPlus firmware is available at no charge from the Automatic Firmware Download Center. Refer to the Government Requirements and Equipment Return section in Chapter 1, Introduction, for contact information. To download the firmware, your modem must be configured for dialing.
Page 177 Control Branch VF Thresholds Update The VF Thresholds Update function allows you to set the thresholds that determine the Health and Status alarm conditions for the VF parameters. Refer to Table 7-1 in this section for VF thresholds and their valid ranges and default values. To access VF_Thresh_Update from the Control branch, make the following selections: Control: <...
Page 178 COMSPHERE 392xPlus Modems NOTE Note that a warning ( ) appears on the second line of the screen if you enter an invalid VF threshold (out of range). You cannot save your edits until all thresholds are within their valid range. Refer to Table 7-1 for valid VF threshold ranges.
Page 179 Control Branch If the edited VF thresholds are valid, the Save command stores them into nonvolatile memory. When the Save completes, the message Save Completed appears. Save VF Thresh Thd Out of Range If the edited VF threshold is invalid (out of range), the error message Thd Out of Range appears.
Page 180: Valid Ranges For Vf Thresholds
COMSPHERE 392xPlus Modems Table 7-1 Valid Ranges for VF Thresholds VF Thresholds Valid Ranges Default Values Receive Signal Level High 0 dBm to –15 dBm Above –9 dBm Receive Signal Level Low –16 dBm to – 50 dBm Below –23 dBm Signal to Noise Ratio 5 dB to 40 dB Below 23 dB...
Page 181: Tlk/Data
Test Branch Test Branch ........... Abort .
Page 182 COMSPHERE 392xPlus Modems NOTE What Test branch selections are available depends on your modem’s configuration. See the description of each test for more information. To access the Test branch from the Top-Level menu, make the following selections: Leased:33.6 Control Test Press the key until Test appears.
Page 183 Test Branch Self Self performs an internal self-test of the modem, which takes less than a minute to complete. The modem must be offline; otherwise, Invalid Command appears. WARNING When this test is run in Remote mode, it causes the Remote mode session to be lost.
Page 184 COMSPHERE 392xPlus Modems Loc Analog Loop Loc Analog Loop performs a local analog loopback (ITU-T V.54 Loop 3), Figure 8-1, that verifies modem operation as well as the connection between the DTE and modem. The modem must be offline and in Synchronous or Asynchronous Direct mode to perform this test, otherwise Invalid Command appears.
Page 185 Test Branch NOTE The test delays 15 to 30 seconds to allow any outstanding network management messages to propagate before the VF channel is interrupted by the test. The message Started appears on the LCD, and the Test LED lights for the duration of the test. If OtherTestActive appears on the LCD, another test is in progress.
Page 186 COMSPHERE 392xPlus Modems To access Rem_Digital_Loop from the Test branch, make the following selections: Test: Rem_Digital_Loop Press the key until Rem_Digital_Loop appears. Press any function key to start this test. Pick Test Port > Port1 Port2 Select the appropriate port by pressing the corresponding function key. Press the key to scroll other ports into view.
Page 187 Test Branch Loc Digital Loop Loc Digital Loop is issued by a local modem and forces it to loopback any data received from the remote modem (Figure 8-3). (This test operates the same as a ITU-T V.54 Loop 2 except it is issued at your modem.) This is useful if a remote modem is incapable of initiating a remote digital loopback from its location.
Page 188 COMSPHERE 392xPlus Modems This screen does not appear in Singleport mode. Test:P1:Dig Loop Started The message Started appears on the LCD and the Test LED lights. The port field (for example, P1 for Port 1) displays the port that is currently selected. You may see P1, P2, P3, or P4. If OtherTestActive appears on the LCD, another test is in progress.
Page 189 Test Branch Figure 8-5. Pattern Test and Digital Loopback Test Figure 8-6. End-to-End Pattern Test To access Pattern from the Test branch, make the following selections: Test: < Pattern Press the key until Pattern appears. Select Pattern to start this test. Pick Test Port >...
Page 190 COMSPHERE 392xPlus Modems Select the appropriate port by pressing the corresponding F key. Press the key to scroll other ports into view. The Pick Test Port screen does not appear in Singleport mode. Test:P1:Pattern Started The message Started appears on the LCD and the Test LED lights. The port field (for example, P1 for Port 1) displays the port that is currently selected.
Page 191 Sub-Network Health and Status Branch Sub-Network Health and Status Branch ......Sub-Network Health and Status Branch The Sub-Network Health and Status (SubHS) function is not available on multipoint tributary modems or with certain modulations (V.29, V.33, V.22bis, and V.27bis).
Page 192 COMSPHERE 392xPlus Modems Press the key until SubHS appears. Select SubHS. NOTE If there are no modems in the poll list, the message Poll List Empty! appears on the second line of the LCD. Sub-network HS yyyyyy When you select SubHS, Displays the network management address of the downstream modem selected.
Page 193: Call Setup Branch
Call Setup Branch Call Setup Branch ..........10-1 Dial .
Page 194: Dial
COMSPHERE 392xPlus Modems “Status” Status Configure PList Control Test SubHS Tlk/Data Security Remote Call_Setup (Dial Backup only) Change_Directory Dial Answer Dial_Standby Directory_Status Disconnect (Does not appear Return_to_Dial in North America) Directory Locations 1 - 24 To access the Call Setup branch from the Top-Level menu, make the following selections: Leased:33.6 Call_Setup Press the...
Page 195 Call Setup Branch Select Dial to display the first directory telephone number. DialDirectory: 01:5551234 To view other directory locations, select Nxt. DialDirectory: 02:3219876 Once the directory location you want appears on the LCD, press the F2 or F3 key to dial the number.
Page 196: Disconnect
COMSPHERE 392xPlus Modems Disconnect For dial backup applications, use this function when you want to disconnect an established call on a dial line. For leased backup applications, use this function to switch between the primary leased line and the backup leased line. To access Disconnect from the Call Setup branch, make the following selection: Call Setup: >...
Page 197: Answer
Call Setup Branch Answer For dial backup applications, Answer allows the modem to go off-hook, generate an answer tone, and begin the handshaking process with the calling modem. Use the Answer function when the Auto-Answer Ring Count configuration option is disabled. (Refer to the Line Dialer section in Chapter 5, Configure Branch.) For leased backup applications, Answer allows the modem to begin a “handshake”...
Page 198: Dial Standby/Return To Dial
COMSPHERE 392xPlus Modems Under normal backup conditions, when a problem occurs on the primary leased line, the modems establish a connection over the backup network. Call Setup: Dial Standby When this occurs, the Dial Standby function appears on the LCD. If you select Dial Standby, the modem switches back to the primary leased-line while still maintaining the backup connection.
Page 199: Change Directory
Call Setup Branch If the modem is operating in a Dial Backup mode, the Dial Standby function forces the modem to primary leased-lines and the LCD displays the status message Command Complete. Once the modem is in Dial Standby mode, Return_to_Dial appears on the LCD. Selecting this function forces the modem to backup networks and the LCD displays the status message Command Complete.
Page 200: Entering Telephone Numbers And Dial Command Modifiers Into Directory Locations
COMSPHERE 392xPlus Modems Entering Telephone Numbers and Dial Command Modifiers into Directory Locations The following example uses an empty directory location for describing how to enter a telephone number. If you want to change an existing telephone number in any of the 24 directory locations, follow the same procedures.
Page 201 Call Setup Branch Table 10-1 Valid Dial Command Modifiers Dial command modifiers are parameters entered in the dial command string which specify how, when, and what number to dial. The following is a list of parameters the 392xPlus modems recognize: —...
Page 202: Directory Status (May Not Appear For Certain Countries)
COMSPHERE 392xPlus Modems Directory Status (may not appear for certain countries) Directory Status displays the status of each directory location. To access Directory Status from the Call Setup branch, make the following selections: Press the key until Directory_Status appears. Press any function key to select Directory_Status.
Page 203 Talk/Data Branch Talk/Data Branch ..........11-1 Manual Dialing When the Remote Modem is Configured for Auto-Answer...
Page 204 COMSPHERE 392xPlus Modems Manual Dialing When the Remote Modem is Configured for Auto-Answer NOTE On the remote modem, the Line Current Disconnect configuration option (refer to the Line Dialer section in Chapter 5, Configure Branch) must be set to Disable. This configuration option does not appear on Models 3920-A1-401, 411 and 3921-B1-001, 011.
Page 205 Talk/Data Branch Manual Dialing When the Remote Modem is Configured for Manual Answer NOTE On both modems, the Line Current Disconnect configuration option (refer to the Line Dialer section in Chapter 5, Configure Branch) must be set to Disable. If you are originating a call using a telephone and the remote modem is configured for Manual Answer, perform the following procedure.
Page 206 COMSPHERE 392xPlus Modems 11-4 October 1998 3920-A2-GH30-40...
Page 207: Overview
Dial Access Security Overview ........... . 12-1 Originate Access Security .
Page 208: Originate Access Security
COMSPHERE 392xPlus Modems The COMSPHERE 392xPlus modems use an outbound and inbound method of security known respectively as Originate Access and Answer Access security. Both methods of security require some type of password entry whether it be included as part of an AT command dial string or entered directly from a remote user’s DTE.
Page 209: Vf-Side Passwords
Dial Access Security VF-Side Passwords VF-side password entry occurs between modems prior to connecting. Once the VF-side password is entered, no other user intervention is required since security negotiation is handled solely by the modems. When the answering modem is configured for VF entry technique, it goes off-hook and transmits to the originating modem either a secondary dial tone or silence (this choice depends on how the VF Prompt Type option is configured).
Page 210: Dte-Side Passwords
COMSPHERE 392xPlus Modems DTE-Side Passwords DTE-side password entry requires the originating user to supply a valid password via the DTE. This method of password entry occurs after the modems’ training sequence, but before normal connection. The modems must be configured for asynchronous operation to use this type of security.
Page 211: Security Branch
Dial Access Security Security Branch The Security branch of the Top-Level menu allows you to change and save parameters that are critical to the dial access security password database. This database is a collection of passwords and their associated parameters that determine how the modems control password access. Most of the functions within this branch are protected by an Administrative Password.
Page 212: Set Access Ctrl
COMSPHERE 392xPlus Modems Set Access Ctrl Set Access Control allows you to configure critical parameters contained within the security database table that control dial access security. These parameters are protected by an Administrative Password, which is an 8-digit decimal number. Set Access Control contains the Edit Password Table, Set Answer Security, Set Originate Security, and Set Administrative Password security configuration groups.
Page 213: Editpasswdtable
Dial Access Security Press the key to scroll the Set Answer Security, Set Originate Security, and Set Administrative Password groups into view. If an incorrect administrative password is entered, then the message PassWrd Invalid appears as well as the last password entered. Enter the correct password value or press the key to exit the Security branch.
Page 214 COMSPHERE 392xPlus Modems Select Index "0001 Select Index appears. Press the F2 ( " ) key to increment index values. Press the key to move the cursor to the next position. Continue this sequence until the desired index appears, and then press the F1 key to select Ent. If an index outside of the range is entered, the message Index Too Big appears.
Page 215 Dial Access Security Table 12-1 describes the settings of the Edit Table Password group options. Table 12-1 Edit Password Table Group Options PsWdType xxxx Nxt Cleared DTE_Entry VF_Entry VF_plus_DTE Password Type. Indicates whether this index location is configured for VF-side password, DTE-side password, or both. Cleared displays for an index location that contains no valid entry.
Page 216: Set Answer Sec
COMSPHERE 392xPlus Modems Set Answer Sec Set Answer Security determines if dial access security is enabled or disabled. This method of inbound security is configured in the answering modem. Although this also appears under the Security Configuration Option group, it can only be changed from the Set Answer Sec LCD display in the Security branch.
Page 217: Set Orig Sec
Dial Access Security Set Orig Sec Set Originate Security controls whether or not the modem can originate a call using AT commands when the dial access security feature is installed. This method of outbound security only applies to modems originating a call. To access Set_Orig_Sec from Set Access Ctrl, make the following selections: Set Access Ctrl Set_Orig_Sec...
Page 218: Set Admin Pswd
COMSPHERE 392xPlus Modems Set Admin PsWd Set Administrative Password is used to change the Administrative Password value. The Administrative Password is an 8-digit decimal number that allows authorized users to enter the Access Security Control function. NOTE If this value is forgotten, then the only way to access any of the security functions is by selecting Reset Security.
Page 219: Reset Security
Dial Access Security Reset Security Reset Security is the second major function within the Security branch of the Top-Level menu. It erases all contents of the security database table and resets all index locations to Cleared. Two selections appear under Reset Security: Abort Security Reset and Erase All PassWords. Use Reset Security if you want to redo the entire security database table.
Page 220: Security Configuration Options
COMSPHERE 392xPlus Modems This concludes the description of the functions found in the Security branch of the Top-Level menu tree. The following section describes the security configuration options found within the Configure branch of the Top-Level menu tree. Security Configuration Options The Security Configuration Options group allows you to view and set dial access security parameters.
Page 221 Dial Access Security Table 12-4 (2 of 3) Security Configuration Options DTE_PW_TermChar: 013 Nxt " 013 This configuration option does not appear if Answer Security Mode is configured for No_Answ_Sec. DTE Password Termination Character. Allows you to change the ASCII character used to indicate the end of a password or User ID entered by an originating user.
Page 222: Security Password Entry Techniques
COMSPHERE 392xPlus Modems Table 12-4 (3 of 3) Security Configuration Options Originate_Secur: No_OrigSec End No_OrigSec Ena_Orig_Sec Originate Security Mode. This configuration option is read-only and cannot be changed from the Configuration branch. The setting of this configuration option can only be changed in the Set Orig Sec group found in the Security branch. No Originate Security –...
Page 223: Originate Access Password
Dial Access Security NOTE While pulse dial can be used to originate the call, DTMF tones must be used for the password. This can be accomplished by using the P and T modifiers appropriately. Refer to the Dial command in Chapter 14, AT Command Set and S-Registers, for more on...
Page 224: Database Table Examples
COMSPHERE 392xPlus Modems Database Table Examples The following examples illustrate possible database tables in which the password type is configured for VF Entry, DTE Entry or a combination of VF, DTE, and VF plus DTE Entry. These tables are shown for illustrative purposes only. Passwords shown are not representative of good password selections.
Page 225: Security Database Table Using Both Vf-Side And Dte-Side Passwords
Dial Access Security Table 12-7 is an example of a security database table that uses a mixture of VF and DTE passwords. Table 12-7 Security Database Table Using Both VF-Side and DTE-Side Passwords VF and DTE Passwords Index Password Type Assigned to VF_Entry Denver office*...
Page 226 COMSPHERE 392xPlus Modems This page intentionally left blank. 12-20 October 1998 3920-A2-GH30-40...
Page 227 Dial Access Security NOTE This page is self-supporting and can be removed for security reasons. 00282600 The following provides instructions to clear the dial access security alarm light from the modem’s front panel: Press the key to return to the Top-Level menu. Press F1 to access the Status branch.
Page 228 COMSPHERE 392xPlus Modems 12-22 October 1998 3920-A2-GH30-40...
Page 229: Remote Branch
Remote Branch Remote Branch ..........13-1 Remote Branch The Remote branch of the Top-Level menu allows you to control the remote modem’s DCP...
Page 230 COMSPHERE 392xPlus Modems The following conditions must be met before using the Remote branch: • A connection using either leased lines or the dial network must be established. • The Access from the Remote configuration option must be enabled in the remote modem. •...
Page 231 Remote Branch For Trellis Multipoint (TMp) control modems, you must specify the network management address of a tributary modem. The following display does not appear in point-to-point or Trellis Multipoint tributary modems. Choose Address: "xxx The address field (xxx) displays the network management address of the modem to be accessed by the Remote function.
Page 232 COMSPHERE 392xPlus Modems displays and press any function key. Primary channel operation is not available when initiating a Remote function from a TMp tributary modem. Leased:33.6 Control ExitRem If the remote modem accepts the password and the entry is successful, the Top-Level menu of the remote modem appears on the local modem’s LCD.
Page 233: Command And Data Modes
AT Command Set and S-Registers Overview ........... . 14-1 Command and Data Modes .
Page 234: Escape Sequence And Escape Guard Time
COMSPHERE 392xPlus Modems Escape Sequence and Escape Guard Time The escape sequence is only issued when the modem is online and in Data mode. The 392xPlus modems use three consecutive plus ( + ) characters as the escape sequence. (To change this value, refer to S-Register S2 discussed later in Table 14-3 in the S-Register Format section.)
Page 235: Result Codes
AT Command Set and S-Registers Result Codes Table 14-1 lists all valid result codes for the 392xPlus modems. Table 14-1 (1 of 3) Result Codes Numbers Numbers Word Description Command executed CONNECT Modem connected to line RING Modem receiving a ring voltage from the VF line NO CARRIER Modem lost carrier signal, does not detect carrier signal, or does not detect answer tone...
Page 236 COMSPHERE 392xPlus Modems Table 14-1 (2 of 3) Result Codes Numbers Numbers Word Description CONNECT 9600/ EC** Connection at 9600 bps with error control CONNECT 12000/ EC** Connection at 12,000 bps with error control CONNECT 14400/ EC** Connection at 14,400 bps with error control CONNECT 16800/ EC** Connection at 16,800 bps with error control CONNECT 7200/ EC**...
Page 237: At Command List
AT Command Set and S-Registers Table 14-1 (3 of 3) Result Codes Numbers Numbers Word Description CONNECT 33600* Connection at 33,600 bps CONNECT 21600/ EC** Connection at 21,600 bps with error control CONNECT 24000/ EC** Connection at 24,000 bps with error control CONNECT 26400/ EC** Connection at 26,400 bps with error control CONNECT 28800/ EC**...
Page 238 COMSPHERE 392xPlus Modems Table 14-2 (1 of 10) 392xPlus AT Commands DCP LCD Description Command Command Sequence Repeat Last Command. Reexecutes last command string. (Not to be preceded Call Setup\ with AT or followed by pressing the Return key.) Answer Answer Mode.
Page 239 AT Command Set and S-Registers Table 14-2 (2 of 10) 392xPlus AT Commands DCP LCD Command Description Command Sequence DS=n Dial Stored Number. Dials the number stored in Location n (1–24). (To store a Call Setup\Dial\ telephone number, refer to the &Zn=x command.) Dial Directory Command Character Echo.
Page 240 COMSPHERE 392xPlus Modems Table 14-2 (3 of 10) 392xPlus AT Commands DCP LCD Command Description Command Sequence Extended Result Code, Dial Tone Detect, and Busy Tone Detect Configuration Extended Result Options. Code: Configure\Edit\ Extended Dial Tone Busy Tone DTE Dialer Result Code: Detect: Detect:...
Page 241 AT Command Set and S-Registers Table 14-2 (4 of 10) 392xPlus AT Commands DCP LCD Command Description Command Sequence &Cn LSD Control. Configure\Edit\ DTE Interface &C0 Forced On. LSD ON at all times. &C1 Standard RS232. LSD is ON when the remote modem’s carrier signal is detected.
Page 242 COMSPHERE 392xPlus Modems Table 14-2 (5 of 10) 392xPlus AT Commands DCP LCD Command Description Command Sequence &Gn V.22bis Guard Tone. Configure\Edit\ Dial Line &G0 Disable. &G1 550 Hz. &G2 1800 Hz. NOTE: The V.22bis Guard Tone cannot be disabled in some countries. &In Dial Transmit Level.
Page 243 AT Command Set and S-Registers Table 14-2 (6 of 10) 392xPlus AT Commands DCP LCD Command Description Command Sequence &Mn and Async/Sync Mode and DTE Dialer Type. Configure\Edit\ &Qn DTE Dialer &M0, &Q0 Modem operates in Asynchronous mode using AT Command protocol.
Page 244 COMSPHERE 392xPlus Modems Table 14-2 (7 of 10) 392xPlus AT Commands DCP LCD Command Description Command Sequence &Tn Tests. Test &T0 Abort. Stops any test in progress. &T4 and &T5: &T1 Local Analog Loop. Configure\Edit\ &T2 Pattern. Transmits and receives a 511 Bit Error Rate Test (BERT). Tests &T3 Local Digital Loopback test.
Page 245 AT Command Set and S-Registers Table 14-2 (8 of 10) 392xPlus AT Commands DCP LCD Command Description Command Sequence &Zn=x Store Telephone Numbers. Modem saves the telephone numbers and dial Call Setup\ command modifiers (if any) entered for x (up to 40 characters in length) in Change Directory Directory Location n (1–24).
Page 246 COMSPHERE 392xPlus Modems Table 14-2 (9 of 10) 392xPlus AT Commands DCP LCD Command Description Command Sequence Asynchronous Error Control Mode. Configure\Edit\ V42/MNP/Buffer Buffer Mode. Direct Mode. MNP or Disconnect. MNP or Buffer. V.42/MNP or Disconnect. V.42/MNP or Buffer. LAPM or Disconnect. LAPM or Buffer.
Page 247 AT Command Set and S-Registers Table 14-2 (10 of 10) 392xPlus AT Commands DCP LCD Command Description Command Sequence Synchronous Flow Control of DTE. Configure\Edit\ V42/MNP/Buffer No flow control. Flow control using transmit clock (circuit 114). Flow control using CTS (circuit 106). #SCn Synchronous Data Compression Mode.
Page 248: S-Register List
COMSPHERE 392xPlus Modems S-Register List S-Registers affect the operating parameters of the 392xPlus modems. S-Registers are only applicable when the DTE Dialer Type configuration option is set for AT. (Refer to the &Mn and &Qn commands.) Table 14-3 lists all S-Registers supported by the 392xPlus modems. The first column lists the S-Register.
Page 249 AT Command Set and S-Registers Table 14-3 (1 of 15) 392xPlus S-Registers DCP LCD S-Register Description Command Sequence Auto-Answer Ring Number . Register determines number of rings the modem Configure\Edit\ will count before automatically answering a call. Line Dialer Enter zero (0) if you do not want the modem to automatically answer any calls. Otherwise, enter a value from 1–255 for the number of rings to count before answering.
Page 250 COMSPHERE 392xPlus Modems Table 14-3 (2 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence Escape Guard Time. Register sets the value (in 20-millisecond increments) for Configure\Edit\ the required pause before and after the escape sequence is issued. The guard DTE Dialer time prevents the modem from interpreting data as the escape sequence characters.
Page 251 AT Command Set and S-Registers Table 14-3 (3 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence Proactive Retrain. Determines whether the modem automatically retrains if the Configure\Edit\ Signal to Noise ratio drops 1.2 dB. Dial Line Register has the following values: 0 = Enable 1 = Disable The factory setting is Enable.
Page 252 COMSPHERE 392xPlus Modems Table 14-3 (4 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence Port4 Ext Alarm. Register determines whether Port 4 is used to pass user data Configure\Edit\ or to monitor for external alarms. Interface\MUX Register has the following values: 0 = Disable 1 = EnableLow 4 = EnableHigh...
Page 253 AT Command Set and S-Registers Table 14-3 (5 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence Mixed Trib F/W. Mixed tributary firmware. Establishes that a multipoint network Configure\Edit\ has modems using mixed firmware (prior to and after Release M02.00xx). Misc Register has the following values: 0 = No...
Page 254 COMSPHERE 392xPlus Modems Table 14-3 (6 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence Dial Line Rate. Register determines the modem’s data rate and modulation Configure\Edit\ scheme for operation on dial lines. Dial Line Register has the following values: 1 = 14,400 (V.32bis) 2 = 12,000(V.32bis) 3 = 9600 (V.32bis)
Page 255 AT Command Set and S-Registers Table 14-3 (7 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence Leased-Line Rate. Register determines the modem’s data rate and modulation Configure\Edit\ scheme for operation on either 2-wire or 4-wire leased lines in either Answer Leased Line or Originate mode.
Page 256 COMSPHERE 392xPlus Modems Table 14-3 (8 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence Automatic Dial Backup. Register determines if the modem performs an Configure\Edit\ automatic dial backup if the leased lines fail. Leased Line Register has the following values: 0 = Disable 1 = Enable The factory setting is Disable.
Page 257 AT Command Set and S-Registers Table 14-3 (9 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence DTE LL (CT141). Register determines if the modem performs a local analog Configure\Edit\ loopback if it receives a CT141 signal from the DTE. Tests Register has the following values: 0 = Disable...
Page 258 COMSPHERE 392xPlus Modems Table 14-3 (10 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence CT111 Rate Control. Register determines if CT111 Rate is disabled, set for Configure\Edit\ Fallback 1 or Fallback 2. DTE Interface CT111 Rate allows the DTE to control modem rate via Pin 23 of the EIA-232-D interface.
Page 259 AT Command Set and S-Registers Table 14-3 (11 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence NMS Call Messages. Register determines if the modem sends information Configure\Edit\ regarding status (Call Progress) and/or sends summarized call statistics (Call Misc Connect) to the 6700 Series Network Management System (NMS).
Page 260 COMSPHERE 392xPlus Modems Table 14-3 (12 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence Network Position Identification. Register identifies each modem as either a Configure\Edit\ control or tributary modem. Misc Register has the following values: 0 = Tributary 1 = Control The factory setting is Tributary.
Page 261 AT Command Set and S-Registers Table 14-3 (13 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence AT Command Mode. Register determines how the modem responds to valid Configure\Edit\ and invalid AT commands. DTE Dialer Register has the following values: 0 = Normal 1 = No ERROR 2 = No Strap or ERROR...
Page 262 COMSPHERE 392xPlus Modems Table 14-3 (14 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence DTE Rate = VF. Register allows the DTE’s data rate to be equal to the VF Configure\Edit\ (telephone line) data rate. If Enabled, the data rate between the DTE and DTE Interface modem is the same as the modem’s VF data rate.
Page 263 AT Command Set and S-Registers Table 14-3 (15 of 15) 392xPlus S-Registers DCP LCD Command S-Register Description Sequence Trellis Multipoint (TMp) Tx Preemphasis. Provides amplification for Configure\Edit\ frequencies above the carrier frequency to compensate for high frequency line Leased attenuation. Register has the following values: 0 = Enable 1 = Disable...
Page 264 COMSPHERE 392xPlus Modems 14-32 October 1998 3920-A2-GH30-40...
Page 265: Menu Tree
Menu Tree Overview ........... . Overview Pages A-2 and A-3 provide a menu tree for the 392xPlus modems.
Page 266 COMSPHERE 392xPlus Modems Displays current status of modem along with "Status" data rate and error control mode. to next page Status Configure PList Ld EditArea frm: (Tributary only) Activ Display Clear Change Add Acquire Customer1 (Operating) Factory Active Active Customer2 Delete (Saved) Skip...
Page 267 Menu Tree (Singleport from previous page mode only) Control Test SubHS Call_Setup Tlk/Data Security Remote (Dial Backup Choose Address only) (TMp Control only) Dial Answer Change_Directory Choose Password (TMp only) Disconnect Dial_Standby Return_to_Dial Secondary Prim Directory Locations 1 – 24 (data blckd) (ExitRem appears instead of Remote when...
Page 268 COMSPHERE 392xPlus Modems October 1998 3920-A2-GH30-40...
Page 269: Troubleshooting
Troubleshooting Overview ........... . Overview This appendix points out basic problems that can occur when operating a 392xPlus modem.
Page 270: Leased-Line Operation
COMSPHERE 392xPlus Modems Table B-2 Leased-Line Operation Symptom Action The modems do not train-up on Verify that the correct cabling is used for your application. Refer to Chapter 2, leased lines. Modem Installation. Verify that one modem is configured for Answer mode and the other is configured for Originate mode.
Page 271 Troubleshooting Table B-4 Modem — DTE Connection Symptom Action The modem does not accept or echo Verify that the cable between the Async port of the DTE and the modem is a back AT commands. standard RS-232 cable. (Null modem cables, also known as crossover cables, do not work in this application.) Verify that the Command Character Echo configuration option is enabled.
Page 272 COMSPHERE 392xPlus Modems Table B-5 (1 of 2) Modem — VF Connection Symptom Action The modem does not receive a dial Attach a telephone directly to the telephone line to verify that a dial tone exists. tone. Make sure the VF line is connected to the modem’s rear jack labeled DIAL. The modem does not go off-hook Verify that the Auto Answer Ring Count configuration option is set to a value and answer an incoming call.
Page 273: Online Operation
Troubleshooting Table B-5 (2 of 2) Modem — VF Connection Symptom Action Intermittent disconnects, high error Perform an End-to-End test. Refer to Pattern located in Chapter 8, Test Branch. rates, or excessive retransmissions occur. The modem establishes and then You may have a poor VF connection. Try dialing again. disconnects the call.
Page 274 COMSPHERE 392xPlus Modems Table B-8 MUX Operation Symptom Action The MUX configuration option does The Dial Access Security feature is enabled. Verify that both the Answer and not appear under DTE Interface. Originate security options are disabled. Refer to sections Set Answer Sec Set Orig Sec in Chapter 12, Security.
Page 275 Pin Assignments Overview ........... . EIA-232-D Pin Assignments .
Page 276: Eia-232-D Pin Assignments
COMSPHERE 392xPlus Modems EIA-232-D Pin Assignments Table C-1 lists the EIA-232-D pin assignments for the modem. Table C-1 EIA-232-D Pin Assignments Signal Name ITU-T Circuit Function Circuit Source — — Shield Transmit Data Receive Data Request-to-Send Clear-to-Send Data Set Ready —...
Page 277: Pin Assignments
Pin Assignments VF Connector Pin Assignments Table C-2 lists the connector pin assignments for Model 3920Plus modular jacks as well as the pin assignments for the TELCO jacks. (See Figure C-1.) Table C-2 VF Connector Pin Assignments Type of Telco Jack Leased Dial 6-Pin...
Page 278 COMSPHERE 392xPlus Modems Auxiliary Cables Not Supplied To add an external telephone to your modem, use an external “Y” cable to connect the phone line to both the modem and the telephone (Figure C-2). Figure C-2. Wiring Diagram — “Y” Cable for External Telephone October 1998 3920-A2-GH30-40...
Page 279 Pin Assignments For 2-wire leased-line connections to a JM8 network interface, use an 8-position to 6-position crossover cable (Figure C-3) according to the following FCC requirements: “The RJ series of jacks should not be used for connecting data equipment to nonswitched private line networks —...
Page 280 COMSPHERE 392xPlus Modems To connect a Model 3920Plus port to another modem’s EIA-232-D interface, use a 25-pin crossover cable (Figure C-4). 25-POSITION 25-POSITION PLUG PIN NO. PLUG PIN NO. CT140 CT140 XTXC XTXC CT142 CT142 (TEST) (TEST) Figure C-4. Wiring Diagram — 25-Pin Crossover Cable October 1998 3920-A2-GH30-40...
Page 281 ITU-T V.25bis Dialing Command and Responses Overview ........... . Call Request Commands .
Page 282: Call Request Commands
COMSPHERE 392xPlus Modems Call Request Commands Call Request commands are issued from the DTE to the modem and are responsible for initiating dial calls. Call Request commands include Call Request with Number Provided (CRN) and Call Request with Stored Memory Address Provided (CRS). Call Request with Number Provided (CRN) The CRN command dials the telephone number entered from the DTE.
Page 283: Call Connecting (Cnx
ITU-T V.25bis Dialing Command and Responses NS is similar to the Common Operational Message Invalid Number and the result code ERROR. CB is similar to the Call Failure Messages Dial Line in Use and No Dial-Test and the result code ERROR.
Page 284: Connect Incoming Call (Cic
COMSPHERE 392xPlus Modems Connect Incoming Call (CIC) The CIC command forces the modem to cancel any DIC commands and answer an incoming call. This command is only valid when the DTE issues a DIC command. CIC must be issued within 10 seconds after sending a DIC.
Page 285: Request List Of Stored Numbers (Rln
ITU-T V.25bis Dialing Command and Responses Request List of Stored Numbers (RLN) The Request List of Stored Numbers (RLN) command displays telephone numbers stored in the modem’s directory location. If the RLN command is entered without specifying a directory location, then all directory locations and telephone numbers appear. If a directory location is entered, then only that telephone number appears.
Page 286: Command Response
COMSPHERE 392xPlus Modems Command Response A Command Response indicates that the command entered was a valid or invalid entry. Command Response includes Valid (VAL) and Invalid (INV). Valid (VAL) The VAL response indicates that the modem has accepted the V.25bis command issued by the DTE.
Page 287: V.25Bis Response Messages
ITU-T V.25bis Dialing Command and Responses Table D-1 (2 of 2) V.25bis Commands AT Command/ V.25bis Command Description S-Register Equivalent List Request Request to List Delayed Numbers NONE Request to List Forbidden Numbers NONE Request to List Stored Numbers NONE List Response List Delayed Numbers NONE...
Page 288 COMSPHERE 392xPlus Modems October 1998 3920-A2-GH30-40...
Page 289: Ascii Character Table
ASCII Character Table Overview ........... . Overview Table E-1 in this appendix provides the ASCII character table.
Page 290 COMSPHERE 392xPlus Modems Table E-1 (2 of 4) ASCII Characters Hexadecimal Decimal Control ASCII Value ASCII Value Character CTRL-W CTRL-X CTRL-Y CTRL-Z CTRL-[ CTRL-/ CTRL-] CTRL-|Ax CTRL-_ spacebar “ & ’ < October 1998 3920-A2-GH30-40...
Page 291 ASCII Character Table Table E-1 (3 of 4) ASCII Characters Hexadecimal Decimal Control ASCII Value ASCII Value Character > ‘ 3920-A2-GH30-40 October 1998...
Page 292 COMSPHERE 392xPlus Modems Table E-1 (4 of 4) ASCII Characters Hexadecimal Decimal Control ASCII Value ASCII Value Character delete October 1998 3920-A2-GH30-40...
Page 293: Default Configuration Options
Default Configuration Options Overview ........... . Overview Table F-1 lists the six sets of default (preset) configuration options, labeled Sync Leased, Async...
Page 294 COMSPHERE 392xPlus Modems Table F-1 (1 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings DTE Interface (Multiport mode) Sub-group MUX Mode TDM/MSD...
Page 295 Default Configuration Options Table F-1 (2 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Port Rate Sub-group (Cont’d) Rate at 14.4 K 14400 Port1 or 14400 Port1 or...
Page 296 COMSPHERE 392xPlus Modems Table F-1 (3 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Port EIA Sub-group (Cont’d) Forced On A CTS Control Standard RS232...
Page 297 Default Configuration Options Table F-1 (4 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings DTE Interface (Singleport mode Cont’d) CTS Control Standard RS232 Forced On...
Page 298 COMSPHERE 392xPlus Modems Table F-1 (5 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings DTE Dialer l (Cont’d) Enable F Enable F Enable F...
Page 299 Default Configuration Options Table F-1 (6 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Dial Line Dial Modulation V.34 V.34 V.34...
Page 300 COMSPHERE 392xPlus Modems Table F-1 (7 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Lease Line (Cont’d) Rate Auto Orig Disable Disable Disable...
Page 301 Default Configuration Options Table F-1 (8 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings V.42 / MNP / Buffer l Err Contrl Mode ††...
Page 302 COMSPHERE 392xPlus Modems Table F-1 (9 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings V.42 / MNP / Buffer (Cont’d) l SDC Delay Min †...
Page 303 Default Configuration Options Table F-1 (10 of 10) Factory Default Configuration Options Sync Leased Async Leased Async Dial UNIX Dial Sync Dial Configuration Default Default Default Default Default Default Option Settings Settings Settings Settings Settings Settings Misc (Cont’d) Network Management Address J Diagnostic (Modem...
Page 304 COMSPHERE 392xPlus Modems F-12 October 1998 3920-A2-GH30-40...
Page 305 Sample Configurations Overview ........... . Point-to-Point .
Page 306 COMSPHERE 392xPlus Modems Point-to-Point Figure G-1 shows a sample configuration for point-to-point applications. 28800(V34) 28800(V34) 9600 9600 (Sync) Leased 9600 3920Plus 3920Plus (Sync) 4800 9600 4800 (Sync) Cable 2 Cable 2 4800 (Sync) Cable 1 Cable 1 Cable 1 Cable 1 4800 Cable 1 Cable 1...
Page 307: Sample Configurations
Sample Configurations Sample Port Rate Table Port Port 1 Port 2 Port 3 Port 4 Rate 28.8K 9600 9600 4800 4800 24.0K 9600 Disable 4800 4800 19.2K 9600 Disable 4800 4800 16.8K 9600 Disable Disable 4800 14.4K 9600 Disable Disable 4800 12.0K Disable...
Page 308 COMSPHERE 392xPlus Modems Extended Point-to-Point Figure G-2 shows a sample configuration for extended point-to-point applications. 28800(V34) 28800(V34) 9600 9600 (Sync) 9600 Leased 3920Plus 3920Plus (Sync) 4800 9600 4800 (Sync) Cable 2 Cable 2 4800 (Sync) Cable 1 Cable 1 Cable 1 Cable 1 4800 Cable 1...
Page 309 Sample Configurations 3910 A Use Sync Leased (Answer) default configuration options with the following exceptions: Tx Clock Source Set to External. LeasedLine Rate Set to 4800(V32b). Autorate (Leased Line) Set to Disable. 3910 B Use Sync Leased (Originate) default configuration options with the following exceptions: Tx Clock Source Set to RXC_Loop.
Page 310 COMSPHERE 392xPlus Modems Extended Multipoint Figure G-3 shows a sample configuration for extended multipoint applications. 28800(V34) 28800(V34) 9600 9600 (Sync) Leased 9600 3920Plus 3920Plus (Sync) 4800 9600 4800 (Sync) Cable 2 Cable 2 4800 (Sync) Cable 1 Cable 1 Cable 1 Cable 1 4800 Cable 1...
Page 311 Sample Configurations Configuration Options 3920Plus A Use Sync Leased (Answer) default configuration options with the following exception: Rate Refer to Sample Port Rate Table in this section. 3920Plus B Use Sync Leased (Originate) default configuration options with the following exceptions: Tx Clock Source Set to RXC_Loop.
Page 312 COMSPHERE 392xPlus Modems Cables Cable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug) connector at one end to attach to the modem. Attach this to the connector labeled DTE1, 2, 3, or 4. Cable 2 Use part number 125-0053-1431 (an 8-position, 8-wire modular cord that is supplied with the modem).
Page 313 Sample Configurations Configuration Options 3920Plus A Use Sync Leased (Answer) default configuration options with the following exceptions: Auto Dial Back Set to Enable. Rate Refer to Sample Port Rate Table in this section. 3920Plus B Use Sync Leased (Originate) default configuration options with the following exceptions: Auto Dial Back Set to Enable.
Page 314 COMSPHERE 392xPlus Modems Point-to-Point with Network Management Figure G-5 shows a sample configuration for point-to-point applications with network management. 28800(V34) 28800(V34) 9600 9600 (Sync) Leased 9600 3920Plus 3920Plus (Sync) 4800 9600 4800 (Sync) Cable 2 Cable 2 3600- 4800 Hubbing (Sync) Device Cable 1...
Page 315 Sample Configurations Sample Port Rate Table Port Port 1 Port 2 Port 3 Port 4 Rate 28.8K 9600 9600 4800 4800 24.0K 9600 Disable 4800 4800 19.2K 9600 Disable 4800 4800 16.8K 9600 Disable Disable 4800 14.4K 9600 Disable Disable 4800 12.0K Disable...
Page 316 COMSPHERE 392xPlus Modems Carrier with Network Management Figure G-6 shows a sample configuration for COMSPHERE 3000 Series Carrier applications with network management. 28800(V34) 28800(V34) 9600 9600 (Sync) Leased 9600 3921Plus 3920Plus (Sync) 4800 9600 4800 (Sync) Cable 2 Cable 2 Circuit Card 4800...
Page 317 Sample Configurations Configuration Options 3921Plus A Use Sync Leased (Answer) default configuration options with the following exceptions: Rate Refer to the Sample Port Rate Table in this section. Diag Connection Set to NMS(CC). NetMngmtAddress Set to 1. 3920Plus B Use Sync Leased (Originate) default configuration options with the following exception: Rate Refer to the...
Page 318 COMSPHERE 392xPlus Modems Extended Diagnostics Figure G-7 shows a sample configuration for extended diagnostics. Figure G-7. Sample Configuration  Extended Diagnostics Configuration Options 3920Plus A Use Sync Leased (Answer) default configuration options with the following exceptions: NetworkPosition Set to Control. Diag Connection Set to NMS(CC).
Page 319 Sample Configurations 3920Plus C Use Sync Leased (Answer) default configuration options with the following exceptions: Tx Clock Source Set to External. Extended Channel Set Port 1 to Enable. Upstream Port # Set to Port 1. Diag Connection Set to Modem(DC). NetworkPosition Set to Control.
Page 320 COMSPHERE 392xPlus Modems Digital Bridging Figure G-8 shows a sample for Digital Bridging. Cable 1 14400(TMp) 19200(TMp) Addr = 1 (Sync) Cntrl Cable 2 Cable 2 3920Plus 3920Plus Addr = 2 (Sync) Cable 1 Cable 4 Addr = 3 Backup (Sync) Dial 3920Plus...
Page 321 Sample Configurations 3920Plus Use TMp Tributary template default configuration options with the following E, G exceptions: Port2 MSD Set to Enable. RTS Action Set to Sim_Cntl_Car. Auto Dial Back Set to Enable. Auto Dial Standby Set to Adv 15min. Dial Line Rate Set to 14400(V32).
Page 322 COMSPHERE 392xPlus Modems Point-to-Point MSD Figure G-9 shows a sample configuration for point-to-point MSD. Cable 1 Logical Addr = 1 Cable 1 (Sync) Channel Ports 1-3 MSD Addr = 2 (Sync) 19200 Leased 3920Plus 3920Plus 9600 Addr = 3 (Sync) (Sync) Port 4 TDM Addr = 4...
Page 323 Sample Configurations Sample Port Rate Table: Point-to-Point MSD 3920Plus A Port Port 1 Port 2 Port 3 Port 4 Rate 28.8K 19200 Disable Disable 9600 24.0K 14400 Disable Disable 9600 19.2K 9600 Disable Disable 9600 16.8K 4800 Disable Disable 9600 14.4K 4800 Disable...
Page 324 COMSPHERE 392xPlus Modems Multipoint MSD Figure G-10 shows a sample configuration for multipoint MSD. Addr = 1 (Sync) Addr = 2 (Sync) Addr = 3 (Sync) 19200 TMp 19200 TMp Addr = 4 (Sync) Leased 3920Plus 3920Plus Addr = 5 (Sync) Cable 1 Cable1...
Page 325 Sample Configurations Cables Cable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug) connector at one end to attach to the modem. Attach this to the connector labeled DTE1, 2, 3, or 4. Cable 2 Use part number 125-0053-1431 (an 8-position, 8-wire modular cord that is supplied with the modem).
Page 326 COMSPHERE 392xPlus Modems G-22 October 1998 3920-A2-GH30-40...
Page 327 ..........Overview The Paradyne proprietary Synchronous Data Compression (SDC) feature allows an increase of throughput in data transmission, and has an error correcting procedure so that transmitted data is less sensitive to channel disturbances.
Page 328: Synchronous Data Format
COMSPHERE 392xPlus Modems DATA ERROR COMPRESSION CORRECTION FUNCTION FUNCTION INTERCHANGE SIGNAL CIRCUITS CONVERTER SYNCHRONOUS FUNCTION LINE CONTROL FUNCTION 495-14785 Figure H-2. Synchronous Data Compression Synchronous Data Format The SDC feature supports the HDLC and SDLC type protocols for synchronous DTE data. An HDLC frame is composed of an information field containing the data to transmit, plus an overhead (address, control, and FCS fields) used by the DTE protocol.
Page 329: Synchronous Data Compression
Synchronous Data Compression DTE and DCE Frames Data exchanged between the local and remote DCEs is according to the LAPM protocol. The structure of a LAPM frame (DCE frame) is identical to the HDLC frame. The data from the DTE is compressed into the information field of the DCE frame.
Page 330: Data Synchronization
COMSPHERE 392xPlus Modems Data Synchronization Data exchanged between the synchronous DTE and the modem is synchronized by two clock signals. Data coming from the DTE is synchronized by the transmit clock and data received by the DTE is synchronized by the receive clock. The transmit clock is provided by the modem on circuit 114 or by the synchronous DTE on circuit 113.
Page 331: Flow Control Method
Synchronous Data Compression Flow Control Method The data transmitted from the DTE is sent to the DCE at a rate determined by the transmit clock frequency. When SDC is active, this data is then compressed in the DCE and sent to the remote DCE at the line rate less than the the rate between the DTE and DCE (usually twice, three, or four times less).
Page 332: Tuning Sdc Efficiency
COMSPHERE 392xPlus Modems Tuning SDC Efficiency SDC efficiency is dependent on the configuration parameters of the DTE and the modem. DTE Configuration The way DTE parameters are changed, and whether they can be changed, depends on your DTE. See the documentation that came with your DTE. DTE rate configuration parameter.
Page 333: Sdc Negotiation
Synchronous Data Compression SDC Negotiation The use of the synchronous data compression function and the value of the associated parameters is negotiated at link establishment via a protocol. The three associated parameters have the same meaning as those used for asynchronous data compression: •...
Page 334 COMSPHERE 392xPlus Modems October 1998 3920-A2-GH30-40...
Page 335: Equipment List
Equipment List Feature/ Equipment Part Number Model 3920Plus 3920-A1-XXX 3920-A2-XXX Model 3921Plus 3921-B1-XXX 6-position, 4-wire modular cord, 7-foot length 125-0067-0031 8-position, 8-wire modular cord, 14-foot length 125-0053-1431 Universal Power Supply (3920-A1-xxx) 327-0074-XXXX Unregulated 100-vac Power Supply (3920-A2-xxx) 327-0086-0131 Unregulated 110-vac Power Supply (3920-A2-xxx) 327-0073-0131 Unregulated 230-vac Power Supply (3920-A2-xxx) 327-0096-0131...
Page 336 COMSPHERE 392xPlus Modems October 1998 3920-A2-GH30-40...
Page 337: Glossary
Glossary Active (Operating) A configuration area containing configuration options currently in use by the modem. Any time a power cycle occurs or a reset is performed or a save is issued using the DCP, this area is updated with the contents of Active (Saved). Active (Saved) A nonvolatile configuration area containing the most recently saved configuration options.
Page 338 COMSPHERE 392xPlus Modems automatic dial backup When leased-line operation fails, this function forces the modem to dial the telephone number stored in directory location 1. automatic dial standby When operating in Dial Backup mode, this function forces the modem to periodically check the quality of the leased line.
Page 339 Glossary character echo A way to check the accuracy of data transmission by sending to the monitor (displaying) all the characters being transmitted. circuit pack lock A screw lock tab installed over a circuit card’s latch release tab to prevent the unit from being removed without a tool.
Page 340 COMSPHERE 392xPlus Modems Data mode A state where any entries made from the DTE are considered data and are transmitted and received between modems. Modems remain in Data mode until the connection is broken or until they are forced into online Command mode using the escape sequence. DB-25 connector A 25-pin connector that is used to connect a cable which enables communication between two devices.
Page 341 Glossary directory location Nonvolatile memory that stores up to ten telephone numbers. Each directory location can have up to 40 characters entered. Canadian Department of Communication. download A process that transfers modem firmware from a locally attached PC to a modem or allows the cloning of firmware from a local modem to a remote modem.
Page 342 COMSPHERE 392xPlus Modems function key Any one of three keys on the DCP that allows you to select or increment an LCD entry. Function keys are labeled F1, F2, and F3. half-duplex Two-way data communications allowed in only one direction at a time. handshaking The exchange of predetermined codes and signals (tones) to establish a connection between two modems.
Page 343 Glossary This protocol (Microcom Networking Protocol) detects and corrects data errors caused by telephone line noise and signal distortion. MNP5 includes data compression. modem (Modulator/DEModulator). A device that transforms signals from digital to analog form and vice versa. modulation The process of varying some characteristics (usually amplitude, frequency, and/or phase) of a carrier wave to form data transmissions.
Page 344 COMSPHERE 392xPlus Modems phase jitter A rapid or repeated shifting of the relative phase of a signal resulting in unwanted distortion. physical address The diagnostic address of a control modem derived from its location in the carrier: its carrier and slot number. point-to-point line A line or circuit connecting two stations.
Page 345 A process where two modems try to establish a connection over the VF line. trellis-coded modulation A modulation scheme developed by Paradyne which uses Forward Error Correction for multipoint and high-speed point-to-point applications. tributary modem Tributary modems in a network receive data from the control modem, as well as from the network management system in the network.
Page 346 V.32terbo A modulation that adds the 19,200 bps and 16,800 bps data rates to the V.32bis data rates. It is a Paradyne proprietary modulation, not a ITU–T standard. V.34 A ITU–T standard for modems operating full-duplex with asynchronous or synchronous data over leased lines or dial networks at 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200, 16,800, 14,400, 12,000, 9600, 7200, 4800, or 2400 bps.
Page 347 Index Numbers AT commands allowing use, 5-45 2W Leased Line SQ Retrain, 5-27, 5-60 command list, 14-5–14-15 S-Register, 14-28 command mode, 14-1 data mode, 14-1 escape character, 5-46 response to invalid, 5-48 S-Register, 14-29 result codes, 14-3–14-5 Abort (test), 8-2 using commands, 14-1–14-2 ac power requirements, 1-13 AT escape character, 5-46...
Page 348 COMSPHERE 392xPlus Modems Bell compatibility, 1-14 103J, 5-53 COMSPHERE 3000 Series Carrier 212A, 5-53 Model 3921Plus installation and removal, 2-8–2-14 Bisync, 5-45, D-1 network interface module (NIM), 2-2, 7-7 Blind Dial Pause service line, 7-7–7-8 Multiport mode, 5-20 COMSPHERE 6700 Series NMS, 1-1 S-Register, 14-17 configuration options Singleport mode, 5-50...
Page 349 Index dial DTE Bridge. See digital bridging access security. See Security DTE Dialer configuration options group, 5-45 answering a call DTE Dialer Type, 5-45 auto-answer, 5-19, 5-49, 11-2 AT command, 14-11 manual answer, 5-19, 5-49, 10-5, 11-3 DTE Interface configuration options group AT command, 14-6 Multiport mode, 5-10 backup, 2-7, 7-7–7-8, 10-1, 10-5–10-7, B-2...
Page 350 COMSPHERE 392xPlus Modems faceplate, 1-4, 1-5, 3-2 keypad, 3-7–3-8 factory default configurations, 2-13, 5-2, F-2–F-7 loading, 14-9 Fast Disconnect Multiport mode, 5-20 S-Register, 14-29 LAPM, 5-64, 5-65 Singleport mode, 5-51 LCD (liquid crystal display) features, 1-7 description, 3-1, 3-6–3-7 firmware, Mixed Tributary menu structure, 3-9–3-10 Multiport mode, 5-34 messages, 3-10, 4-3–4-4, 4-14–4-15...
Page 351 Index loopback Multiport mode, 1-6, 1-10, 5-8 local analog, 8-4–8-5 configuration options local digital, 8-7–8-8 Dial Line, 5-22–5-24 remote digital, 8-5–8-6 DTE Interface, 5-10–5-18 loudness of speaker, 5-31, 5-73, 7-2, 14-7 leased line, 5-25–5-29 LSD Control Line Dialer, 5-19–5-21 AT command, 14-9 Misc, 5-31–5-36 Multiport mode, 5-16 Test, 5-30...
Page 352 COMSPHERE 392xPlus Modems Remote access password, 5-4–5-9, 5-31, 5-74, 13-2, 13-3, part numbers, 4-8 13-4 passwords S-Registers, 14-25 administrative, 12-6–12-7 branch, 3-9, 13-1–13-4 remote access, 5-4–5-9, 5-31, 5-74, 13-2, 13-3, 13-4 remote digital loopback test, 8-5–8-6 security, 12-3–12-4, 12-16–12-17 Repeat Last Command, 14-6 pattern test, 8-8–8-10 requirements Pause Time...
Page 353 Index Security status access messages, 3-13–3-14 backup, 4-13 branch, 3-9, 12-5–12-14 DTE, 4-9 configuration options, 12-14–12-16 modem, 4-3 database tables, 12-3, 12-4, 12-18–12-21 SDC, 4-10 passwords, 12-3–12-4, 12-16–12-17 V.34 rates, 4-11 singleport mode, 12-1 VF connection, 4-5 Special Status branch, 3-9, 4-1–4-18 Multiport mode, 5-32 status indicators (LEDs), 3-2–3-5 Singleport mode, 5-75...
Page 354 V.42/MNP/Buffer configuration options group, 5-64 Train Time V.42bis data compression, 5-65 Multiport mode, 5-23 AT command, 14-14 Singleport mode, 5-55 V.42t Paradyne proprietary SDC, 1-14 Trellis Multipoint (TMp), 7-11 V.54 Address Troubleshooting, B-1–B-6 Multiport mode, 5-30 Tx Clock Source S-Register, 14-25...

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Comsphere 3921plus

Paradyne COMSPHERE 3920Plus Technical Reference Manual

Table of Contents

1 Introduction

2 Modem Installation

3 Dcp Operation

4 Status Branch

5 Configure Branch

6 Poll List Branch

10 Call Setup Branch

12 Dial Access Security

14 At Command Set and S-Registers

D Itu-T V.25Bis Dialing Command and Responses

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