1. Manuals
  2. Brands
  3. Paradyne Manuals
  4. Network Hardware
  5. COMSPHERE 3550 Series
  6. User manual

Paradyne COMSPHERE 3550 Series User Manual

Data service units
Hide thumbs Also See for COMSPHERE 3550 Series:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Instruction and Installation Manual, Quick Reference Manual
COMSPHERE
3550 SERIES
DATA SERVICE UNITS
MODELS 3550 AND 3551
USER'S GUIDE
Document No. 3550-A2-GB20-40
July 1999

Advertisement

Table of Contents
loading

Related Manuals for Paradyne COMSPHERE 3550 Series

Summary of Contents for Paradyne COMSPHERE 3550 Series

  • Page 1 COMSPHERE 3550 SERIES DATA SERVICE UNITS MODELS 3550 AND 3551 USER’S GUIDE Document No. 3550-A2-GB20-40 July 1999...

  • Page 2: Document Feedback

    COMSPHERE 3550 Series Data Service Units COMSPHERE 3550 Series Data Service Units Models 3550 and 3551 User’s Guide 3550-A2-GB20-40 5th Edition (July 1999) Changes and enhancements to the product and to the information herein will be documented and issued as a new release.

  • Page 3: Important Safety Instructions

    Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of electric shock from lightning. – Do not use the telephone to report a gas leak in the vicinity of the leak. 3550-A2-GB20-40 July 1999 Safety Instructions...
  • Page 4 COMSPHERE 3550 Series Data Service Units Notices THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH THE LIMITS FOR A CLASS A DIGITAL DEVICE, PURSUANT TO PART 15 OF THE FCC RULES. THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A COMMERCIAL ENVIRONMENT.
  • Page 5 No repairs may be performed by the user. Should you experience difficulty with this equipment, refer to the Equipment Warranty and Support For Digital Data Service (DDS) installations, inform the local telephone company of the appropriate network channel interface code for the service you desire. 3550-A2-GB20-40 section of Chapter 1. Interface Data Rate Code...
  • Page 6 The DDS Service Order Number is 6.0Y. The jack configurations required are RJ48S for the Model 3550 DSU and RJ48T for the Model 3551. With an RJ48T configuration, you must specify the number of data lines you require. Refer to the V.32 DBM jack information.

  • Page 7: Table Of Contents

    Table of Contents Preface About Your DSU Installing the Model 3550 DSU Installing the Model 3551 DSU 3550-A2-GB20-40 About This Guide ......... .
  • Page 8 COMSPHERE 3550 Series Data Service Units Operating the DSU Configuring the Unit Appendix Glossary Index Overview ..........
  • Page 9 Figure Model 3550 Hardware Switch Location (shown without a TDM/Flex) Model 3550 Electrical Connection Model 3550 DSU NMS Connection Model 3550 DSU Dial (PSTN) Network Connection Model 3550 DSU DDS (LADS) Network Connection Addressing Example Installing Cables Model 3551 DSU Switch and Jumper Locations...
  • Page 10 COMSPHERE 3550 Series Data Service Units Table General Technical Specifications DSU Technical Specifications V.32 DBM Technical Specifications 2-Port TDM/Flex Technical Specifications Model 3550 DSU Switch Settings LADS Connection Distances Model 3551 DSU Switch Settings Model 3551 DSU Jumper Straps Identity Descriptions...

  • Page 11: Table Page

    Command Error Messages Dial Backup Error Messages C-10 TDM/Flex Error Messages Model 3550 – Digital (DDS) Network Connector Pin Assignments Model 3550 – Dial (Analog) Network Connector Pin Assignments 3600 Hubbing Device Pin Assignments 3600 Hubbing Device CC IN/DC OUT Jack Pin Assignments EIA-232/V.24 Connector Pin Assignments...
  • Page 12 COMSPHERE 3550 Series Data Service Units July 1999 3550-A2-GB20-40...

  • Page 13: Preface

    Two installation chapters are provided, one for the Model 3550 DSU and one for the Model 3551 DSU. Select the chapter that applies to your DSU. Refer to the following chapters or appendices, as needed.

  • Page 14: Related Documents

    COMSPHERE 3550 Series Data Service Units Related Documents Other product documentation includes the following: 3000-A2-GA31 COMSPHERE 3000 Series Carrier, Installation Manual 3000-A2-GB41 COMSPHERE – 48 Vdc Central Office Power Unit, Installation Guide 6700-A2-GB41 COMSPHERE 6700 Series Network Management System, User’s Guide, Security...

  • Page 15: About Your Dsu

    DSU and its orderable options are near the end of the chapter. Standard Features The Model 3550 or 3551 DSU offers the following features: Multispeed operation. The DSU operates at data rates of 2.4, 4.8, 9.6, 19.2, 38.4, and 56 kbps full-duplex over the digital data service (DDS) network.

  • Page 16: Optional Features

    Related Documents section of the Preface, which also provides information on how to order these documents. Optional Features The Model 3550 DSU can be ordered with the following optional features: V.32bis 14.4 kbps Dial Backup Module (DBM) Time Division Multiplexer (TDM/Flex) The Model 3551 DSU can be ordered with a V.32bis...

  • Page 17: Upgrades Available

    2-Port TDM/Flex The 2-port TDM/Flex is a separate circuit card that attaches to the Model 3550 DSU. It allows independent ports to share one standard digital point-to-point facility. The 2-port TDM/Flex provides the following features: Port capacity. This feature permits the DSU to operate as a digital sharing device and provides two independent ports.

  • Page 18: General Technical Specifications

    COMSPHERE 3550 Series Data Service Units Specifications APPROVALS FCC Part 15 FCC Part 68 3550 DSU 3551 DSU, 3000 Series Carrier Safety 3550 DSU 3551 DSU, 3000 Series Carrier Emissions Bell Canada AC POWER REQUIREMENTS 3550 DSU 3550 DSU with DBM...
  • Page 19 Specifications HEAT DISSIPATION (MAX.) AT 115 VAC 3550 DSU 3550 DSU with DBM 3550 DSU with 2-Port TDM/Flex 3551 DSU 3551 DSU with DBM 3000 Series Carrier (16 DSUs with DBMs plus SDU and fan module) PORT RATES NMS COMPATIBILITY...

  • Page 20: Dsu Technical Specifications

    COMSPHERE 3550 Series Data Service Units Specifications APPLICATION COMMUNICATION LINE DATA RATES Digital Services (DDS, ASDS) LADS When timing is external (provided by the DTE), the DTE’s clock must be within these ranges. DDS NETWORK INTERFACE 3550 DSU 3551 DSU...

  • Page 21: V.32 Dbm Technical Specifications

    2.4, 4.8, 9.6, 12, 14.4 kbps If Call Setup is set for Callback or Password security, then the device is compatible with a Model 3550 or 3551 V.32 DBM. If Call Setup is set for Alarm or None, then any V.32 modem can be used.

  • Page 22: Equipment Warranty And Support

    COMSPHERE 3550 Series Data Service Units 2-Port TDM/Flex Technical Specifications Specifications APPLICATION Multiplexing Digital sharing PORT SYNCHRONOUS RATES PORT ASYNCHRONOUS RATES PORT DTE INTERFACE 3550 DSU (2-port TDM/Flex) NMS SUPPORT Equipment Warranty and Support Contact your sales or service representative directly for any help needed.

  • Page 23: Installing The Model 3550 Dsu

    (DBU) DSU DTE connection Verification testing Although the Model 3550 DSU is designed for desk or table-top operation, you can order an ACCULINKr 3100 Series CSU wall-mount adapter if you want to mount the DSU on a wall, an equipment shelf, a 19-inch RS-310-C or 23-inch AT&T DATAPHONEr equipment...

  • Page 24: How To Change Hardware Straps

    The Model 3550 DSU has a switch located behind its diagnostic control panel (DCP). This switch contains two straps, one that controls the permissive or programmable connection when a DBM is installed, and one that controls the frame-to-signal grounds.

  • Page 25: Model 3550 Hardware Switch Location (Shown Without A Tdm/Flex)

    FRONT BEZEL SNAP TABS SWITCH 1 Figure 2-1. Model 3550 Hardware Switch Location (shown without a TDM/Flex) Switch Position Switch Setting (default) S1-1 S1-1 S1-2 (default) ON is to the rear as you face the front of the DSU. Off is to the front.

  • Page 26: Where To Place The Dsu

    COMSPHERE 3550 Series Data Service Units Where to Place the DSU As mentioned earlier, the DSU must be placed within 6 feet of a dedicated grounded ac outlet that is protected by a circuit breaker. The distance between the DSU and its DTE must be within EIA-232-D/V.24 limits, or V.35 limits if operating...

  • Page 27: Connecting To The Network

    NMS, one connects the DSU to the dial (or public switched telephone network – PSTN) network, and one connects the DSU to the DDS network. Follow the appropriate procedure when making your network connections. July 1999 Installing the Model 3550 DSU...

  • Page 28: Model 3550 Dsu Nms Connection

    CONNECTION LOW VOLTAGE AC POWER IN NMS (873A) Figure 2-3. Model 3550 DSU NMS Connection Connecting to the Dial (or PSTN) Network If your DSU is equipped with a V.32 DBM, refer to Figure 2-4 as you follow these steps.

  • Page 29: Model 3550 Dsu Dds (Lads) Network Connection

    If connecting the DSU to a LADS network, there are distance limitations that govern the use of DSUs on the network. Table 2-2 summarizes these limitations. Figure 2-5. Model 3550 DSU DDS (LADS) Network Connection July 1999 Installing the Model 3550 DSU...

  • Page 30: Addressing The Unit

    COMSPHERE 3550 Series Data Service Units Data Rate Data Rate (kbps) 20.0 mi (32.2 km) 19.4 mi (31.2 km) 15.2 mi (24.5 km) 19.2 11.8 mi (19.0 km) 38.4 11.2 mi (18.0 km) 9.2 mi (14.8 km) 9.2 mi (14.8 km) Power level is –10 dBm.

  • Page 31: Addressing Example

    Figure 2-6 shows an example of DSU and DBM addressing, as well as link-level network addressing. Refer to Chapter 4 network address. Figure 2-6. Addressing Example July 1999 Installing the Model 3550 DSU to learn how to set the DSU’s...

  • Page 32: Connecting The Dsu To A Dte

    COMSPHERE 3550 Series Data Service Units Connecting the DSU to a DTE The DSU’s rear panel has both a 25-pin EIA-232-D/ V.24 connector and a 34-pin ITU-T V.35 connector (used for higher operating speeds). You can use either interface. When the unit is equipped with a TDM/Flex, either of these interfaces can be used as Port 1.

  • Page 33: Verifying Operation And Testing Connections

    11. Select Displ (F1) to display the results of the test. Table 4-6 received from a Digital Test. 12. Press the July 1999 Installing the Model 3550 DSU key until ID appears. key until Network Addr appears. key until DT appears. key to move the blinking in Chapter 4 shows the information key to scroll through each result.

  • Page 34: Verifying Dbm Operation

    COMSPHERE 3550 Series Data Service Units Verifying DBM Operation If a DBM is installed, test the tributary DBM for dial tone, and verify that the DSU can place and receive calls. " Procedure 1. Select Bckup (F2). 2. Select Dial to establish a dialed call to the tributary.

  • Page 35: Installing The Model 3551 Dsu

    DTE cables. 3550-A2-GB20-40 ............

  • Page 36: Before You Begin

    COMSPHERE 3550 Series Data Service Units Before You Begin The COMSPHERE 3000 Series Carrier should already be installed properly and be operational, with a functioning shared diagnostic control panel (SDCP). An SDCP (installed in the carrier) is required for installation and maintenance of the Model 3551 DSU.

  • Page 37: Model 3551 Dsu Switch And Jumper Locations

    S1 1 S1-1 S1-2 ON is to the rear as you face the front of the DSU. Off is to the front. 3550-A2-GB20-40 Table 3-1 Model 3551 DSU Switch Settings Permissive V.32 DBM transmit output level of –9 dBm (default) Programmable V.32 DBM transmit level between –12 dBm and...

  • Page 38: Model 3551 Dsu Jumper Straps

    COMSPHERE 3550 Series Data Service Units Strap State of Designation Jumper Strap Left Left Left Right Table 3-2 Model 3551 DSU Jumper Straps Function V.35 Test Mode Indication: Left — Enables V.35 Test Mode Indication (Pins 1 and 2). This is the factory default.

  • Page 39: Installing The Dsu

    (Figure 3-2). After the initial installation, the DSU can be installed or de-installed by simply removing the DSU from the carrier. Figure 3-2. COMSPHERE 3000 Series Carrier, Rear View 3550-A2-GB20-40 " Procedure 1. At the rear of the carrier, set the tab on the rear connector plate into one of the slotted grooves on the carrier’s backplane.

  • Page 40: Model 3551 Dsu Installation And Circuit Pack Lock

    COMSPHERE 3550 Series Data Service Units 4. Using a Phillips screwdriver, loosen the screw holding the circuit pack lock and rotate the lock to the open position (Figure 3-3). Open the latch. 5. At the front of the carrier, hold the DSU vertically with the latch on its faceplate in the open position.
  • Page 41 V.35 adapter, then tighten the screws on each side of this connector. Figure 3-4. V.35 Adapter Plug Installation 3550-A2-GB20-40 8. The installed DSU is connected to the DDS network through the 50-pin connectors at the rear of the carrier. These interfaces are specified in the...

  • Page 42: Connecting To The Network

    COMSPHERE 3550 Series Data Service Units Power-Up Routine When power is applied, the DSU: Determines what options (DBM or TDM/Flex) are installed, if any. Runs a Device Test on itself and each of the installed options. During the tests, all indicators on the DCP light briefly and the message Power-Up Tests appears on the liquid crystal display (LCD).

  • Page 43: Connecting The Dsu To A Dte

    (Feature Number 3000-F1-510) is needed. This adapter provides the interface between the 25-pin V.35 D-type connector and a V.35 DTE cable. 3550-A2-GB20-40 Each DSU can be configured to use either interface (EIA-232 or V.35) independent of other DSUs in the carrier.

  • Page 44: Verifying Operation And Testing Connections

    COMSPHERE 3550 Series Data Service Units Tributary DSU Addressing Tributary DSU addresses are user-definable, but take care to ensure that their addresses are unique on a multipoint circuit. If two tributaries are assigned the same address, you will not be able to communicate with either one.

  • Page 45: To Connect The Sdcp To A Dsu

    1:01A to 1:02A in this example. (In our example, the previously accessed DSU was located in Slot 2 of Carrier 1.) 3550-A2-GB20-40 2. Press the Select key on the SDCP again. The SDCP accesses the DSU in Carrier 1, Slot 1.
  • Page 46 COMSPHERE 3550 Series Data Service Units Other Tests The following lists the tests available on your DSU. Refer to the Test Branch section of Chapter 4 for further test information, as well as more detail on how to configure and operate the DSU. Refer to determine how best to access each test.

  • Page 47: Operating The Dsu

    ..............Assigning an Address 3550-A2-GB20-40 Operating the DSU .

  • Page 48: Overview

    ..............Overview A 3550 Series DSU can be managed from its control panel or from the COMSPHEREr 6700 Series NMS. This chapter describes how to manage the DSU using the control panel.

  • Page 49: Keypad

    Keypad There are seven keys on the DCP of the standalone Model 3550, and eight on the SDCP for the carrier- mounted Model 3551 DSU. The additional key, the Select key, connects the SDCP to a specific DSU located in a specific carrier and slot within the carrier.

  • Page 50: Menu Structure

    COMSPHERE 3550 Series Data Service Units key returns you to the top-level menu, and terminates any work in progress. key returns you to the previous display, one level up from the current display. It can also be used to terminate a data entry display without making a change.

  • Page 51: Expanded Health And Status

    The DTE interface statuses are displayed in sets. Use key to scroll each set of lead statuses into view. 3550-A2-GB20-40 Circuit Quality Circuit Quality (CircQ) shows the level and quality of the signal being received from the network by the DBM.

  • Page 52: Backup Branch

    (DBU). The following sections explain dial backup operation. Dial Backup Operation The Model 3550 or 3551 DSU with dial backup capability can provide backup for a point-to-point circuit operating at 14.4 kbps or below. Appendix E shows some typical dial backup system configurations.

  • Page 53: Understanding Operating Modes

    DDS circuit must be back in service before automatic restoration is attempted: from 1 to 60 minutes (the default is 5 minutes). 3550-A2-GB20-40 TriesTimeOut – Specify the overall time limit during which a DBM will automatically attempt to establish a dial backup call: from 1 to 60 minutes (the default is 15 minutes).

  • Page 54: Backup Branch Menu Selections

    COMSPHERE 3550 Series Data Service Units Current Backup Backup Mode Command Idle Bkup Dial Standby Disc Dial Dial Backup DrBU External Backup ExtBU DrBU Manual Backup You can control each step of a backup attempt by following one of these procedures.

  • Page 55: Test Branch

    DSU. If a DBM is installed, the DBM must be in Idle mode, with no call in progress if you want to run a Device Test. 3550-A2-GB20-40 On power-up, the DSU sends out polls to determine whether a DBM is installed.

  • Page 56: Dte Loopback

    COMSPHERE 3550 Series Data Service Units NOTE To issue a Local Loopback to a tributary DSU , the DSU must have a DBM installed or a Conflict w/ Environ message will appear. The DBM is required to call the tributary and abort the Local Loopback.

  • Page 57: Digital Test Results

    DSU/DBM Rx TimOuts: Local DSU/DBM only Local refers to the test initiator. 3550-A2-GB20-40 transmits fixed packets (or blocks) of data between DSUs or DBMs When an End-to-End Test is run, diagnostic data may be disrupted. To view the results of the test, select Displ (Display) and press the in Table 4-4.

  • Page 58: Configuration Branch

    Note that if all LEDs are functioning, all the indicators on the Model 3550 DCP are flashing steadily. In a COMSPHERE 3000 Series Carrier, the indicators on the SDCP remain ON. The LCD on the DCP or SDCP alternately flashes solid blocks, moving from position to position on the display until the test is aborted.

  • Page 59: Selecting An Application Configuration

    2. Press the F1 key to select Opts (Configuration Options subbranch). The Load from screen appears. 3. Press the key to scroll the desired configuration into view. 3550-A2-GB20-40 NOTE By referencing the menu in Appendix A, you will see that pressing the key is more efficient if the unit is to operate on a multipoint circuit.

  • Page 60: Configuration Options

    COMSPHERE 3550 Series Data Service Units 5. Select Save (F1). The Save to screen appears. 6. Select Activ (F1). The selected application’s configuration is saved to the DSU’s Active operating area, and the Command Complete message appears. Configuration Options The Configuration Options (Opts) subbranch allows you to save, copy, and/or change configuration options.

  • Page 61: Poll List

    (identified via the Change Poll List function). 3. Press the F1 or F2 key to display additional addresses. 4. Press the key to return to the Poll List screen. 3550-A2-GB20-40 Changing the Poll List To change the poll list (e.g., add network address 3): " Procedure 1.

  • Page 62: Acquiring The Poll List

    COMSPHERE 3550 Series Data Service Units To delete a network address (e.g., 3) from the poll list: " Procedure C h n g P o l l L i s t : Activ Delet 1. Select Delet (F2). A d d r e s s : 2.

  • Page 63: Directory

    (the default is 1). For this example, assume that you are entering your first directory entry. 6. Select Load (F2). 3550-A2-GB20-40 The Directory entry appears on the first line; the cursor is positioned in the first position of the currently empty Directory.

  • Page 64: Directory Entry And Password Characters

    COMSPHERE 3550 Series Data Service Units 10. Press the key to return to the Enter Dir screen. 11. Press the F3 key to Save the entry. 12. Verify that the number was loaded by pressing the key again and selecting Load (F2).

  • Page 65: Control Branch

    When selected, the port’s lead activity is reflected in the DCP circuit designation status indicators (TXD, RXD, etc.) on the faceplate of the Model 3551 DSU, or on the DCP of the Model 3550 DSU. External Leads The External Leads (ExtL) selection allows you to display the state of four general-purpose leads on the EIA-232-D/V.24 Port 1 interface: Pins 12 and 13 for...

  • Page 66: Messages Branch

    COMSPHERE 3550 Series Data Service Units Symbol NOTES: Input leads A and B: Off ( ) when voltage on lead is less than +.8V. ON ( ) when voltage on lead is more than +2.2V. Output leads are either ON or Off:...
  • Page 67 Display only (no changes) S Control branch: Display External Leads only (no changes) The 3550 Series DSUs are shipped from the factory with the security level set to Unlock. When the DCP is locked, only the Local branch appears on the control DSU.
  • Page 68 COMSPHERE 3550 Series Data Service Units 4-22 July 1999 3550-A2-GB20-40...

  • Page 69: Configuring The Unit

    3550-A2-GB20-40 Configuring the Unit ..........

  • Page 70: Using The Dcp To Set Configuration Options

    COMSPHERE 3550 Series Data Service Units Once loaded, the following Edit/Save submenu appears: Edit / Save: SAVE DSU Press the key to scroll the following configuration option sets into view: DSU, Diagnostic (DSU, DBM, External DBU, and General), DBM, External DBU, General, Backup, MUX (Copy, Setup, and Ports), and Port Speed (DSU, DBM, and External DBU).
  • Page 71 NonD, change DTE Port under the General option set from EIA232 to V.35, then save the changes to the Usr1 area, and return to the main or top-level menu. 3550-A2-GB20-40 " Procedure Press the DCP keys indicated by the shading.
  • Page 72 COMSPHERE 3550 Series Data Service Units Edit / Save: SAVE DSU Diag Chang Diag Opts: Diag Type: Disr Next NonD Disr Diag Type: NonD Next NonD Disr Chang Diag Opts: Edit / Save: SAVE DSU Diag Edit / Save: Diag...

  • Page 73: Configuration Option Tables

    (Table 5-5) DBM Configuration Options (Table External DBU Configuration Options General Configuration Options Backup Configuration Options 3550-A2-GB20-40 MUX (Setup) Configuration Options MUX (Port) Configuration Options Port Speed (DSU) Configuration Options for DSU (Table Port Speed (DBM) Configuration Options (Table Port Speed (External DBU) Configuration Options...

  • Page 74: Dsu Configuration Options

    COMSPHERE 3550 Series Data Service Units Rate(Kbps): 9.6 Next 38.4 19.2 DSU Rate . Sets the data rate (in kbps) of the DSU, which must be set to match the speed of the digital (DDS) circuit. — Select for 64 kbps LADS operation.
  • Page 75 Enab — Select enable if the DTE generates V.54 loopback sequences, or if the DSU is communicating with a DSU that is not a Model 3550 or 3551 that supports V.54 signaling. Disab — Select disable if the DTE does not support V.54 loopback sequences, or the other DSUs do not support V.54 signaling.

  • Page 76: Diagnostic (Dsu) Configuration Options

    COMSPHERE 3550 Series Data Service Units Diagnostic (DSU) Configuration Options Diag Type: Disr Next NonD Disr Mixed Diagnostic Type . This configuration option defines the diagnostic interaction between control and tributary DSUs. All DSUs on the same circuit should be set the same (e.g., if the control is set to NonD, all its tributaries should also be set to NonD).

  • Page 77: Diagnostic (Dbm) Configuration Options

    If the DBM Rate(Kbps) is equal to Port Speed, or if the underspeed port speed and sum of the TDM/Flex ports is equal to the aggregate speed on the DBM: 12.0 14.4 3550-A2-GB20-40 Table 5-3 None Prev 1200 1600 Prev...

  • Page 78: Diagnostic (External Dbu) Configuration Options

    COMSPHERE 3550 Series Data Service Units Diagnostic (External DBU) Configuration Options Diag Type: Disr Next Disr None Prev Diagnostic Type . This configuration option defines the diagnostic interaction between control and tributary DSUs that are in backup using an external dial backup unit (DBU). All DSUs on the same circuit should be set the same (e.g., if the control is set to Disr, all its tributaries should also be set to Disr).
  • Page 79 ( Diag Type is set to NonD) and a symmetrical port speed is required for proper DTE operation. Disab — When disabled, the receive port rate on the control will be the DDS rate, and the transmitter will be the port rate, minus the diagnostics. 3550-A2-GB20-40 Table 5-5 (2 of 2) Prev Prev July 1999...

  • Page 80: Dbm Configuration Options

    COMSPHERE 3550 Series Data Service Units Rate(Kbps): 9.6 Next 14.4 12.0 DBM Rate . Sets the initial data rate (in kbps) of the DBM for backup calls over the dial circuit. 14.4 to — Select the data rate for V.32bis modulation. The rate 14.4 is not displayed if you have a 12.0 kbps DBM.
  • Page 81 Select enable when interfacing with a DCE that receives clock from its own network source and does not support a Transmit Elastic Store. Disab — Select disable if you do not have an extended network. 3550-A2-GB20-40 Table 5-6 (2 of 4) DBM Configuration Options July 1999...
  • Page 82 None — Select for outgoing calls when no security is needed. If a Model 3550 or 3551 DBM calls, the unit automatically switches to Dial Backup mode. If a non-Model 3550 or 3551 DBM calls, the unit remains in Standby mode for 15 seconds before switching to Dial Backup mode.
  • Page 83 DBM when DTR is raised. It drops the call when DTR goes low or will not answer an incoming call if DTR is low. Disab — Select to disable DTR Call Control; the state of the DTR lead is ignored. 3550-A2-GB20-40 Table 5-6 (4 of 4) DBM Configuration Options July 1999...

  • Page 84: External Dbu Configuration Options

    COMSPHERE 3550 Series Data Service Units ExtBU: None Next Ansr Orig None External Backup Unit . This feature allows dial backup for a DSU using an external dial backup unit (DBU). Ansr — Select for the external DBU to answer an incoming dial backup call.

  • Page 85: General Configuration Options

    Antistreaming only takes effect when RTS Cntrl is set to DTE; it is disabled when RTS Cntrl is set to FrcOn. Chang — Set timer to any value from 1 to 100 second(s), in increments of 1; or to Disab when streaming terminal detection is not needed. 3550-A2-GB20-40 Table 5-8 (1 of 4) General Configuration Options...
  • Page 86 COMSPHERE 3550 Series Data Service Units LSD Lead: Std Next Delay FrcOn Line Signal Detect Lead (only displayed when Full Mode is enabled). Controls behavior of the LSD lead. — Select standard so that the LSD lead goes Off when a control mode idle (CMI) signal is received from the DDS network, or there is a DDS failure.
  • Page 87 Select if a change in state of a general-purpose lead signals CCN to the NMS. Disab — Select if changes to the lead state do not set a CCN event. 3550-A2-GB20-40 Table 5-8 (3 of 4) General Configuration Options Prev...
  • Page 88 COMSPHERE 3550 Series Data Service Units DTR Alarm: Disab Next Enab Disab Prev Data Terminal Ready Alarm (only displayed when Full Mode is enabled, and a TDM/Flex is not installed). Causes the DSU to generate an alarm if DTR is Off for more than 30 seconds. The DCP displays DTR Alarm and reports the alarm to the NMS.

  • Page 89: Backup Configuration Options

    Select to enter or change the current settings, which can range from 1 second to 30 minutes. The cursor has two positions: a minutes field with a range of 0 to 29, and a seconds field with a range of 00 to 59. 3550-A2-GB20-40 Table 5-9...
  • Page 90 COMSPHERE 3550 Series Data Service Units RestorTimOut: 5m Next Chang Prev Restoration Time-out (only displayed when Full Mode is enabled). Specifies the length of time the DDS network must be back in service before automatic restoration is attempted. ( Auto Restor must be enabled.) Chang —...

  • Page 91: Mux (Setup) Configuration Options

    Select to configure the port as asynchronous (asynchronous-to-synchronous conversion takes place). Disab — Select to configure the port as synchronous. * The menu paths for Prt1 and Prt2 are identical. 3550-A2-GB20-40 Table 5-10 MUX (Setup) Configuration Options Table 5-11 (1 of 4)
  • Page 92 COMSPHERE 3550 Series Data Service Units Async Rate: =Sync Next =Sync 1800 1200 Asynchronous Rate . Specifies the rate of an asynchronous port. The asynchronous rate must be less than or equal to the synchronous data rate of the port. Set the synchronous data rate for a port via the Port Speed (PrtSp) configuration submenu.
  • Page 93 — Select to enable the PCC Buffer feature. Disab — Select to disable the PCC Buffer feature. * The menu paths for Prt1 and Prt2 are identical. 3550-A2-GB20-40 Table 5-11 (3 of 4) MUX (Port) Configuration Options* Prev July 1999...
  • Page 94 COMSPHERE 3550 Series Data Service Units Elast Stor: Disab Next Enab Disab Prev Elastic Store (only displayed when Full Mode is enabled). Elastic Store hardware consists of a transmit buffer (register). Serial data from the extended circuit is clocked into the DSU elastic store using a clock provided by the extended circuit received clock lead.

  • Page 95: Port Speed (Dsu) Configuration Options

    DSD when calculating used bandwidth. Disab — No port runs underspeed during primary operation. Prt1 or — Selected port runs underspeed during primary operation. Prt2 3550-A2-GB20-40 Table 5-12 Disab Disab Prev July 1999 Configuring the Unit Prev...

  • Page 96: Port Speed (Dbm) Configuration Options

    COMSPHERE 3550 Series Data Service Units Port Speed (DBM) Configuration Options Prt1( 9.6): 9.6 Next 14.4 12.0 Port 1 Speed . Primary data rate in kbps on Port 1. (Must be set to the same value in the remote DBM.) 14.4 to —...

  • Page 97: Port Speed (External Dbu) Configuration Options

    DSD when calculating used bandwidth. Disab — Select if no port is to run underspeed during primary operation. Prt1 or — Select the port to run underspeed during primary operation. Prt2 3550-A2-GB20-40 Table 5-14 19.2 14.4 19.2 14.4 Prev...
  • Page 98 COMSPHERE 3550 Series Data Service Units 5-30 July 1999 3550-A2-GB20-40...

  • Page 99: Dsu Menu

    ........... . The following shows an example of the top-level menu for a standalone Model 3550 DSU that is configured as a control operating at 9.6 kbps, with an NMS message waiting.
  • Page 100 COMSPHERE 3550 Series Data Service Units July 1999 3550-A2-GB20-40...
  • Page 101 DSU Menu 3550-A2-GB20-40 July 1999...
  • Page 102 COMSPHERE 3550 Series Data Service Units Continued from Page Press a function key to select one of the following branches: Local branch Remote branch – Only available to a DSU configured as a control or a point-to-point tributary. Messages branch – Only appears when a message from the NMS is waiting.

  • Page 103: Configuration Worksheets

    (Full Mode: Enab or Disab), and make a copy. 2. Complete the information at the top of each worksheet first. If you have a Model 3550 (standalone) DSU, enter your site in the location field If you have a Model 3551 (carrier-mounted) DSU, enter the DSU’s carrier and slot location.
  • Page 104 Model 3550 or 3551 DSU Configuration Worksheet (1 of 2) Date:_______________________________________________ Device:_____________________________________________ Serial No:___________________________________________ Menu Value Full Mode Enab, Disab Value Rate(Kbps) 64L, 56, 38.4, 19.2, 9.6, 4.8, 2.4 PrtSp(Kbps) 64, 56, 48, 19.2, 9.6, 4.8, 2.4, 1.2, Disab TxClkSource...
  • Page 105 Model 3550 or 3551 DSU Configuration Worksheet (2 of 2) Backup Value Auto Bckup Enab, Disab Backup Dir (Chang) FacAlOnCMI Enab, Disab AutoRestor Enab, Disab (Chang) NtwkTimOut min and (1 to 30 min) RestorTimOu t (Chang) min and (1 to 60 min)
  • Page 106 Model 3550 or 3551 DSU Configuration Worksheet (1 of 2) Date:_______________________________________________ Device:_____________________________________________ Serial No:___________________________________________ Menu Value Full Mode Enab, Disab Value Rate(Kbps) 64L, 56, 38.4, 19.2, 9.6, 4.8, 2.4 PrtSp(Kbps) 64, 56, 48, 19.,2, 9.6, 4.8, 2.4, 1.2, Disab TxClkSource...
  • Page 107 Model 3550 or 3551 DSU Configuration Worksheet (2 of 2) MUX (Setup) Value MUX Funct Enab, Disab Share DevA Enab, Disab Port Cntrl Host, DSD Hardware Straps Value DDS Interface Permissive, Programmable Frame Ground/ Connected, Disconnected Signal Ground Test Mode indication...
  • Page 108 COMSPHERE 3550 Series Data Service Units July 1999 3550-A2-GB20-40...

  • Page 109: Status Indicators And Control Panel Messages

    Status indicators provide information on the current operating condition of the DSU. The status indicators of the Model 3550 DSU appear on the DCP’s faceplate. The status indicators for the carrier-mounted Model 3551 DSU are spread across the the faceplate of the DSU, the SDCP, and the faceplate of the shared diagnostic unit (SDU), if installed.

  • Page 110: C-1 Dsu Status Indicators

    COMSPHERE 3550 Series Data Service Units Label Color Green Alrm Test Yellow Dial Yellow TXD, RXD, RTS, Green CTS, DSR, DTR, Front Panel Yellow (Model 3551 only) The DSU or DBM is automatically put into Test mode when a remote DSU or DBM is performing a disruptive test (e.g., a Local Loopback (LL) at the control DSU.
  • Page 111 BERT Lamp init is one of the following initiators: Remt 3550-A2-GB20-40 Format The format of the control panel messages is shown below. Health and Status Messages There are three types of health and status messages.
  • Page 112 COMSPHERE 3550 Series Data Service Units Message Dial Tone:Fail Dial tone test was enabled and test failed. DDS F: alarm Digital facility alarm; alarm is one of the following network alarms: BiplrViol Fac Alarm OutofServc No Signal DSU:Device Fail Internal failure in the DSU is detected. (Go to the Test branch for Device Test.) DSU:Disable DSU transmitter is disabled.
  • Page 113 DSU initiates a DDS Facility Alarm and initiates dial backup. nn.n DDS Indicates the speed ( nn.n ) of the active core (DSU or DBM) when there are no alarms. 3550-A2-GB20-40 Table C-3 (3 of 3) Device Health and Status Messages Condition —...

  • Page 114: C-4 Expanded Health And Status Messages

    COMSPHERE 3550 Series Data Service Units Message Dial Attempt: nn The number ( nn ) of failures of dialing attempts since failure of private-line service. This message is cleared when the automatic backup process succeeds or the backup process is reset due to configuration option changes. When the maximum number of retries has been reached, Max appears.

  • Page 115: C-5 Subnetwork Health And Status Messages

    Multipoint tributary time-out. Multipoint tributary is not answering polls. Trunc Subtree truncation. More information is being received than can be returned in the poll. You must access each tributary for its messages. 3550-A2-GB20-40 Status Indicators and Control Panel Messages Table C-5 Condition...

  • Page 116: C-6 Command Progress Messages

    COMSPHERE 3550 Series Data Service Units Progress Messages Table C-6 describes the command progress messages, and Table C-7 describes the dial backup progress messages. Message Please wait . . . Command is taking more than 2 seconds to complete. Command Complete Command has been completed.

  • Page 117: C-8 Command Error Messages

    Inval Selection: Invalid menu selection based upon No Valid Choices previous selections that caused a menu to display with no selectable options. 3550-A2-GB20-40 Table C-8 Command Error Messages Condition 1. Check for a test in progress. 2. Either wait for the test to finish or abort the test.

  • Page 118: C-9 Dial Backup Error Messages

    COMSPHERE 3550 Series Data Service Units Message Notify NMS DBM: Busy DBM: Call Aborted DBM:Callbck Fail DBM: Conflict w/Envir DBM:Dir Empty DBM:DTR Discon DBM:Illegal Char DBM:No Answer DBM:NoDialTone DBM:No Ringing DBM: NotConnected DBM: RateMismatch DBM:SecurityFail If Yes, an error message is reported to the NMS if the NMS initiated the dial command.
  • Page 119 Inval lowest Prt DCE (the first port on TDM/Flex) was previously selected as the second port in a digital-sharing group. 3550-A2-GB20-40 Table C-10 (1 of 3) TDM/Flex Error Messages Condition You can correct the problem in one of two ways: 1.
  • Page 120 COMSPHERE 3550 Series Data Service Units Message Invalid timing A TDM/Flex port (Prt1 or Prt2) was previously selected as the source of external timing when the TDM/Flex was enabled. Now, the TDM/Flex is enabled. Ext was previously selected as the source...
  • Page 121 Too Many Ports The Lowest Port Number and Number of Ports in Group specifications for a digital-sharing group cannot be realized. 3550-A2-GB20-40 Table C-10 (3 of 3) TDM/Flex Error Messages Condition Allocate more capacity (bandwidth) to the port;...
  • Page 122 COMSPHERE 3550 Series Data Service Units C-14 July 1999 3550-A2-GB20-40...

  • Page 123: Pin Assignments

    ................Overview Pin assignments for the 3550 Series DSU connectors and interfaces are included here. Refer to them as needed.
  • Page 124 COMSPHERE 3550 Series Data Service Units Model 3550 – Digital (DDS) Network 8-Pin Cable Connector Pin Assignments Circuit Model 3550 – Dial (Analog) Network 6-Pin Cable Connector Pin Assignments Circuit Hubbing Device 8-Pin Modular Jacks Figure D-2. 3600 Hubbing Device (3600-F3-300)
  • Page 125 3600 Hubbing Device CC IN/DC OUT Jack Pin Assignments Signal Name Pin # –V Pass-Through DCOCTS/CCIRTS DCORTS/CCICTS DCOSD/CCIRD Signal Ground DCORD/CCISD +V Pass-Through 3550-A2-GB20-40 Table D-3 3600 Hubbing Device Pin Assignments Signal Name +5 Vdc DCOSD/CCIRD Signal Ground DCORD/CCISD Table D-4 In/Out —...

  • Page 126: Rear Connector Plate (3000-F1-021)

    COMSPHERE 3550 Series Data Service Units Figure D-3. Model 3551 DSU 25-Pin EIA-232/25-Pin V.35 Rear Connector Plate (3000-F1-021) July 1999 3550-A2-GB20-40...
  • Page 127 EIA-232 — — — — Data Signal Rate Selector function is not available at this time. These leads can be used for the External Lead functions. 3550-A2-GB20-40 Table D-5 ITU-T Transmit Data (TXD) Received Data (RXD) Request-to-Send (RTS) Clear-to-Send (CTS)

  • Page 128: D-6 V.35 Connector Pin Assignments

    COMSPHERE 3550 Series Data Service Units 25-Pin Connector 34-Pin Connector (Rear Connector (V.35 Adapter) Plate) Pin Number Pin Number 24, 11 23, 22 15, 2 16, 3 14, 1 99-16294 Figure D-4. V.35 Adapter Plug Table D-6 V.35 Connector Pin Assignments...
  • Page 129 Pin Assignments Figure D-5. EIA-232-D Crossover Cable (4951-035F) 3550-A2-GB20-40 July 1999...
  • Page 130 COMSPHERE 3550 Series Data Service Units TXD A TXD B RXD A RXD B TX CLK A TX CLK B RX CLK A RX CLK B EXT CLK A EXT CLK B FRM GND SIG GND Figure D-6. V.35 Crossover Cable (3211-178F) 15 FT.

  • Page 131: Application Configurations

    DSUs are equipped with DBMs. On the tributary side of the configurations a Model 3550 DSU is paired with a 3800 Series modem for backup. Other tributaries, each equipped with a DBM and TDM/Flex, are shown; one is paired with a carrier- mounted DSU, and the other is paired with another standalone DSU.
  • Page 132 COMSPHERE 3550 Series Data Service Units Figure E-1. Point-to-Point Application Configurations with Internal and External V.32 Backup July 1999 3550-A2-GB20-40...

  • Page 133: Multipoint Applications

    Multipoint Applications Model 3550 and Model 3551 DSUs also provide high-speed multipoint circuit support. The network can be controlled from the DSU’s control panel or a 6700 Series NMS. Figure E-2 shows sample multipoint configurations. Figure E-2. Multipoint Application Configurations...
  • Page 134 COMSPHERE 3550 Series Data Service Units July 1999 3550-A2-GB20-40...

  • Page 135: Equipment List

    Factory Installation For Model 3550 V.32 bis14.4 kbps DBM Rear Connector Plate – 25-Pin EIA-232/25-Pin V.35 V.35 Adapter Cable (Port 2 of Model 3550 2-port TDM/Flex) ACCULINK 3100 Series CSU Wall-Mount Adapter (for Model 3550) Model 3551 Digital (DDS) Network Cables 50-pin to eight 6-pin Multiple Network Interface Adapter (1.5i)
  • Page 136 Model 3550 Digital (DDS) Network Interface Cables – RJ48S Network Cable (14i cord included with Model 3550) 8-pin to 6-pin Modular (7i) Cable (Model 3550 in Canada) Model 3550 25-pin Plug to EIA-232 Plug Cable for extended circuits (select one) EIA-232 Crossover Cable Pin-to-Pin EIA-232 Cable (straight connection) V.35 Crossover Cable...
  • Page 137 DBM Core Line-Interface Rear Connector Plate – 25-Pin EIA-232/25-Pin V.35 V.35 Adapter Cable (For V.35 operation – Port 2 of Model 3550 2-port TDM/Flex) ACCULINKr 3100 Series CSU Wall-Mount Adapter (for Model 3550 DSU) Wall-Mount Bracket (1) 17I Velcror Brand Straps (2) RS-310-C L Bracket (1) #6 x 1.0I Screws (4)
  • Page 138 Model 3550 Dial (PSTN) Interface Cable Telephone Cord 6-pin Modular RJ11C/Permissive PSTN Plug – D4BU Telephone Cord 8-pin Modular RJ45S/Programmable PSTN Plug – D8W Model 3550 25-pin Plug to EIA-232 Plug Cable for extended circuits (select one) EIA-232 Crossover Cable Pin-to-Pin EIA-232 Cable (straight connection) V.35 Crossover Cable...
  • Page 139 3550-A2-GB20-40 Glossary The core that is transmitting data. For example, the DBM is the active core when the unit is in Backup mode. The network management protocol used by the COMSPHERE 6700 Series NMS. It provides diagnostic communication for the network.
  • Page 140 A function of the circuit card that provides data transmission capability. With Model 3550 or Model 3551 DSUs, there are two cores – one for the DSU and one for the DBM, and the data can be transmitted through either (also see active core).
  • Page 141 DSU models. See shared diagnostic control panel (SDCP) for the Model 3551. An external digital or analog device, attached to the Model 3550 or 3551 DSU, that is used for dial restoral (also see DBM).
  • Page 142 COMSPHERE 3550 Series Data Service Units errored second facility alarm fallback Front-End Processor (FEP) generator ITU-T LADS Lamp Test LATA link-level address Glossary-4 A performance measurement reported during Digital Test or Transmit Test Pattern that is defined as a second in which at least one error has been detected.
  • Page 143 PSTN rate adaption rear connector plate receiver 3550-A2-GB20-40 A test used to determine whether the DSU’s DTE connection and the DSU are operating properly. The DSU must be connected to the DTE for this loopback to be run. The state of the received Line Signal Detect lead, also known as carrier detect.
  • Page 144 The Model 3550 DSU which is designed for desktop operation. A standalone DSU can be configured as either a control or a tributary. A circuit card that supports time division multiplexing on two ports, and which can also increase digital-sharing capability.
  • Page 145 AsyncBit/Char, 5-20, 5-24 asynchronous, operation, 1-3 Auto Backup, 4-7 Auto Bckup, 5-21 AutoAnswer, 4-6, 5-13 automatic setup and restoration, 1-2 AutoRestor, 4-7, 5-21 AutoRetrain, 5-12 3550-A2-GB20-40 Index backup branch, 4-6 menu selections, 4-8 configuration options, 5-21 external dial, 1-2 manual, 4-8...
  • Page 146 COMSPHERE 3550 Series Data Service Units cable crossover EIA-232-D, figure, D-7 V.35, figure, D-8 EIA-232, connecting Port 2, 2-11 V.35 adapter, 3-7, D-6 connecting Port 2, 2-11 Call Aborted, DBM error message, C-10 Call Setup, 4-6, 5-14 Callback, 4-6 DBM message, C-8...
  • Page 147 DDS F: alarm message, C-4 DDS network connection, figure, 2-7 default setting, 5-5 descriptions, identity, 4-6 DBM test, C-3 DSU test, C-4 3550-A2-GB20-40 Devic, 4-4, 4-9 message, C-7 device 3600 hubbing, D-2 3600 Series hubbing, pin assignments, D-3 CC IN/DC OUT, D-3...
  • Page 148 COMSPHERE 3550 Series Data Service Units directory dial backup, 4-17 entry, and password characters, 4-18 Disab message, C-7 Disabled DBM message, C-8 Displ, 4-11, 4-19, 4-20 displaying external leads, 4-19 DL, 4-10 DBM test, C-3 DSU test, C-4 port test, C-5...
  • Page 149 Illegal Char, DBM error message, C-10 impedance, 1-7 inbound, 1-3 Incmpt Diag mode error message, C-11 indicators, status, C-1 install DSU, 2-4, 3-5 Model 3550, 2-1 interface DDS network, 1-6 diagnostic, 1-6 DTE, 1-4 receive, VF, 1-7 switched network, 1-7 transmit VF, 1-7 V.35 DTE, 1-4...
  • Page 150 COMSPHERE 3550 Series Data Service Units leads external, 4-19 changing, 4-19 displaying, 4-19 reporting external changes to NMS, 4-20 states, 4-20 LED, light-emitting diode, 1-2 LEDs, 4-19 line communication DSU, 1-6 V.32 DBM, 1-7 speeds, 1-3 Link Delay, 5-11 link-level network addressing, 3-10...
  • Page 151 Orig, 4-7 outbound, 1-3 Out-of-Frame Threshold alarm, C-2 OutofFrameThresh message, C-5 OutofServc alarm, C-4 Out-of-Service alarm, C-2 Overspeed, 5-20, 5-24 3550-A2-GB20-40 P Tst message, C-5 Packet Delay, 5-11 packets, 4-11 part number, F-1, F-3 Password, 4-6 password characters, 4-18 PCC Buffer, 5-25...
  • Page 152 COMSPHERE 3550 Series Data Service Units rate adaption, 1-1 data DSU, 1-6 V.32 DBM, 1-7 port, 1-5 Rate(Kbps), 5-6, 5-12, 5-16 RateMismatch, DBM error message, C-10 rear connector plate, 1-4 Model 3551, D-4 receive VF interface, 1-7 reconfiguring DSU port, 4-14...
  • Page 153 Model 3551, 3-3 location, figure, 2-3 settings, Model 3550, 2-3, 3-3 switched carrier emulation, 1-3 network interface, 1-7 Sync >Async Req error message, C-13 Sync Port Requir error message, C-13 SystemStat, 5-18 TDM/Flex, 1-2, 1-3 technical specifications, 1-8...

This manual is also suitable for:

3551Comsphere 3550Comsphere 3551

Table of Contents