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Paradyne Comsphere 3830 User Manual

Comsphere 3800 series
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COMSPHERE
3800 SERIES MODEMS
MODEL 3830
USER'S GUIDE
Document No. 3830-A2-GB91-20

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Summary of Contents for Paradyne Comsphere 3830

  • Page 1 COMSPHERE 3800 SERIES MODEMS MODEL 3830 USER’S GUIDE Document No. 3830-A2-GB91-20...

  • Page 2: Comsphere 3800 Series Modems – Model

    For the Model 3830 standalone modem, the Universal Service Order Code (USOC) for Permissive mode is RJ11C and for Programmable mode is RJ41S or RJ45S. The Canadian equivalent to the USOC is CA11 for RJ11C, and CA41A and CA45A for RJ41S and RJ45S, respectively.
  • Page 3 – Within the U.S.A., call 1-800-870-2221 – International, call 727-530-2340 Trademarks All products and services mentioned herein are the trademarks, service marks, registered trademarks or registered service marks of their respective owners. 3830-A2-GB91-20 November 1996 Trademarks...
  • Page 4 COMSPHERE 3800 Series Modems – Model 3830 Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. This product is intended to be used with a three-wire grounding type plug – a plug which has a grounding pin.
  • Page 5 – 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. 3830-A2-GB91-20 November 1996 Safety Instructions...
  • Page 6 COMSPHERE 3800 Series Modems – Model 3830 Notices November 1996 3830-A2-GB91-20...

  • Page 7: Government Requirements And Equipment Return

    RENs, contact the telephone company to determine the maximum RENs for the calling area. 4. If the Model 3830 modem causes harm to the telephone network, the telephone company will notify you in advance that temporary discontinuance of service may be required.
  • Page 8 COMSPHERE 3800 Series Modems – Model 3830 6. If you experience trouble with this equipment, please contact your sales or service representative (as appropriate) for repair or warranty information. If the product needs to be returned to the company service center for repair, contact them directly for return...
  • Page 9 The Load Number (LN) assigned to each terminal device denotes the percentage of the total load to be connected to a telephone loop which is used by the device to prevent overloading. The 3830-A2-GB91-20 CAUTION November 1996 Safety Instructions...
  • Page 10 COMSPHERE 3800 Series Modems – Model 3830 termination on a loop may consist of any combination of devices subject only to the requirement that the total of the Load Numbers of all devices does not exceed 100. If your equipment is in need of repair, refer to the procedure in the Government Requirements and Equipment Return section.

  • Page 11: How To Use This Manual

    Objectives and Reader Assumptions This manual describes how to install and operate the Model 3830 standalone modem. This manual assumes that you have a basic understanding of dial modems and their operation. How to Use this Manual Chapter 1 provides information about the 3830 modem’s hardware and software features, including the front panel and status indicators.

  • Page 12: Related Documents

    COMSPHERE 3800 Series Modems – Model 3830 Related Documents Call your sales representative to order additional product documentation. 3810-A2-GB91 COMSPHERE 3800 Series Modems, Models 3810, 6700-A2-GY31 COMSPHERE 6700 Series Network Management 3811, and 3820, User’s Guide System User’s Guide November 1996...

  • Page 13: Table Of Contents

    Table of Contents Introduction Overview Features COMSPHERE Model 3830 Modem Front Panel and Status Indicators Model 3830 Modem Installation Overview Model 3830 Modem Package Model 3830 Installation DTE Connection Dial-Line Connection 2-Wire Leased-Line Connection Telephone Connection AC Power Transformer Connection...
  • Page 14 COMSPHERE 3800 Series Modems – Model 3830 AT Command Set and S-Registers Overview Operating Modes Command Guidelines AT Command List S-Register List Appendices Troubleshooting Technical Specifications Pin Assignments CCITT V.25 bis Dialing Commands and Response Glossary Index ........
  • Page 15 List of Figures Figures Model 3830 Front Panel Model 3830 Rear Panel Wiring Diagram – 8-Position to 6-Position Conversion Cable 3830-A2-GB91-20 .......
  • Page 16 COMSPHERE 3800 Series Modems – Model 3830 Tables Model 3830 LEDs Result Codes ........
  • Page 17 The modem’s compatibility with a number of dialing methods and protocols, such as asynchronous AT dialing, permits the Model 3830 to be used in a variety of applications and environments while also allowing control over modem configuration, dialing, and diagnostics. The modem offers two preset factory configurations containing the most often used modem settings.
  • Page 18 COMSPHERE 3800 Series Modems – Model 3830 Features The 3830 modem has a wide variety of features, including: Dial-Line Modulations: V.32terbo (19,200 and 16,800 bps), CCITT V.32 bis (14,400, 12,000, 9600, 7200, and 4800 bps), V.32 (9600 and 4800 bps), V.22 bis (2400 bps), V.22 (1200 bps), V.21 (300 bps), Bell 212A (1200 bps), and...

  • Page 19: Comsphere Model 3830 Modem Front Panel And Status Indicators

    Two factory-defined configurations and two user-defined configuration areas. COMSPHERE Model 3830 Modem Front Panel and Status Indicators The front panel of the Model 3830 modem is equipped with a speaker and 13 LEDs (status indicators) that monitor modem activity (Figure 1-1). COMSPHERE 3830 Figure 1-1.

  • Page 20: Model 3830 Leds

    COMSPHERE 3800 Series Modems – Model 3830 Label Color green ALRM green DTR/108 green RTS/105 green CTS/106 green TXD/103 green LSD/109 green RXD/104 green yellow green Table 1-1 (1 of 2) Model 3830 LEDs Indicates Power ON. Power is on and the modem is capable of operating.
  • Page 21 RATE yellow yellow 3830-A2-GB91-20 Table 1-1 (2 of 2) Model 3830 LEDs Indicates Rate ON. The modem is connected at a data rate lower than the data rate it is configured for. OFF. The modem is connected at its configured data rate.

  • Page 22: Model 3830 Modem Installation

    ........... . Model 3830 Modem Package...

  • Page 23: Model 3830 Installation

    19,200 bps. Also, low capacitance cables may be necessary for speeds greater than 19,200 bps or distances greater than 50 feet. The rear panel of the Model 3830 (Figure 2-1) modem has the following switches and connectors: An ON/Off power switch.
  • Page 24 An 8-pin modular keyed jack for external telephone set use only. An 8-pin modular keyed jack for dial (PSTN) lines or 2-wire leased lines. A 25-pin DB-25-S receptacle for DTE interface. Figure 2-1. Model 3830 Rear Panel 3830-A2-GB91-20 November 1996...

  • Page 25: Dte Connection

    2. Install a cable tie behind the ferrite choke to prevent it from sliding along the cable. Dial-Line Connection Use the following procedures to connect a Model 3830 to the dial network interface. The feature/part number for a 7-foot, 6-position, 4-wire modular cord is 125-0067-0031: 1.

  • Page 26: 2-Wire Leased-Line Connection

    2-Wire Leased-Line Connection Use the following procedures to connect a Model 3830 modem to the 6-pin, center pair, leased-line network interface. (For 2-wire leased line connection to a JM8 network interface, refer to Appendix C.) 1. Insert the 6-position, 4-conductor modular plug into the jack labeled LINE, Figure 2-1.

  • Page 27: Communications Software Installation

    Refer to your software’s user’s guide for installation procedures. For an overview of how to use AT commands and a list of AT commands supported by the Model 3830, refer to Chapter 4, AT Command Set and S-Registers. Modem Power-Up Once your modem is properly connected to the DTE, dial or leased lines, and ac outlet, press the modem’s rear panel power switch to the...

  • Page 28: Selecting Factory Configuration Options

    Recovering AT Commands section for these procedures. To change a factory template, perform the following steps (for more information on changing factory templates using AT commands, refer to Chapter 4, AT Command Set and S-Registers). 3830-A2-GB91-20 2. Model 3830 Modem Installation NOTE November 1996...
  • Page 29 COMSPHERE 3800 Series Modems – Model 3830 1. Use the AT&F&W command to load the appropriate factory configuration to the appropriate storage area. Enter the following: TYPE: Where: y is one of the following Factory configurations: Where: n is one of the following storage areas: These three configuration areas are nonvolatile memory locations.

  • Page 30: Recovering At Commands

    Certain dialing methods, such as V.25 bis and synchronous operation, disable the use of AT commands and place the modem into a state known as Dumb mode. The Model 3830 is capable of normal operation when in Dumb mode. However, if the setting of a configuration option must be changed, it can only be accomplished using an AT command.
  • Page 31 COMSPHERE 3800 Series Modems – Model 3830 If these characters are not echoed back to the DTE screen after the power-up self-test is complete, then the modem is still in Dumb mode and maintains its current configuration. Turn the modem Off and then ON again, and repeat Step 1.

  • Page 32: Initialization Strings

    Note that the character format must be 7 data bits, odd parity, and 1 stop bit: TYPE: PRESS: 3830-A2-GB91-20 AT&F &D1 &S1 &M234 &W Enter AT&F &D1 &S1 &M233 &W Enter November 1996 2. Model 3830 Modem Installation 2-11...

  • Page 33: Synchronous Leased-Line Applications

    COMSPHERE 3800 Series Modems – Model 3830 Synchronous Leased-Line Applications For synchronous leased-line operation, create the following initialization string with the following commands: TYPE: Where: PRESS: AT&T Exclusive Dialing for DATAKIT Applications For AT&T exclusive dialing for DATAKIT initialization string with the following commands:...

  • Page 34: Fax Operation

    The device you intend to communicate with must be compatible with your modem, which means that it must be capable of using the same protocol. Your 3830 modem supports the EIA/TIA-592 standard for Class 2 fax modems.
  • Page 35 COMSPHERE 3800 Series Modems – Model 3830 You must have configured your modem according to the specifications of your fax software manual. For example: – Some fax software requires that the modem have Auto-Answer disabled. You can set this with the ATS0=0 command.

  • Page 36: Result Codes

    ..........Overview This chapter discusses guidelines necessary to operate AT commands as well as listing all AT commands supported by the Model 3830 modems. AT commands are issued from asynchronous DTEs. Operating Modes The Model 3830 modem has two operating modes: Command mode and Data mode.

  • Page 37: Escape Sequence And Escape Guard Time

    Escape Guard Time value determines the idle time required before and after the escape sequence is issued. The Model 3830 uses a 1-second pause as the Escape Guard Time. (To change this value, refer to S-Register S12 discussed later in Table 4-3 in the S-Register List section.)

  • Page 38: Command Guidelines

    Valid commands are acknowledged with numeric or word result codes (unless the result codes have been disabled using the Q1 command). Table 4-1 lists all available result codes with numeric and word equivalents. 3830-A2-GB91-20 4. AT Command Set and S-Registers November 1996...

  • Page 39: Result Codes

    COMSPHERE 3800 Series Modems – Model 3830 Result Codes Table 4-1 lists all valid result codes for the Model 3830 modem. Refer to the Vn and Xn commands for more on result codes. Numbers Numbers * Appears when the Extended Result Codes configuration option is enabled.
  • Page 40 *** Appears when the Extended Result Codes configuration option is set for Add/ EC. If this configuration option is set for Add/V42, MNP, then either V42b, V42, MNP5, MNP4, MNP3, MNP2, or NoEC appears. 3830-A2-GB91-20 4. AT Command Set and S-Registers Table 4-1...

  • Page 41: At Command List

    AT commands are entered while the modem is in Command mode and use the following format: TYPE: Where: PRESS: Table 4-2 lists all AT commands supported by the Model 3830 modem. The Async Dial factory default is listed in bold. Table 4-1 (3 of 3) Result Codes...

  • Page 42: Model 3830 At Commands

    4. AT Command Set and S-Registers Table 4-2 (1 of 22) Model 3830 AT Commands AT Command Recovery Mode Allows the modem to remain in Asynchronous data mode so that AT commands can be used to change the modem’s current configuration.
  • Page 43 COMSPHERE 3800 Series Modems – Model 3830 Dial Begins the dialing sequence. The dial string n (modifiers and telephone number) is entered after the D command. Any digit 0–9, * , # , A, B, C, D, may be dialed as a DTMF tone. Only the digits 0–9 can be dialed in Pulse Dial mode.
  • Page 44 4. AT Command Set and S-Registers Table 4-2 (3 of 22) Model 3830 AT Commands D n , continued R – Reverse Dial mode. Causes the originating modem to send out an answertone once it no longer detects ringback. (Ringback is the ring you hear at the originating site when making a call.) The R parameter must be...
  • Page 45 COMSPHERE 3800 Series Modems – Model 3830 Identification Provides useful information when upgrading or servicing the product. I0 Displays product code (default is 144). I1 Displays 3-digit firmware revision number. I2 Performs an EPROM check. I3 Displays serial number. I4 Displays model number.
  • Page 46 4. AT Command Set and S-Registers Table 4-2 (5 of 22) Model 3830 AT Commands Result Codes Result codes are informational messages (such as Connect and Ring) sent from the modem and displayed on the asynchronous DTE terminal. Refer to Table 4-1 for a list of result codes.
  • Page 47 COMSPHERE 3800 Series Modems – Model 3830 Extended Result Code, Dial Tone Detect, and Busy Tone Detect The X n command sets three configuration options simultaneously: X0 Disable X1 Enable X2 Enable X3 Enable X4 Enable X5 Add/EC X6 Add/V42,MNP...
  • Page 48 4. AT Command Set and S-Registers Table 4-2 (7 of 22) Model 3830 AT Commands X n , continued BUSY TONE DETECT Sets the modem to monitor for Busy Tone (Enable) or ignore Busy Tone (Disable). Disable. Modem ignores busy tone.
  • Page 49 COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (8 of 22) Model 3830 AT Commands &C n LSD Control Line Signal Detect (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 50 &F5 and &F6 options invoke the Enhanced Throughput Cellular (ETC ) feature. &F0 Async Dial &F3 UNIX Dial &F5 Cellular (Mobile) &F6 Cellular (PSTN) 3830-A2-GB91-20 Table 4-2 (9 of 22) Model 3830 AT Commands November 1996 4. AT Command Set and S-Registers 4-15...
  • Page 51 COMSPHERE 3800 Series Modems – Model 3830 &F n Select Factory Default Configuration Options (cont’d) If your modem is attached to a cellular telephone, use the &F5 command to configure the modem for cellular communications. &F5 sets the following configuration options:...
  • Page 52 4. AT Command Set and S-Registers Table 4-2 (11 of 22) Model 3830 AT Commands &I n Dial Transmit Level for Cellular Auto When Dial Transmit Level Type is set to Permissive, &In sets Dial Transmit Level to a value between –10 and –32 dBm. &I99 and &I100 causes the level to be varied automatically according to conditions for Enhanced Throughput Cellular (ETC) operation.
  • Page 53 COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (12 of 22) Model 3830 AT Commands &Mn or &Qn Async/Sync Mode and DTE Dialer Type Sets the modem for either asynchronous or synchronous operation and selects the type of dialing method the modem uses.
  • Page 54 &R2 Simulated Control Carrier. RTS input controls the remote modem’s LSD signal. This is used for DTEs that require Line Signal Detect (LSD) to toggle ON and Off to simulate half-duplex operation. &R3 Control Carrier. Not valid for Model 3830 operation. 3830-A2-GB91-20 November 1996...
  • Page 55 COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (14 of 22) Model 3830 AT Commands &S n DSR Control Data Set Ready (DSR) is a signal from the modem to the DTE indicating the modem is connected and ready for operation.
  • Page 56 4. AT Command Set and S-Registers Table 4-2 (15 of 22) Model 3830 AT Commands &T n Tests &T0 Abort. Stops any test in progress. &T1 Local Analog Loop. &T2 Pattern. Transmits and receives a 511 Bit Error Rate Test (BERT).
  • Page 57 COMSPHERE 3800 Series Modems – Model 3830 &V n View Configuration Options Displays each configuration group within the Active (Operating), Active (Saved), Customer 1, and Customer 2 configuration areas as well as the telephone numbers stores in directory locations 1–10.
  • Page 58 MNP, the minimum value is 64; if a smaller value is specified, it will default to 64. &F5 sets this to \A4. 3830-A2-GB91-20 Table 4-2 (17 of 22) Model 3830 AT Commands November 1996 4. AT Command Set and S-Registers 4-23...
  • Page 59 COMSPHERE 3800 Series Modems – Model 3830 \C n Error Control Negotiate Buffer Determines if the answering modem buffers the data that it received from the remote modem during an interval in which the modem attempts to establish a connection using error control. Online changes to this configuration option do not take effect until a disconnect occurs.
  • Page 60 DTE. BREAK FORCES ESCAPE Determines whether or not the modem should enter Command mode when it receives a break character from the DTE. 3830-A2-GB91-20 Table 4-2 (19 of 22) Model 3830 AT Commands Break Send Buffer Break Control Control...
  • Page 61 COMSPHERE 3800 Series Modems – Model 3830 Error Control Mode Determines the type of error control used by the modem. In most cases, V42/MNPorBfr is the best choice. If V.42 bis and MNP are enabled, then the modem uses the following priority for error control negotiation: V.42 bis, V.42, MNP 5 and below.
  • Page 62 4. AT Command Set and S-Registers Table 4-2 (21 of 22) Model 3830 AT Commands No Data Disconnect Timer Forces the modem to disconnect if no data is transmitted or received within a specified amount of time. \T0 Disable. \Tn Where n is a value from 1 to 255 in 1-minute increments.

  • Page 63: S-Register List

    “H2 Receive only. ‘‘H3 Enable. S-Register List S-Registers affect the operating parameters of the Model 3830 modem. These registers are applicable only when the DTE Dialer Type configuration option is set for AT. (See &Mn and &Qn commands.) S-Registers can be displayed and/or modified when the modem is in Command mode.

  • Page 64: Model 3830 S-Registers

    Determines ASCII value used as the line feed character. Enter a value from 0–127 for the line feed character. Factory setting is 10 (ASCII line feed). 3830-A2-GB91-20 Table 4-3 (1 of 15) Model 3830 S-Registers November 1996 4. AT Command Set and S-Registers 4-29...
  • Page 65 COMSPHERE 3800 Series Modems – Model 3830 Backspace Character Determines ASCII value used as the backspace (Backspace key). This character moves the cursor to the left and erases the previous character. Enter a value from 0–127. Factory setting is 08 (ASCII backspace).
  • Page 66 Sets the length of time (in 10-millisecond increments) the modem waits after receiving RTS before issuing CTS to the DTE. Enter a value from 0–255. Factory setting is 0 milliseconds. 3830-A2-GB91-20 Table 4-3 (3 of 15) Model 3830 S-Registers November 1996 4. AT Command Set and S-Registers 4-31...
  • Page 67 COMSPHERE 3800 Series Modems – Model 3830 Rate Auto Originate Initiates a dial backup call, using the phone number in directory location 1, when the leased-line rate of the modem falls back to or below a certain speed. Register has the following values:...
  • Page 68 13 = 75/1200 (V.23) 20 = 19,200 (V.32 terbo ) 21 = 16,800 (V.32 terbo ) Factory setting is 19,200 (V.32 terbo ). 3830-A2-GB91-20 Table 4-3 (5 of 15) Model 3830 S-Registers November 1996 4. AT Command Set and S-Registers 4-33...
  • Page 69 COMSPHERE 3800 Series Modems – Model 3830 V.32 bis Train Register controls the modem’s train time for V.32 bis/V.32 mode. Register has the following values: 0 = Long (A long train is required for satellite links which have long roundtrip delays.) 1 = Short Factory setting is Long.
  • Page 70 Determines if the modem performs a remote digital loopback if it receives a CT140 signal from the DTE. Register has the following values: 0 = Disable 1 = Enable Factory setting is Disable. 3830-A2-GB91-20 Table 4-3 (7 of 15) Model 3830 S-Registers November 1996 4. AT Command Set and S-Registers 4-35...
  • Page 71 0 = Disable 1 = Enable Factory setting is Disable. Access from Remote Determines whether the 3830 modem’s configuration options can be accessed by a remote 3800 Series modem via a dial-line or leased-line connection. 0 = Enable 1 = Disable Factory default is Enable.
  • Page 72 0 = Carriage Return and Line Feed 1 = Carriage Return 2 = Line Feed Factory setting is carriage return and line feed (CR + LF). 3830-A2-GB91-20 Table 4-3 (9 of 15) Model 3830 S-Registers November 1996 4. AT Command Set and S-Registers 4-37...
  • Page 73 COMSPHERE 3800 Series Modems – Model 3830 Line Current Disconnect Determines if the modem disconnects if an interruption in loop current greater than 8 milliseconds or 90 milliseconds occurs. Register has the following values: 0 = Enable (8 msec) 1 = Enable (90 msec) 2 = Disable Factory setting is Enable (8msec).
  • Page 74 Management System controller when the DTR signal has been Off for more than 10 seconds. Register has the following values: 0 = Disable 1 = Enable 3830-A2-GB91-20 Table 4-3 (11 of 15) Model 3830 S-Registers November 1996 4. AT Command Set and S-Registers 4-39...
  • Page 75 COMSPHERE 3800 Series Modems – Model 3830 V.32 bis Automode (Dial Line) If enabled, automode permits the modem to automatically connect to a remote modem using any supported modulation scheme. If disabled, the modem only supports the modulation scheme selected by the S41 register (Dial-Line Rate).
  • Page 76 2 =No Strap or ERROR. The modem ignores all configuration commands, but always issues an OK response message. Factory setting is Normal. 3830-A2-GB91-20 Table 4-3 (13 of 15) Model 3830 S-Registers November 1996 4. AT Command Set and S-Registers 4-41...
  • Page 77 COMSPHERE 3800 Series Modems – Model 3830 Fast Disconnect Allows the modem to disconnect immediately after receiving a disconnect command from a local DTE or its own diagnostic control panel. Register has the following values: 0 = Disable 1 = Enable Factory setting is Disable.
  • Page 78 Register controls support for an RJ11 connection, including generation of the ETC 1.1 Calling Tone during call origination. 0 = Disable 1 = Enable Factory setting is Disable. 3830-A2-GB91-20 Table 4-3 (15 of 15) Model 3830 S-Registers November 1996 4. AT Command Set and S-Registers 4-43...
  • Page 79 Overview This appendix points out basic problems that can occur when operating a 3830 modem. Use Tables A-1 through A-5 to check out these problems. If you are having data communication difficulties, such as periodic character loss, random errors, or constant format errors, use the loopback tests associated with the &T command.

  • Page 80: Modem Health

    COMSPHERE 3800 Series Modems – Model 3830 Symptom Modem did not pass power-up self-test Power LED does not light A problem is suspected after the power-up self-test Table A-1 Modem Health Action Contact your customer service representative. Make sure the modem’s ON/Off switch is in the ON position.

  • Page 81: Modem - Dte Connection

    Symptom Modem does not accept or echo back AT commands 3830-A2-GB91-20 Table A-2 Modem – DTE Connection Verify that the cable between the Async port of the DTE and the modem is a standard RS-232 cable. If the cable is bad, replace it. (Null modem cables, also known as crossover cables, do not work in this application.)

  • Page 82: Modem - Vf Connection

    COMSPHERE 3800 Series Modems – Model 3830 Symptom Modem does not receive a dial tone Modem does not go off-hook and answer an incoming call Modem goes off-hook, answers, but does not connect Table A-3 (1 of 4) Modem – VF Connection Attach the telephone directly to the wall outlet to verify that a dial tone exists.
  • Page 83 (2 of 4) Modem – VF Connection Verify that originating modem supports your modem’s modulation schemes. The 3830 modem recognizes V.32 terbo, CCITT V.32 bis, V.32, V.22 bis, V.22, V.21, Bell 212A, and Bell 103J. The 3800 Series modem does not support other vendors’...
  • Page 84 COMSPHERE 3800 Series Modems – Model 3830 Symptom Modem does not go off-hook and begin dialing (continued) Modem dials but does not connect Intermittent disconnects, high error rates, or excessive retransmissions Modem establishes and disconnects a call Table A-3 (3 of 4) Modem –...

  • Page 85: Online Operation

    Symptom Data scrambled or unreadable Missing data during a transfer 3830-A2-GB91-20 Table A-3 (4 of 4) Modem – VF Connection The remote modem may be in a forced Error Control mode (disconnect if there is no error control).

  • Page 86: Leased-Line Operation

    COMSPHERE 3800 Series Modems – Model 3830 Symptom Modems do not train-up on leased lines Table A-5 Leased-Line Operation Verify that the correct cabling is used for your application. Refer to Chapter 2 for modem installation instructions. Verify that one modem is configured for Answer mode and the other is configured for Originate mode.

  • Page 87: Technical Specifications

    Technical Specifications Technical Specifications Table B-1 shows the technical specifications for the Model 3830 modem. Model 3830 Technical Specifications Specifications APPROVALS (115 Vac, 60 Hz only) FCC Part 15 FCC Part 68 DOC CS-02 and CS-03 3830-A2-GB91-20 Technical Specifications .........
  • Page 88 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 Technical Specifications Specifications COMPATIBILITY ENVIRONMENT Operating Temperature Relative Humidity Shock and Vibration Storage Temperature DTE INTERFACE 25-pin D-subminiature connector AC POWER REQUIREMENTS Table B-1 (2 of 4) Description DIAL-LINE MODULATIONS V.32 terbo (19,200, 16,800 bps) CCITT V.32 bis (14,400, 12,000, 9600, 7200,...
  • Page 89 Model 3830 Technical Specifications Specifications POWER CONSUMPTION DIMENSIONS Weight Height Width Depth TRANSMIT LEVEL Dial Line Leased Line TELEPHONE INTERFACE Dial-Line Connectivity Leased-Line Connectivity VOICE FREQUENCY LINE REQUIREMENTS 3830-A2-GB91-20 Table B-1 (3 of 4) Description 5.25 watts (typical, including power transformer, speaker off) 2.5 pounds (1.14 kg) (not including power...
  • Page 90 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 Technical Specifications Specifications DATA RATES Dial Line Leased Line ERROR CONTROL DATA COMPRESSION Table B-1 (4 of 4) Description 19,200, 16,800, 14,400, 12,000, 9600, 7200, 4800, 2400, 1200, or 300–0 bps.

  • Page 91: Eia-232-D Pin Assignments

    Name – 3830-A2-GB91-20 Pin Assignments ........
  • Page 92 COMSPHERE 3800 Series Modems – Model 3830 RS-232 Name +10V –10V – CT112 – – – CT141 CT140 Table C-1 (2 of 3) EIA-232-D Pin Assignments CCITT Circuit – – – – – – – – – – – –...
  • Page 93 (1) 2-wire operations (2) 4-wire operations w/o TEK leads (3) 4-wire operations with TEK leads TEK leads are for loopback purposes. A 50-pin version is being considered for multiple line connections.” 3830-A2-GB91-20 Table C-1 (3 of 3) EIA-232-D Pin Assignments CCITT...
  • Page 94 COMSPHERE 3800 Series Modems – Model 3830 The Model 3830 provides the 2-wire leased-line signals on the same leads used for Tip and Ring when in Dial mode. To connect the modem to a standard JM8 leased-line jack, a conversion cable (125-0054-1531) must be used.

  • Page 95: Vf Connector Pin Assignments For Leased Lines

    Table C-2 illustrates the connector pin assignments for Model 3830 modular jacks as well as the pin assignments for the leased-line jacks. VF Connector Pin Assignments for Leased Lines Model 3830 Model 3830 Connector Connector Pin No. Connector 6-pin/8-pin Phone-Ring...
  • Page 96 CCITT V.25 bis is an international dialing protocol that permits direct and stored number dialing using DTEs in either Asynchronous, Bisynchronous, or HDLC operating mode. The Model 3830 modem supports V.25 bis request and answer commands that initiate and cancel...

  • Page 97: Call Request Commands

    COMSPHERE 3800 Series Modems – Model 3830 The following section discusses those V.25 bis commands supported by the Model 3830 modem and the responses to those commands. Tables D-1 and D-2 in the Command Response section list the V.25 bis command and response and the analogous AT command.

  • Page 98: Call Request With Number Provided (Crn

    A Call Response indicates if the command was accepted by the modem. Call Response includes Call Failure Indication (CFI) and Call Connecting (CNX). 3830-A2-GB91-20 D. CCITT V.25 bis Dialing Commands and Response CRNn n is the dial string. The following characters are...

  • Page 99: Call Failure Indication (Cfi

    COMSPHERE 3800 Series Modems – Model 3830 Call Failure Indication (CFI) The CFI response is issued to the DTE if the modem fails a CRN or CRS command. CFI is similar to the AT result codes BUSY, NO ANSWER, NO CARRIER, NO DIALTONE, and ERROR.

  • Page 100: Call Answer Commands

    The CIC command format is CIC. If CIC is issued within 10 seconds, the modem sends the VAL response to the DTE. If CIC is issued after 10 seconds, INV is returned. 3830-A2-GB91-20 D. CCITT V.25 bis Dialing Commands and Response November 1996...

  • Page 101: Program Normal (Prn

    COMSPHERE 3800 Series Modems – Model 3830 Program Normal (PRN) The Program Normal (PRN) command allows the DTE to enter and store a telephone number to a specific directory location. PRN is similar to the AT&Z command. The PRN command format is:...

  • Page 102: Command Response

    V.25 bis command from the DTE. INV is similar to the AT result code ERROR. The INV response format is: Where: Table D-1 lists V.25 bis commands supported by the Model 3830 modem. 3830-A2-GB91-20 D. CCITT V.25 bis Dialing Commands and Response...

  • Page 103: V.25 Bis Commands

    COMSPHERE 3800 Series Modems – Model 3830 V.25 bis Command CALL REQUEST COMMANDS Call Request with Number Provided Call Request with Memory Address Incoming Call Indication Disregard Incoming Call Connect Incoming Call Program Normal Request to List Stored Number Table D-1 V.25 bis Commands...

  • Page 104: V.25 Bis Response Messages

    Table D-2 lists V.25 bis response messages supported by the Model 3830 modem. V.25 bis Command 3830-A2-GB91-20 D. CCITT V.25 bis Dialing Commands and Response Table D-2 V.25 bis Response Messages Description CALL RESPONSE Call Failure Indication Call Connecting Indication...
  • Page 105 Answer mode ASCII Async Dial 3830-A2-GB91-20 Glossary A configuration area containing configuration options currently in use by the modem. When a power cycle occurs, a reset is performed, or a save is issued, this area is updated with the contents of Active (Saved).

  • Page 106: Comsphere 3800 Series Modems – Model

    COMSPHERE 3800 Series Modems – Model 3830 asynchronous transmission AT command set AT prefix autobaud automatic answer baud Bisync Glossary-2 A data transmission that is synchronized by a transmission start bit at the beginning of a character (five to eight bits) and one or more stop bits at the end.
  • Page 107 CCITT V.22 bis CCITT V.25 bis CCITT V.27 ter CCITT V.29 CCITT V.32 3830-A2-GB91-20 A storage device used to compensate for differences in the data flow rate when transmitting data from one device to another. A sequence of successive bits (usually eight) handled as a unit in data transmission.
  • Page 108 COMSPHERE 3800 Series Modems – Model 3830 CCITT V.32 bis CCITT V.42 CCITT V.42 bis CCITT V.54 character character echo Class 1 fax Class 2 fax command line Command mode configuration option connector Glossary-4 A standard for modems operating full-duplex with...
  • Page 109 Customer 2 data carrier data compression Data mode DB-25 connector demodulation 3830-A2-GB91-20 Canadian Standards Association. Clear-to-Send. A signal indicating that the modem is ready for the DTE to transmit data. A user-defined configuration area containing customized configuration options for a specific application.
  • Page 110 COMSPHERE 3800 Series Modems – Model 3830 dial command modifiers dial line dial network dial string digital signal directory location download EIA-232-D EIA RS-366-A Glossary-6 A modifier used in the dial string that instructs the modem how to process a dialed telephone number.
  • Page 111 Group III half-duplex handshaking host 3830-A2-GB91-20 Erasable programmable read-only memory. An algorithm used to correct data transmission errors. Default setting is +++. This sequence lets you switch your modem from Data mode to Command mode.
  • Page 112 COMSPHERE 3800 Series Modems – Model 3830 HDLC leased line local analog loopback long space disconnect loopback test modem Glossary-8 High-Level Data Link Control. A communications protocol defined by ISO. A unit of frequency (hertz) that equals one cycle per second.
  • Page 113 3830-A2-GB91-20 The process of varying some characteristics (usually amplitude, frequency, and/or phase) of a carrier wave to form data transmissions. A telephone or modem is being used. A telephone or modem is not being used.
  • Page 114 COMSPHERE 3800 Series Modems – Model 3830 PSTN pulse dialing register remote loopback result code RJ11 rotary S-Registers serial transmission Sync Dial synchronous transmission Glossary-10 Public Switched Telephone Network. A network shared among many users who can use telephones to establish connections between two points. Also known as dial network.
  • Page 115 UNIX Dial USOC XOFF 3830-A2-GB91-20 One of two dialing methods, in which telephone numbers are sent as tones across the telephone lines. A process where two modems try to establish a connection over the VF line. Underwriter’s Laboratories, Inc.
  • Page 116 3830-A2-GB91-20 Index A/ (Repeat Last Command), 4-7 ac power, 2-5 Answer mode (ATA), 4-7 Async/Sync Mode (AT&M), 4-18 AT Commands “H (V.42 bis Compression), 4-28 &C (LSD Control), 4-14 &D (DTR Action), 4-15 &F (Factory Defaults), 4-15 &G (V.22 bis Guard Tone), 4-16 &I (Dial Transmit Level), 4-17...
  • Page 117 COMSPHERE 3800 Series Modems – Model 3830 Index-2 \N (Error Control Mode), 4-26 \Q (Flow Control of DTE and Modem), 4-26 \T (No Data Disconnect Timer), 4-27 \X (XON/XOFF Passthrough Flow Control), 4-27 A (Answer Mode), 4-7 D (Dial), 4-8...
  • Page 118 3830-A2-GB91-20 Call Answer commands (V.25 bis), D-5 Call Request commands (V.25 bis), D-2 Call Response (V.25 bis), D-3 Call Waiting, 4-8 cellular enhancements &F5 and &F6 commands, 4-15 S91 Register, 4-43 cellular transmit level, 4-17 change S-Register, 4-11 character format, 4-3 problems, A-3, A-7 clock source (AT&X), 4-22...
  • Page 119 COMSPHERE 3800 Series Modems – Model 3830 Index-4 dial tone wait, 4-8 dial-line connection, 2-4 dialing problems, A-5 Directory Location 1 Callback (S67), 4-38 Disconnect Delay Receive Buffer, 4-33 Transmit Buffer, 4-35 display configuration options, 4-22 S-Register, 4-11 DSR Control (AT&S), 4-20...
  • Page 120 (ATH), 4-9 Hayes AutoSync, 4-18 hook flash (!), 4-9 Hook Switch Control (ATH), 4-9 Identification (ATI), 4-10 initialization strings, 2-11 DATAKIT, 2-12 synchronous leased-line applications, 2-11 V.25 bis applications, 2-11 installation Model 3830 modem, 2-2 software, 2-6 November 1996 Index Index-5...
  • Page 121 COMSPHERE 3800 Series Modems – Model 3830 Index-6 Leased Line Carrier On Level (S48), 4-35 Leased Line Rate, 4-34 Leased Line Transmit Level (S45), 4-34 Leased Mode (AT&L), 4-17 leased-line connection, 2-5 leased-line problems, A-8 LEDs (front panel), 1-3 Line Current Disconnect (S65), 4-38 load Active (Operating) area, 4-13 LSD Control (AT&C), 4-14...
  • Page 122 3830-A2-GB91-20 Pause Time (‘‘,’’) (S8), 4-29 P (Pulse dial), 4-8 pin assignments RS-232, C-1 VF connector, C-3 Power LED, A-2 power-up procedure, 2-6 quiet answer (@), 4-9 R (Reverse dial), 4-9 Rate Auto Originate (S36), 4-32 Rate Control (CT111), 4-36...
  • Page 123 COMSPHERE 3800 Series Modems – Model 3830 S-Registers changing, 4-11 displaying, 4-11 list of, 4-28 S0 (Auto-Answer Ring Number), 4-29 S2 (Escape Character), 4-29 S3 (Carriage Return Character), 4-29 S4 (Line Feed Character), 4-29 S5 (Backspace Character), 4-30 S6 (Blind Dial Pause), 4-30 S7 (No Answer Timeout), 4-30 S8 (“,”...
  • Page 124 3830-A2-GB91-20 S85 (Fast Disconnect), 4-42 S88 (Straps When Disconnected), 4-42 S89 (V.42 ARQ Window Size Increase), 4-42 S90 (DTE Rate = VF Rate), 4-43 S91 (Cellular Enhancements), 4-43 S93 (RJ11 Cellular Adapt) self-test AT&T9, 4-21 failure, A-2 power-up, 2-6 Send Break Control (AT\K), 4-25...
  • Page 125 COMSPHERE 3800 Series Modems – Model 3830 V.25 bis applications, 2-11 V.25 bis Coding (S62), 4-37 V.25 bis dialing, 4-18 V.25 bis dialing commands, D-1 V.25 bis Idle Character (S63), 4-37 V.25 bis New Line Character, 4-37 V.29 Train On Data (S92), 4-43 V.32 bis Automode (S78), 4-40...

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