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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-GB91-30
August 1998

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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-GB91-30 August 1998...
  • Page 2 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 For additional information concerning warranty, sales, service, repair, installation, documentation or training, use one of the following methods: 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 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-GB91-30 August 1998 Safety Instructions...
  • Page 6 COMSPHERE 3800 Series Modems – Model 3830 Notices August 1998 3830-A2-GB91-30...

  • 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 If the product needs to be returned to the company service center for repair, contact them directly for return instructions using one of the following methods: 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 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-GB91-30 CAUTION August 1998 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: Table Of Contents

    Related Documents Introduction Overview Features COMSPHERE Model 3830 Modem Front Panel and Status Indicators Model 3830 Modem Installation Overview ........
  • Page 12 COMSPHERE 3800 Series Modems – Model 3830 AT Command Set and S-Registers Overview ........
  • Page 13 List of Figures Figures Model 3830 Front Panel Model 3830 Rear Panel Wiring Diagram – 8-Position to 6-Position Conversion Cable ........
  • Page 14 COMSPHERE 3800 Series Modems – Model 3830 List of Tables Tables Model 3830 LEDs ........

  • Page 15: Preface

    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 16: Related Documents

    Paradyne worldwide office locations, use one of the following methods: 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 17: Introduction

    The modem’s compatibility with a number of dialing methods and protocols, such as asynchronous AT commands and ITU-T V.25bis 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.
  • 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), ITU-T V.32bis (14,400, 12,000, 9600, 7200, and 4800 bps), V.32 (9600 and 4800 bps), V.22bis (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

    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 (Light Emitting Diode 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-GB91-30 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 COMSPHERE 3800 Series Modems – Model 3830 August 1998 3830-A2-GB91-30...

  • Page 23: Model 3830 Modem Installation

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

  • Page 24: Model 3830 Installation

    COMSPHERE 3800 Series Modems – Model 3830 Two ferrite chokes and cable ties Fax software and documentation (if fax option installed) If any hardware components are damaged, notify your service representative. Return equipment using the procedures described in the Government Requirements and Equipment Return of this book.
  • Page 25 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-GB91-30 August 1998...

  • Page 26: 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 27: 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, Assignments.) 1. Insert the 6-position, 4-conductor modular plug into the jack labeled LINE, 2.

  • Page 28: Communications Software Installation

    AT commands. The Model 3830 can be used with any major communications software. 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, S-Registers.

  • Page 29: Selecting Factory Configuration Options

    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 3830-A2-GB91-30 2. Model 3830 Modem Installation NOTE section for these S-Registers). August 1998...
  • Page 30 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: AT&Fy&Wn Where: y is one of the following Factory configurations: 0 for Async Dial...

  • Page 31: Recovering At Commands

    Certain dialing methods, such as V.25bis 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 32 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 33: Initialization Strings

    Note that the character format must be 7 data bits, odd parity, and 1 stop bit: TYPE: PRESS: 3830-A2-GB91-30 2. Model 3830 Modem Installation AT&F &D1 &S1 &M234 &W Enter AT&F &D1 &S1 &M233 &W Enter August 1998...

  • Page 34: 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 35: 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 36 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 37: 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 38: 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...

  • Page 39: 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-GB91-30 4. AT Command Set and S-Registers August 1998...

  • Page 40: 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 41 *** 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-GB91-30 4. AT Command Set and S-Registers Table 4-1...

  • Page 42: 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 Word...

  • Page 43: Model 3830 At Commands

    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. Use this command when AT commands are disabled or the modem is operating in Synchronous data mode.
  • Page 44 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 AT Commands 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 45 4. AT Command Set and S-Registers Table 4-2 (3 of 23) 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 46 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 AT Commands 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.
  • Page 47 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. Q0 Enables modem to send result codes to the DTE.
  • Page 48 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 AT Commands Extended Result Code, Dial Tone Detect, and Busy Tone Detect The X n command sets three configuration options simultaneously: Result Code X0 Disable X1 Enable X2 Enable X3 Enable...
  • Page 49 4. AT Command Set and S-Registers Table 4-2 (7 of 23) 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 50 COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (8 of 23) 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 51 Model 3830 AT Commands &D n DTR Action Data Terminal Ready (DTR) is a signal from the DTE to the modem indicating that the DTE is connected and ready for operation. &D0 Ignore. Modem ignores the true status of DTR and treats it as always ON.
  • Page 52 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 AT Commands &F n Select Factory Default Configuration Options (cont’d) If ETC is installed and your modem is attached to a cellular telephone, use the &F5 command to configure the modem for cellular communications.
  • Page 53 4. AT Command Set and S-Registers Table 4-2 (11 of 23) 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. If Enhanced Throughput Cellular (ETC) is installed, &I99 and &I100 causes the level...
  • Page 54 COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (12 of 23) 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 55 4. AT Command Set and S-Registers Table 4-2 (13 of 23) Model 3830 AT Commands &R n RTS Action Request-to-Send (RTS) is a signal from the DTE to the modem indicating the DTE has data to send to the modem.
  • Page 56 COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (14 of 23) 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 57 4. AT Command Set and S-Registers Table 4-2 (15 of 23) 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 58 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 AT Commands &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 59 Model 3830 AT Commands &Z n =x Store Telephone Numbers Modem saves the telephone number and dial command modifiers (if any) entered for x (up to 40 characters in length) in Directory Location n (1–10). The DS command dials numbers stored this way.
  • Page 60 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 AT Commands \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.
  • Page 61 Model 3830 AT Commands \K n Buffer Control, Send Break Control, Break Forces Escape The \K n command sets three configuration options simultaneously: Control Discard Data Discard Data Keep Data Keep Data Keep Data Keep Data Discard Break BREAK BUFFER CONTROL Determines if data stored in the modem’s buffer is saved or discarded...
  • Page 62 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 AT Commands Error Control Mode Determines the type of error control used by the modem. In most cases, V42/MNPorBfr is the best choice. If V.42bis and MNP are enabled, then the modem uses the following priority for error control negotiation: V.42bis, V.42, MNP 5 and below.
  • Page 63 4. AT Command Set and S-Registers Table 4-2 (21 of 23) 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 64 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 AT Commands Modulation and Data Rate Sets the modulation and maximum VF rate. The %B300 and %B1200 commands work in conjunction with the B (ITU-T/ Bell Mode) command to determine modulation.
  • Page 65 Model 3830 AT Commands MNP5 Data Compression Determines if the modem uses MNP Class 5 data compression. It can be set independently of V.42bis data compression. Online changes do not take effect until a disconnect occurs. %C0 Disable. %C1 Enable.

  • Page 66: Model 3830 S-Registers

    COMSPHERE 3800 Series Modems – Model 3830 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 67 Model 3830 S-Registers AT Escape Character Determines ASCII value used for escape sequence to enter Command mode from Data mode. Enter a value from 0 to 127 for the escape character. Any value greater than 127 causes the modem to disable the escape sequence. When the escape sequence is disabled, the modem cannot return to Command mode until the call is disconnected.
  • Page 68 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 S-Registers Blind Dial Pause Determines how long (in seconds) the modem waits after going off-hook before dialing a telephone number if using result code X0, X1, or X3. Enter a value from 2–255 seconds.
  • Page 69 Model 3830 S-Registers Test Timeout Sets the duration (in seconds) for the modem tests. This automatically cancels any test in progress after the time of this register expires. Any test can be manually canceled by issuing the escape sequence (+++) followed by the &T0 command.
  • Page 70 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 S-Registers Auto Redial (Leased Line) Auto Redial allows repeated automatic dial backup attempts by specifying the range of Directory Locations that can be tried. A redial attempt is made in response to a bad phone number, a busy signal, no answer, or no quiet answer.
  • Page 71 Model 3830 S-Registers Auto Redial Works in conjunction with the Bad Lines Auto Originate and Rate Auto Originate options. It allows repeated automatic dial backup attempts by specifying the range of Directory Locations that can be tried. The modem must be in Originate mode.
  • Page 72 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 S-Registers Receive Buffer Disconnect Delay Determines the maximum amount of time the modem can continue to send data in its Receive Buffer to the DTE after the modem is commanded by the DTE to disconnect, or after the modem detects a line disconnect.
  • Page 73 Model 3830 S-Registers V.32bis Train Register controls the modem’s train time for V.32bis/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 74 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 S-Registers Bad Lines Auto Originate Register determines if the modem performs an automatic dial backup if the leased lines fail. Register has the following values: 0 = Disable 1 = 30 seconds...
  • Page 75 Model 3830 S-Registers Leased Line Carrier On Level Determines if the modem disconnects if the carrier signal on leased lines falls below –26 dBm or –43 dBm. Register has the following values: 0 = –43 dBm 1 = –26 dBm Factory setting is –43 dBm.
  • Page 76 0 = Peripheral 1 = Intermediate Factory setting is Peripheral. 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 77 Model 3830 S-Registers Remote Access Password Register allows entry of the second of digits of a remote access password. Any value from 00 to 99 is valid. For example, if the remote access password is 12345678, then S57=34. Remote Access Password Register allows entry of the third of digits of a remote access password.
  • Page 78 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 S-Registers V.25bis Coding Identifies to the modem the type of coding used by the DTE while in V.25bis mode. Register has the following values: 0 = ASCII 1 = EBCDIC Factory setting is ASCII.
  • Page 79 Model 3830 S-Registers 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 80 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 S-Registers Make Busy Via DTR Determines if the modem goes off-hook (busy) when DTR is Off. Register has the following values: 0 = Disable 1 = Enable Factory setting is Disable.
  • Page 81 Model 3830 S-Registers DTR Alarm Reporting Register determines whether an alarm is sent to the 6800 Series Network Management System controller when the DTR signal has been Off for more than 10 seconds. Register has the following values: 0 = Disable 1 = Enable V.32bis Automode (Dial Line)
  • Page 82 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 S-Registers No Data Disconnect Trigger Signal Register determines whether Pin 2 (transmit data) or Pin 3 (receive data) of the modem’s EIA-232 serial interface is monitored so that the modem can disconnect the call if there is no activity for a certain period. (See the \T command.)
  • Page 83 Model 3830 S-Registers AT Command Mode Determines how the modem responds to valid and invalid AT commands. The selections No ERROR and No Strap or ERROR permit installation into applications that are customized for a different modem. Register has the following values: 0 =Normal.
  • Page 84 COMSPHERE 3800 Series Modems – Model 3830 Model 3830 S-Registers V.42 ARQ Window Size Increase Register allows the V.42 Automatic Request for Transmission (ARQ) window size to be set to a value from 6 to 15 frames to accommodate satellite delays.
  • Page 85 Model 3830 S-Registers Cellular Enhancements Valid only if Enhanced Throughput Cellular (ETC) is installed. Register determines whether parameters are set to improve performance over a cellular link. Should be enabled when the remote modem is using a cellular connection. Register has the following values:...
  • Page 86 COMSPHERE 3800 Series Modems – Model 3830 4-50 August 1998 3830-A2-GB91-30...
  • Page 87 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 88: 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 89: Modem - Dte Connection

    Modem – DTE Connection Symptom Modem does not accept or echo back AT commands 3830-A2-GB91-30 Table A-2 Action Verify that the cable between the Async port of the DTE and the modem is a standard EIA-232 cable. If the cable is bad, replace it.

  • Page 90: Modem - Vf Connection

    COMSPHERE 3800 Series Modems – Model 3830 Modem – VF Connection 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)
  • Page 91 Table A-3 (2 of 4) Action Verify that originating modem supports your modem’s modulation schemes. The 3830 modem recognizes V.32 terbo, CCITT V.32bis, V.32, V.22bis, V.22, V.21, Bell 212A, and Bell 103J. The 3800 Series modem does not support other vendors’ proprietary modulation schemes.
  • Page 92 COMSPHERE 3800 Series Modems – Model 3830 Modem – VF Connection 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...

  • Page 93: Online Operation

    Symptom Data scrambled or unreadable Missing data during a transfer 3830-A2-GB91-30 Table A-3 (4 of 4) Action The remote modem may be in a forced Error Control mode (disconnect if there is no error control). Reconfigure your modem to V.42/MNP or Buffer and try again.

  • Page 94: Leased-Line Operation

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

  • Page 95: 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-GB91-30 Technical Specifications .........

  • Page 96: Model 3830 Technical Specifications

    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) ITU-T V.32bis (14,400, 12,000, 9600, 7200,...
  • Page 97 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-GB91-30 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 98 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 99: Pin Assignments

    – 3830-A2-GB91-30 ........

  • Page 100: Eia-232-D Pin Assignments

    COMSPHERE 3800 Series Modems – Model 3830 EIA-232-D Pin Assignments RS-232 Name Circuit +10V –10V – CT112 – – – CT141 CT140 Table C-1 (2 of 3) Signal CCITT Source – – – – – – – – – –...
  • Page 101 (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-GB91-30 Table C-1 (3 of 3) Signal CCITT Source...
  • Page 102 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 103: 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 Phone Pin No. Connector 6-pin/8-pin (J6) –...
  • Page 104 COMSPHERE 3800 Series Modems – Model 3830 August 1998 3830-A2-GB91-30...
  • Page 105 ITU-T V.25bis 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.25bis request and answer commands that initiate and cancel dialing, program commands that allow you to create and enter telephone numbers to memory, and list commands that display all telephone numbers stored in directory locations.

  • Page 106: Call Request Commands

    COMSPHERE 3800 Series Modems – Model 3830 The following section discusses those V.25bis 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.25bis command and response and the analogous AT command.

  • Page 107: 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-GB91-30 D. CCITT V.25 bis Dialing Commands and Response CRNn n is the dial string. The following characters are...

  • Page 108: 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 109: 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-GB91-30 D. CCITT V.25 bis Dialing Commands and Response August 1998...

  • Page 110: 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 111: Command Response

    V.25bis command from the DTE. INV is similar to the AT result code ERROR. The INV response format is: Where: Table D-1 lists V.25bis commands supported by the Model 3830 modem. 3830-A2-GB91-30 D. CCITT V.25 bis Dialing Commands and Response INVxx...

  • Page 112: V.25Bis Commands

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

  • Page 113: V.25Bis Response Messages

    Table D-2 lists V.25bis response messages supported by the Model 3830 modem. V.25bis Response Messages V.25bis Command COMMAND RESPONSE 3830-A2-GB91-30 D. CCITT V.25 bis Dialing Commands and Response Table D-2 AT Command/Result Description CALL RESPONSE Call Failure Indication BUSY, NO ANSWER,...

  • Page 114: Comsphere 3800 Series Modems – Model

    COMSPHERE 3800 Series Modems – Model 3830 D-10 August 1998 3830-A2-GB91-30...
  • Page 115 Answer mode ASCII Async Dial 3830-A2-GB91-30 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 116 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 117 Class 2 fax command line Command mode configuration option connector 3830-A2-GB91-30 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 118 COMSPHERE 3800 Series Modems – Model 3830 Customer 1 Customer 2 data carrier data compression Data mode DB-25 connector demodulation dial command modifiers Glossary-4 A user-defined configuration area containing customized configuration options for a specific application. A user-defined configuration area containing customized configuration options for a specific application.
  • Page 119 EIA-232-D EIA RS-366-A EPROM 3830-A2-GB91-30 A communications circuit that is established by a switched circuit connection in the dial network. See PSTN. A series of characters that consists of numbers and modifiers used to dial a telephone number.
  • Page 120 COMSPHERE 3800 Series Modems – Model 3830 error control escape sequence extended result codes fax modem fax software full-duplex Group III half-duplex handshaking host HDLC Glossary-6 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 121 ITU-T V.25 bis ITU-T V.27 ter ITU-T V.29 ITU-T V.32 ITU-T V.32 bis 3830-A2-GB91-30 A unit of frequency (hertz) that equals one cycle per second. The Telecommunications Standardization Sector of the International Telecommunications Union, an advisory committee established by the United Nations to recommend communications standards and policies.
  • Page 122 COMSPHERE 3800 Series Modems – Model 3830 ITU-T V.42 ITU-T V.42 bis ITU-T V.54 leased line local analog loopback long space disconnect loopback test modem Glossary-8 ITU-T standard for error control protocol. ITU-T standard for data compression. ITU-T standard for local and remote diagnostic loopback tests.
  • Page 123 3830-A2-GB91-30 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 124 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 125 UNIX Dial USOC XOFF 3830-A2-GB91-30 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 126 COMSPHERE 3800 Series Modems – Model 3830 Glossary-12 August 1998 3830-A2-GB91-30...
  • Page 127 Index 3830-A2-GB91-30 August 1998 Index-1...
  • Page 128 COMSPHERE 3800 Series Modems – Model 3830 Index-2 August 1998 3830-A2-GB91-30...
  • Page 129 Index 3830-A2-GB91-30 August 1998 Index-3...
  • Page 130 COMSPHERE 3800 Series Modems – Model 3830 Index-4 August 1998 3830-A2-GB91-30...
  • Page 131 Index 3830-A2-GB91-30 August 1998 Index-5...
  • Page 132 COMSPHERE 3800 Series Modems – Model 3830 Index-6 August 1998 3830-A2-GB91-30...
  • Page 133 Index 3830-A2-GB91-30 August 1998 Index-7...
  • Page 134 COMSPHERE 3800 Series Modems – Model 3830 Index-8 August 1998 3830-A2-GB91-30...
  • Page 135 Index 3830-A2-GB91-30 August 1998 Index-9...
  • Page 136 COMSPHERE 3800 Series Modems – Model 3830 Index-10 August 1998 3830-A2-GB91-30...
  • Page 137 Index 3830-A2-GB91-30 August 1998 Index-11...
  • Page 138 COMSPHERE 3800 Series Modems – Model 3830 Index-12 August 1998 3830-A2-GB91-30...

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