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Multitech CommPlete MT3334HD8 User Manual

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  • Page 1 MT3334HD8 Modem User Guide...
  • Page 2 Furthermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes from time to time in the content hereof without obligation of Multi-Tech Systems, Inc., to notify any person or organization of such revisions or changes.

  • Page 3: Fcc Regulations For Telephone Line Interconnection

    FCC Regulations for Telephone Line Interconnection 1. No repairs are to be made by you. Repairs are to be made only by Multi-Tech Systems or its licensees. Unauthorized repairs void registration and warranty. Contact Multi-Tech Systems, Inc. for details of how to have repairs made.

  • Page 4: Canadian Limitations Notice

    FCC Fax Warning The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a computer or other electronic device to send any message via a telephone fax machine unless such message clearly contains in a margin at the top or bottom of each page or the first page of the transmission, the date and time it is sent and an identification of the business or other entity, or other individual sending the message and the telephone number of the sending machine or such business, other entity, or individual.

  • Page 5: Table Of Contents

    Table of Contents 1 Introduction Introduction ... 2 LED Indicators... 2 Power Supply... 2 Manual Organization... 3 Technical Specifications... 6 2 Installation Introduction ... 8 Safety Warnings... 8 Pre-Installation Notes ... 9 Installation Procedure... 9 3 AT Commands Working with AT Commands ...12 Modes of Operation ...12 Command Structure ...12 Command Editing...13...
  • Page 6 5 Testing the MT3334HD8 Introduction ...54 Local Analog Loopback Test (V.54 Loop 3) ...54 Remote Digital Loopback Test (V.54 Loop 2) ...55 Local Digital Loopback Test (V.54 Loop 2) ...57 6 Warranty, Service, and Technical Support Limited Warranty...60 Service...61 Technical Support ...61 Recording Product Information ...61...
  • Page 7 1 Introduction CommPlete Communications Server...

  • Page 8: Introduction

    Communications Server’s MR9600 controller, which can support and control up to 12 cards per rack. Users dial into the MT3334HD8’s modems through a T1 daughter card on the RASCard that controls the segment. There are no external connectors on the MT3334HD8.

  • Page 9: Manual Organization

    This chapter provides an introduction to MT3334HD8 command mode fundamentals, followed by a detailed explanation of each AT command, providing examples where applicable. Chapter 4 S-Registers This chapter describes the MT3334HD8’s S-registers, which are used to store various modem options. Each S-register is defined and explained. Chapter 5 Testing the MT3334HD8 This chapter describes loopback testing for the MT3334HD8.
  • Page 10 MT3334HD8 User Guide Technical Specifications Model Number Data Rates (Modem) Eight independent modems (Modem A, B, C, D, E, F, G, H), each operating at Data Rates (Fax) Data Format (Modem) Configuration Compatibility (Modem) ITU-T V.42bis, V.42, V.34plus, V.34, ITU-T V.32bis, V.32, V.25bis, V.21,...

  • Page 11: Serial Interface

    (2400 & 1200 bps) Carrier Frequencies: Bell 103/113 (300 bps) Carrier Frequencies: V.21 Carrier Frequencies: V.23 Fax Modulations Fax Carrier Frequencies Transmit Level Frequency Stability Receiver Sensitivity -43 dBm under worst case conditions AGC Dynamic Range 43 dB Serial Interface Diagnostics Firmware Upgrades Flash memory;...

  • Page 12: Technical Specifications

    MT3334HD8 User Guide Power Requirements Power Consumption Approximately 6 watts Dimensions Weight Limited Warranty Fuses 5 VDC at 0.95 A ±16 VDC at 0.1 A 23.3 × 2.3 × 29.2 cm (9.2 × 0.9 × 11.5 in.) H × W × D 1.1Kg (2.5 lb.)

  • Page 13: Installation

    Installation CommPlete Communications Server...

  • Page 14: Introduction

    Server CC9600 chassis. This equipment should be installed only by a qualified service person. The MT3334HD8 assembly consists of a high-density modem card and a front panel. Figure 1 shows the layout of the MT3334HD8 card. The MT3334HD8 assembly plugs into power and data, Ethernet, and T1 bus connectors on the inside of the CC9600 chassis.

  • Page 15: Pre-Installation Notes

    Technical Support for instructions. 2. Turn off both PS9600 power supplies. 3. The MT3334HD8 must be installed in a segment in which a RASCard with a T1 module is installed. Remove a blank device panel or previous MT3334HD8 card from that segment.

  • Page 17: At Commands

    AT Commands CommPlete Communications Server...

  • Page 18: Working With At Commands

    A MT3334HD8 modem is in command mode when it is not dialing or online. When it is in command mode, you have access to a complete communications system that allows you to use several features, including the basic AT command set described in this chapter.

  • Page 19: Command Editing

    To cancel an entire command that has been typed but not yet executed, press C command buffer. The effect is the same as backspacing the command, only quicker. The MT3334HD8 stores characters entered in a command in the modem’s command buffer until they are executed by pressing E (AT) do not count in the 60 allowed command characters.
  • Page 20 MT3334HD8 User Guide Table 1. AT Commands by Function Topic Dialing Action Dial Modifiers Phone Number Memory Configuration Storage & Recall Modem Responses (Result Codes) Online Connection V.34 Controls RS-232 Interface Controls Command Description Dial Continuous redial On-hook/off-hook Pulse dialing...
  • Page 21 Error Correction & Data Compression Speed Controls Immediate Action Flow Control Escape Sequences Remote Configuration Line Probes Diagnostics CommPlete Communications Server &E0 Non-error correction mode &E1 Auto-reliable mode &E2 Reliable mode &E14 Data compression disabled &E15 Data compression enabled V.42 error correction modes V.42 error correction at 300 bps Auto-reliable buffering Auto-reliable fallback character enable...

  • Page 22: Dialing Commands

    ATD5551212<CR>, the modem dials the number 555-1212. The MT3334HD8 supports several dialing methods. With the D command, you can specify either pulse (ATDP) or tone (ATDT) dialing. You can also modify the dialing command with several characters that are explained in “Dial Modifier Commands”...
  • Page 23 Pulse or Tone Dialing Default: P The MT3334HD8’s modems can dial numbers by using pulse dialing, tone dialing, or a combination of both methods. Pulse dialing, used by rotary-dial telephones, uses the timed opening and closing of a relay to encode the numbers. Tone dialing, used by push-button (touch-tone) telephones, uses dual tone multifrequency (DTMF) dialing.
  • Page 24 MT3334HD8 User Guide Reverse Originate/Answer Mode n = 0 or 1 Default: R0 The R command lets you reverse the modem’s mode of operation from originate to answer, or from answer to originate; for example, if you need the modem to answer the phone but then go into originate mode.

  • Page 25: Phone Number Memory Commands

    Quiet Answer Use the @ command to access a system that does not provide a dial tone. The @ command causes the modem to wait before processing the next character in the dialing string. The wait is for one or more rings back followed by five seconds of silence.

  • Page 26: Configuration Storage And Recall Commands

    Configuration Storage and Recall Commands The MT3334HD8 stores parameters in two places. It stores factory default parameters in read-only memory (ROM), and customized parameters in nonvolatile random access memory (NVRAM). You can- not change the default parameters in ROM;...

  • Page 27: Modem Response (Result Code) Commands

    Modem Response (Result Code) Commands The MT3334HD8’s modems can give responses to commands. The most common one is OK , but the modems also can alert you or your software to dial tones, busy signals, connection speeds, and whether the connection is made with error correction or compression enabled.
  • Page 28 MT3334HD8 User Guide Echo Command Mode Characters n = 0 or 1 Default: E1 Normally, when you type commands on the keyboard, the modem echoes the characters back to the computer or terminal, which displays them on the monitor. Use the E command to turn this feature off and on.
  • Page 29 = 0 or 1 Default: &Q0 The MT3334HD8 gives you a choice between Multi-Tech result codes and standard AT command set responses. Multi-Tech result codes give you more information, but some datacomm programs may not be able to use them, in which case, select the standard result codes.

  • Page 30: Online Connection Commands

    Default: #A0 An MT3334HD8 modem can operate as a 33,600 bps, 28,800 bps, 19,200 bps, 14,400 bps, 9600 bps, 4800 bps, 2400 bps, or 300 bps modem. Use the #A command to select the speed that the modem uses for initial handshaking and subsequent speed selection.
  • Page 31 %DCn AT Command Control n = 0 or 1 Default: %DC0 The %DC command allows you to disable the modem’s ability to respond to AT commands. It can be used with auto answer applications in which no call origination is required, with some UNIX applications, and with other applications that require you to disable the modem’s command mode.
  • Page 32 = 0 or 1 Default: *H0 The *H1 command causes the MT3334HD8 to remain out of service and return a busy signal until configuration from the CommPlete Communication Server’s dedicated management console has finished. If no configuration option is set on the dedicated management console, the MT2834MR remains out of service for ten seconds after disconnect.
  • Page 33 &P1 sets a pulse dial ratio of 67 ms break to 33 ms make. &RDn Square Wave Ring Detect n = 0 or 1 Default: &RD0 (U.K. and International models) &RD1 (North American models) The ring back sound that you hear when you dial a number is generated at the local telephone office or PBX.

  • Page 34: V.34 Commands

    MT3334HD8 User Guide Long Space Disconnect n = 0 or 1 Default: Y0 When two modems are connected in reliable mode, a link disconnect request packet is sent to request a disconnect. In non-error correction mode, there is no “polite” way to request a disconnect. As a result, some “garbage”...

  • Page 35: Rs-232 Interface Commands

    RS-232 Interface Commands These commands define how an MT3334HD8 modem will use and respond to standard RS-232 signals. &Cn Carrier Detect Control n = 0, 1, 2, or 4 Default: &C1 The &C command lets you control the Carrier Detect (CD) signal on the RS-232/V.24 interface. Normally, CD goes high when the modem detects a carrier on the communications link, and drops when it loses the carrier.
  • Page 36 MT3334HD8 User Guide &Rn Clear to Send Control n = 0, 1, or 2 Default: &R1 The &R command lets you control the state of the Clear to Send (CTS) signal on pin 5 of the RS-232/V.24 interface. Normally, CTS follows RTS when the modem is online. You have three choices. You can force the signal high, allow it to act normally, or set it to stay high until the modem disconnects, go low momentarily, and then go high again.

  • Page 37: Error Correction And Data Compression Commands

    Error Correction and Data Compression Commands You can configure a modem to any of three different V.42 modes of operation (each mode can be with or without compression). They are the non-error correction, auto-reliable, and reliable modes. You can also turn data compression on or off.
  • Page 38 MT3334HD8 User Guide V.42 Error Correction at 300 bps n = 0 or 1 Default: $E0 At 300 bps, error correction is not normally used. $E0 disables 300 bps/V.42 error correction altogether. $E1 enables the modem to function at 300 bps in non-error correction (&E0), auto-reliable (&E1), or reliable (&E2) mode.

  • Page 39: Speed Conversion Commands

    Speed Conversion Commands Speed conversion allows the MT3334HD8 to communicate at a fixed speed through the serial port while communicating at an independent speed over the online communications link. Speed conversion is necessary for data compression, since data compression requires data to be sent from the computer to the modem at a rate up to four times faster than the modem’s transmission speed.
  • Page 40 For example, if the MT3334HD8 is set for 14,400 bps and calls another modem that has a top speed of 2400 bps, it will drop to 2400 bps.

  • Page 41: Immediate Action Commands

    ATI1 requests the modem’s firmware version number. You can use this command to identify your modem’s firmware level when calling Technical Support. ATI2 requests the product name, such as MT3334HD8. ATI5 requests the digital signal processor version number. L5, L7 List Current Operating Parameters Default: none The L5 and L7 commands cause your modem to list its current operating parameters.

  • Page 42: Flow Control Commands

    Default: $EB0 The MT3334HD8 can operate with either a 10-bit format (one start bit, seven data bits, one parity bit, and one stop bit) or an 11-bit format (one start bit, eight data bits, one parity bit, and one stop bit) in both command and online modes.
  • Page 43 = 8 or 9 Default: &E8 If the MT3334HD8 is used with Hewlett Packard (or compatible) equipment, it can be configured to respond to ENQ/ACK pacing as a complement to any other form of active flow control or pacing. In that case, pacing from the Hewlett Packard equipment is processed according to the HP protocol.
  • Page 44 MT3334HD8 User Guide When two modems are connected in non-error correction mode, XON/XOFF flow control can be used as a complement to XON/ XOFF pacing. &E10 disables non-error correction mode flow control. &E11 enables non-error correction mode flow control. &En...

  • Page 45: Escape Sequences

    For example, to hang up the modem at the end of a call, type +++ATH <CR>. <BREAK>AT<CR> Out-of-Band Escape Sequence The MT3334HD8 provides an alternate escape method that uses a break signal as the escape code. The break signal— ten or more zero bits issued by data communications software—allows the DTE to signal the modem without the risk of the modem interpreting data characters as modem control characters.

  • Page 46: Remote Configuration Commands

    The remote modem responds by displaying a menu and asking for a setup password. The MT3334HD8 has two default passwords. Please note that if you change them, you cannot retrieve them by resetting the modem by using AT&W1; you must know the new passwords to make any further changes.

  • Page 47: Line Probe Commands

    This process takes about five seconds. The following commands apply to the MT3334HD8 modems only when they are in V.34 mode. %DPn Read Line Probe Data...

  • Page 48: Diagnostic Commands

    The U command selects a loopback test, while the &T command enables a modem to respond to a loopback test from another modem. See Chapter 5, “Testing the MT3334HD8,” for a fuller discussion. Refer to the L8 command to see how to list the diagnostic online status.
  • Page 49 Loopback tests send data through the modem in such a way that it loops back to the terminal where it was entered, testing all the circuits along the way. The U command selects from several loopback tests. See Chapter 5, “Testing the MT3334HD8,” for more information. ATU0 places the modem in originate mode for the local analog loopback test.
  • Page 50 MT3334HD8 User Guide CommPlete Communications Server...

  • Page 51: 4 S-Registers

    4 S-Registers CommPlete Communications Server...

  • Page 52: Introduction

    MT3334HD8 User Guide Introduction This chapter describes the MT3334HD8’s S-registers , which are small regions of memory where modem configuration information is stored. Whereas AT commands tell a modem what to do, S-registers tell the modem how or when to do it. Each S-register has a name that consists of the letter S and a number (S0, S1, S2, etc.), hence the term S-register .
  • Page 53 S3 defines the carriage return character by its decimal ASCII code. The default setting is the ^M character (decimal 13), which is the code for the E character. Note: If you change the S3 value, you must make corresponding changes in your data communications software.
  • Page 54 MT3334HD8 User Guide S8 determines the length of the pause caused by a comma in a dialing command. The default setting is two seconds for the North American model, and four seconds for the International and U.K. models. S8 may be set for up to 255 seconds.
  • Page 55 Some PBX and CBX phone systems require the modem’s DSR, CTS, and/or CD signals to drop briefly when calls are disconnected. The MT3334HD8’s &R, &S, and &C commands can cause the modem to drop these signals for a specified time upon disconnect, and then bring the signals up again. S24 defines the length of time that the signals drop.
  • Page 56 MT3334HD8 User Guide S36 sets the time between when DTR goes inactive and when the modem goes off-hook. The DTR busy-out feature is disabled when S36 is set to 0. Normally, when the DTR signal from the computer goes inactive, the modem goes on-hook after a time that is set by S25.

  • Page 57: Reading And Assigning S-Register Values

    For maximum throughput, the MT3334HD8’s default configuration is for originating a call to another 33,600 bps modem that supports error correction, data compression, and flow control. If the receiving modem is not compatible, the MT3334HD8 can match any ITU-T or Bell standard modem (but not proprietary protocols).
  • Page 58 MT3334HD8 User Guide The &W0 (or &W) command stores all current AT command and S-register values into nonvolatile random access memory (NVRAM) and configures the modem so that it reads your custom settings in NVRAM when the modem is turned on or when it is reset with the Z command. (The &F reset command will continue to read the factory default settings in read-only memory [ROM] unless you also store the &F9 command.

  • Page 59: Testing The Mt3334Hd8

    5 Testing the MT3334HD8 CommPlete Communications Server...

  • Page 60: Introduction

    MT3334HD8 User Guide Introduction Each time you power up the MT3334HD8, it performs an automatic self-test to ensure proper operation. The MT3334HD8 also has three diagnostic tests: local analog loopback, digital loopback (remote/automatic), and digital loopback (local/manual). These ITU-T V.54 loopback tests isolate telephone circuit and transmission problems.

  • Page 61: Remote Digital Loopback Test (V.54 Loop 2)

    ENTER Figure 3. Remote digital loopback test. Test procedure 1. Arrange to have &T4 set on the remote test modem. CommPlete Communications Server Local MultiModem Remote MultiModem Computer or Terminal Digital Analog Analog Digital 5 Testing the MT3334HD8 NTER...
  • Page 62 MT3334HD8 User Guide 2. Open your communications software and go into terminal mode. Type AT and press E should get an OK message. Type AT&E0<CR> to disable error correction. 3. Dial the remote modem and establish your online connection. 4. Type the escape sequence (+++AT<CR> or <BREAK>AT<CR>) to bring your modem into command mode while maintaining the connection with the remote modem.

  • Page 63: Local Digital Loopback Test (V.54 Loop 2)

    Remote MultiModem Computer or Terminal Digital Analog Analog Digital . Once you receive an OK message from your modem (if responses are NTER to hang up. NTER 5 Testing the MT3334HD8 UUUUU UUUUU ; you NTER . If you NTER...

  • Page 65: 6 Warranty, Service, And Technical Support

    6 Warranty, Service, and Technical Support CommPlete Communications Server...

  • Page 66: Limited Warranty

    MT3334HD8 User Guide Limited Warranty Multi-Tech Systems, Inc. (“MTS”) warrants that this product will be free from defects in material or workmanship for a period of two years from the date of purchase, or, if proof of purchase is not provided, two years from date of shipment.

  • Page 67: Service

    2439 (USA and Canada) or (612) 785-3500 (local and international). Please record MT3334HD8 information in the spaces provided below, and have it available when you call. If your MT3334HD8 requires service, the technical support specialist will guide you on how to send it in.

  • Page 68: The Multi-Tech Bbs

    MT3334HD8 User Guide The Multi-Tech BBS Multi-Tech maintains a bulletin board system (BBS) for its customers. Information available from the BBS includes new product information, product upgrade data, and problem-solving tips. There is also a - message service that lets you request additional information. The phone number for the Multi-Tech BBS is (800) 392-2432 (USA and Canada) or (612) 785-3702 (local and international).

  • Page 69: Reading A Message

    6. Select a file transfer protocol by typing the indicated letter, such as Z for Zmodem (the recommended protocol). 7. If you select Zmodem, the file will transfer automatically. If you select another protocol, you may have to initiate the transfer yourself. (In most communications programs, the P initiates the download.) 8.

  • Page 70: About The Internet

    MT3334HD8 User Guide About the Internet Multi-Tech is a commercial provider on the Internet, and we retrieve e-mail messages from the following mailboxes on a periodic basis: tsupport@multitech.com Technical Support mtsmktg@multitech.com mtssales@multitech.com Sales Dept. international@multitech.com writers@multitech.com Publications Dept. Multi-Tech's presence includes a Web site at: http://www.multitech.com...

  • Page 71: Upgrading The Mt3334Hd8 Firmware

    3. Run FlashPro by typing flashpro and pressing E 4. Highlight the Configure option in the Main Menu, and press E select the COM port to which the MT3334HD8 is attached. Highlight Baud Rate and select the rate you want to program at. Press E 5.
  • Page 72 MT3334HD8 User Guide CommPlete Communications Server...
  • Page 73 Appendixes CommPlete Communications Server...

  • Page 74: Appendix A Ascii Conversion Chart

    MT3334HD8 User Guide Appendix A ASCII Conversion Chart CTRL CODE Null, or all zeros Start of Header Start of Text End of Text End of Transmission Enquiry Acknowledge Bell or Alarm Backspace Horizontal Tab Line Feed HEX DEC CODE HEX DEC CODE HEX DEC CODE HEX DEC "...

  • Page 75: Appendix B Dial Pulses And Tones

    Appendix B Dial Pulses and Tones Dial Pulses When you pulse dial, as when you make a call with a rotary dial telephone, your telephone or modem generates codes in the form of pulses that simulate the opening and closing of old-fashioned electric relays, or switches.
  • Page 76 MT3334HD8 User Guide Figure B-2. Standard DTMF frequencies The extended DTMF characters (A, B, C, D) are the high-end frequencies (1633 Hz) defined on some telephone sets with a fourth vertical column of buttons. This fourth column provides for extended PBX control functions.

  • Page 77: Appendix C Result Code Summary

    Appendix C Result Code Summary Multi-Tech Result Codes (&Q0) Terse Verbose CONNECT RING NO CARRIER ERROR CONNECT 1200 NO DIALTONE BUSY NO ANSWER CONNECT 2400 CONNECT 4800 CONNECT 9600 CONNECT 14400 CONNECT 19200 CONNECT 21600 CONNECT 1275 CONNECT 24000 CONNECT 26400 CONNECT 28800 CONNECT 31200 CONNECT 33600...
  • Page 78 MT3334HD8 User Guide LAP-M Reliable Mode. If the modem connects using LAP-M error correction, the word LAPM or letter L is added to the CONNECT responses as follows: Connect LAPM Connect 1200 LAPM Connect 2400 LAPM Connect 4800 LAPM Connect 9600 LAPM...

  • Page 79: Appendix D S-Register Summary

    Appendix D S-Register Summary Register Unit 1 ring 1 ring decimal decimal decimal decimal 1 sec 1 sec 1 sec 100 ms 100 ms 1 ms decimal 10 ms 50 ms 100 ms 1 min. 100 ms 1 char- acter 1 sec 1 sec CommPlete Communications Server...
  • Page 80 MT3334HD8 User Guide Register Unit decimal decimal 1 sec * Values for International and Canadian modems only. † Values for International modems only. ‡ Values for UK modems only. Range Default Description 33, 31, Sets fixed V.34 connect speed. 28 = 28800 bps;...

  • Page 81: Appendix E At Command Summary

    Appendix E AT Command Summary Command RETURN &An &BSn CommPlete Communications Server Values Description Attention Code The attention code precedes all command lines except A/, A: and escape codes. RETURN Key Press the RETURN (ENTER) key to execute most commands. Force Answer Mode Answer call immediately without waiting for ring.
  • Page 82 MT3334HD8 User Guide Command $BAn &Cn &CDn DsNd &Dn %DCn %DFn %DPn Values Description n = 0 or 1 Baud Adjust *** $BA0 Set baud adjust off, speed conversion on. (Serial port speed is independent of modem data rate.) $BA1 Set baud adjust on, speed conversion off.
  • Page 83 Command >DTn &En $EBn CommPlete Communications Server Values Description n = 0 or 1 DTMF Detection *** >DT0 Disable DTMF detection. >DT1 Enable DTMF detection when off-hook. n = 0 or 1 Echo Command Mode Characters Do not echo command mode characters. *** E1 Do echo command mode characters.
  • Page 84 MT3334HD8 User Guide Command &Fn &Gn Values Description n = 0–5 Escape Sequence Options %E0 Modem won’t escape. *** %E1 +++ method %E2 Break method. %E3 Either +++ or break methods. *** %E4 No OK response to +++. %E5 OK response to +++.
  • Page 85 Command #I=x CommPlete Communications Server Values Description n = 0, 1, 2, Inquire Product Codes or 5 Request modem ID #. Request firmware revision #. Request modem description. Request DSP version. x = password Enter Login Password Password is case sensitive. x = password Store Login Password Password must be 6–10 characters long, and may...
  • Page 86 MT3334HD8 User Guide Command $MBn NdNe... &Pn &Qn Values Description n = speed Modem Baud Rate $MB75 Select ITU-T V.23 mode. $MB300 Select 300 bps on line. $MB1200 Select 1200 bps on line. $MB2400 Select 2400 bps on line. $MB4800 Select 4800 bps on line.
  • Page 87 Command &Rn &RAn &RDn &RFn &RN &RP &RR Sr=n &Sn CommPlete Communications Server Values Description n = 0, 1, or 2 Clear to Send Control &R0 Let CTS state follow RTS state when online. *** &R1 Force CTS high (on). &R2 Let CTS drop on disconnect for time set by S24, then go high again.
  • Page 88 MT3334HD8 User Guide Command &SFn $SBn #S=y &Tn Values Description n = 0 or 1 DSR/CD Interaction Control *** &SF0 Select DSR to follow CD. &SF1 Select DSR to be independent. n = speed Serial Port Baud Rate Baud Adjust $SB300 Select 300 bps at serial port.
  • Page 89 Command &Wn CommPlete Communications Server Values Description n = 0 or 1 V.32terbo Handshake *** #V0 Enable V.32terbo tones in answer mode. Disable V.32terbo tones in answer mode. In dialing Wait for New Dial Tone command Causes modem to wait for new dial tone. (X2 or X4 must be selected.) n = 0 or 1 Store Configuration...
  • Page 90 MT3334HD8 User Guide Command +++AT<CR> <BREAK>AT<CR> %%%AT<CR> * Factory default on International model ** Not available on U.K. model *** Factory default on North American model Values Description At end of dial Return to Command Mode After Dialing command Semi-colon; causes immediate return to command mode after dialing.

  • Page 91: Appendix F Remote Configuration

    Appendix F Remote Configuration Introduction Remote configuration, a feature of Multi-Tech’s MT3334HD8 modems, is a network management tool that allows you to configure modems anywhere in your network from one location. With password-protected remote configuration, you can issue AT commands to a remote Multi-Tech modem for maintenance or troubleshooting as if you were on site.

  • Page 92: Changing The Passwords

    MT3334HD8 User Guide Changing the Passwords 1. Establish a remote configuration link with the remote modem as described above. 2. Type AT#IMULTI-TECH (or AT#I xxxxxx if you have replaced the MULTI-TECH password with xxxxxx ) and press E ERROR if it is wrong.

  • Page 93: Index

    Index CommPlete Communications Server...
  • Page 94 MT3334HD8 User Guide abort timer, 12, 19, 47, 51 Answer command, 12, 40 answer mode, 18, 34, 40 Answer Tone command, 24 Answerback command, 24 answering a call, 40, 51 ASCII code, 68 Asymmetric Bit Rate command, 28 Asynchronous Word Length command, 37...
  • Page 95 16 modifiers, 17 pause time, 18, 48, 51 smart dialing, 16, 23 Dialing Pause command, 18 dimensions of MT3334HD8, 6 disconnecting, 33 after DTR drop, 49 drop time, 29, 30, 49 inactivity timer, 49 Display Line Probe Data command, 42...
  • Page 96 MT3334HD8 User Guide busy-in time, 50 busy-out time, 50 control of, 29 disconnect drop time, 49 Echo Canceler Frequency Offset Compensation command, Echo Command Mode Characters command, 22 ENQ/ACK Pacing command, 38 error correction at 300 bps, 32 automatic, 31...
  • Page 97 On-Hook/Off-Hook command, 16 online connection commands, 24 online mode, 12, 40, 46, 54, 56 originate mode, 18, 34, 54 originating a call, 31, 34 out-of-band escape sequence, 39 out-of-service state (OOS), 2 out-of-service time, 26, 51 pacing, 36, 37, 38 enable/disable, 38 ENQ/ACK, 38 Pacing command, 38...
  • Page 98 MT3334HD8 User Guide S48, 50 S94, 26, 51 start bit, 37 stop bit, 37 Store Configuration command, 20, 21, 22, 52 Store Phone Number command, 19, 20 storing a configuration, 20, 51 technical specifications, 4 technical support, 61, 63 terminal mode, 56...
  • Page 100 P/N 82063701...

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