MT3334HD8 Modem User Guide
MT3334HD8 User Guide P/N 82063701, Revision B Copyright © 1997 by Multi-Tech Systems, Inc. All rights reserved. This publication may not be reproduced, in whole or in part, without prior expressed written permission from Multi-Tech Systems, Inc. Multi-Tech Systems, Inc. makes no representation or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Furthermore, Multi-Tech Systems, Inc.
Federal Communications Commission Statement This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
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
Table of Contents 1 Introduction Introduction ...................................................................................................................................................... 2 LED Indicators................................................................................................................................................... 2 Power Supply.........................................................................................................................................
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.
1 CommPlete Communications Server Introduction 1
MT3334HD8 User Guide Introduction The Multi-Tech MT3334HD8 is a high speed, high density modem card for the CommPlete Communications Server. Each MT3334HD8 card contains eight integrated 33,600 bps modems. Each modem on the MT3334HD8 card can be configured independently of the others via the CommPlete 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.
1 Introduction Chapter 2 Installation This chapter describes how to install the MT3334HD8 into the CC9600 chassis. Chapter 3 Command Mode Operation 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.
MT3334HD8 User Guide Technical Specifications Model Number MT3334HD8 Data Rates (Modem) Eight independent modems (Modem A, B, C, D, E, F, G, H), each operating at 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200, 16,800, 14,400, 12,000, 9600, 4800, 2400, 1200, or 0-300 bps Data Rates (Fax) 14,400, 9600, 4800, and 2400 bps Data Format (Modem) Serial, binary, asynchronous at all data rates Configuration Each of the card’s modems is independently configurable Compatibility (Modem) ITU-T V.
1 Introduction (2400 & 1200 bps) Receive answer: Carrier Frequencies: Transmit originate: Bell 103/113 (300 bps) Receive originate: Transmit answer: Receive answer: Carrier Frequencies: Transmit originate: V.21 Receive originate: Transmit answer: Receive answer: Carrier Frequencies: Transmit originate: V.
MT3334HD8 User Guide Power Requirements 5 VDC at 0.95 A ±16 VDC at 0.1 A Power Consumption Approximately 6 watts 6 Dimensions 23.3 × 2.3 × 29.2 cm (9.2 × 0.9 × 11.5 in.) H × W × D Weight 1.1Kg (2.5 lb.
2 CommPlete Communications Server Installation 7
MT3334HD8 User Guide Introduction This chapter describes how to install the MT3334HD8 modem card into a CommPlete Communication 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. There are no external connectors.
2 Installation Pre-Installation Notes Warning: Interconnection directly, or by way of other apparatus, of ports marked “SAFETY WARNING see instructions for use” with ports marked or not so marked may produce hazardous conditions on the network. Advice should be obtained from a competent engineer before such a connection is made. • All installation must be done by a qualified service person. • To reduce emissions, be sure to use blanking plates to cover empty slots in the CC9600 chassis.
3 CommPlete Communications Server AT Commands 11
MT3334HD8 User Guide Working with AT Commands The MT3334HD8’s modems are controlled by instructions called AT commands, so called because the attention characters AT precede each command or command string (sequence of commands). You can send commands to the modem from your keyboard while in terminal mode, or you can use communications software to issue these commands automatically. A MT3334HD8 modem is in command mode when it is not dialing or online.
3 AT Commands A parameter after a command (0, 1, 2, etc.) tells the modem which option to use. If you do not specify a parameter, the modem assumes the 0 (zero) option. E, for example, is the same as E0. You can issue several commands on a single line (a command string) as long as the line does not exceed 60 characters. Note that though Q1 is one command, it counts as two characters in the command line. Each command has a valid range of parameters; for instance, &W can have only 0 or 1 as a parameter.
MT3334HD8 User Guide Table 1. AT Commands by Function 14 Topic Dialing Action Command D A: H Dial Modifiers P T W R , : ; ! @ $ Phone Number Memory D...N N N...
3 AT Commands Error Correction & Data Compression &E0 &E1 &E2 &E14 &E15 #L $E $A $F $R Non-error correction mode Auto-reliable mode Reliable mode Data compression disabled Data compression enabled V.42 error correction modes V.
MT3334HD8 User Guide Dialing Commands Dialing commands are used to dial and to hang up. Ds Dial s = phone number Default: none The letter D in a command causes the modem to dial the telephone number immediately following it. For example, if you type ATD5551212, 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.
3 AT Commands pauses in the dial sequence, automatic redials if a number is busy, and reverting to command mode or switching to answer mode after dialing. P, T 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.
MT3334HD8 User Guide Rn 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. R (with no number) at the end of the dialing string reverses in originate mode. R0 disables mode reversing. R1 enables mode reversing when R is added to the dial string.
3 @ AT 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. For example, ATDT5551212@6313550 causes the modem to dial the first number (555-1212), then wait for the time specified in register S7 for at least one ringback and five seconds of silence.
MT3334HD8 User Guide You can automatically dial a telephone number that is stored in the modem’s number memory by typing ATNn, where n = 0 or 1. For example, you can dial a number stored at N0 by typing ATN0 in terminal mode and pressing ENTER. Warning: Do not include the letter D in this command, or the stored number will be erased. NdNe Number Linking d = 0 or 1 e = 1 or 0 Default: none Number linking allows the modem to dial a second stored number if the first stored number is busy.
3 &Fn AT Commands Load Default Configuration n = 0, 8, or 9 Default: &F8 MT3334HD8 modems store factory default AT command settings and S-register values in read-only memory (ROM); they store your custom AT command and S-register values in nonvolatile random access memory (NVRAM). The &F0 (or &F) command resets the modem to the factory default values stored in ROM or to your custom values stored in NVRAM, depending on whether you last stored an &F8 or an &F9 command.
MT3334HD8 User Guide En 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. E0 disables the echo. E1 enables the echo. Qn Result Codes Enable/Disable n = 0, 1, or 2 Default: Q0 You can use the Q command to enable or disable result codes for applications such as computer-controlled auto dialing.
3 &Qn AT Commands Result Codes (Multi-Tech or Standard AT) n = 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. &Q0 selects Multi-Tech responses with RELIABLE, LAPM, and COMPRESSED modifiers. With &Q0, the verbose result code for 14,400 bps is CONNECT 14400 LAPM COMPRESSED.
MT3334HD8 User Guide &An Answerback n = 0 or 1 Default: &A0 The &A command controls the MT3334HD8’s answerback feature. Answerbacks are used in some online realty applications and elsewhere as a security measure. The &A command enables a modem to return a message to an identification request from another computer. The default identification is MESSAGE NOT PROGRAMMED. &A0 disables the answerback feature. &A1 enables the modem to return a message to an inquiry.
3 AT Commands %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. %DC0 enables command mode. %DC1 disables command mode.
MT3334HD8 User Guide #Fn Fallback Modes n = 0, 1, or 2 Default: #F2 The #F command controls whether the modem will fall back to a lower speed because of an unacceptable error rate. If line conditions deteriorate, the modem has the ability to fall back from its original speed to the next lower speed when operating in V.34, V.32bis, or V.32 mode. If the error rate becomes too great, the modem performs a retrain at the next lower speed.
3 AT Commands &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. Normally, it is a sine wave analog tone. However, some PBXs generate square wave rings that can go undetected by normal ring detection circuits, resulting in a failure to make a connection.
MT3334HD8 User Guide Yn 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” may be received when a hang-up command is issued. Y0 disables the modem’s use of the break signal.
3 AT 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.
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.
3 AT 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. &En Error Correction Modes n = 0, 1, or 2 Default: &E1 Select the modem’s error correction mode using the &E0, &E1, or &E2 command. &E0 disables the modem’s V.
MT3334HD8 User Guide $En 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. $An Auto-Reliable Buffering n = 0 or 1 Default: $A0 In auto-reliable mode, the modem has four seconds to establish a reliable connection, after which the modem drops to non-error correction mode.
3 $Rn AT Commands Retransmit Count n = 0 or 1 Default: $R0 If errors are received during a reliable connection, the modem re-sends the block of data that contained an error. If another error occurs, it re-sends the block again. The modem counts the number of times that a data block is re-sent. $R0 causes the modem to disconnect if the same block of data is re-sent 12 times without being received properly, on the assumption that the line is unsuitable for transmission.
MT3334HD8 User Guide $MBn Modem Baud Rate n = speed in bits per second Default: $MB33600 The $MB command sets a modem’s initial transmission speed for originate mode. In V.32 mode (9600 bps), it also sets the transmission speed for answer mode. With speed conversion on, this transmission speed can be different from the serial port speed. When the modem answers a call from another modem, it automatically switches its transmission speed to match the calling modem.
3 $SB300 $SB1200 $SB2400 $SB4800 $SB9600 $SB19200 $SB38400 $SB57600 $SB115200 AT Commands 300 bps 1200 bps 2400 bps 4800 bps 9600 bps 19,200 bps 38,400 bps 57,600 bps 115,200 bps (factory default) Immediate Action Commands Use these commands to get information about AT commands and the current settings of the modem. For additional immediate action commands, see “Line Probe Commands” on page 41. A/ Repeat Last Command Default: None Type A/ to repeat the previous command.
MT3334HD8 User Guide L8 List Online Diagnostics Default: none The L8 command displays the modem’s online status. You can print this display and use it as a modem status report or as diagnostic information (such as when calling Technical Support). If you type +++ATL8 with the modem online, the current online status will be displayed. If you type ATL8 with the modem in command mode, the most recent online status will be displayed.
3 AT Commands $EB0 enables a 10-bit format It automatically detects parity when an AT command is issued. $EB1 enables an 11-bit format. &E3 Flow Control Disable The &E3 command completely disables data flow control initiated by the modem. &E4 Hardware Flow Control Factory default. The &E4 command enables the modem’s use of the Clear to Send (CTS) signal on the RS232/V.24 interface to regulate data flow. When CTS drops, data flow is suspended until the signal goes high again.
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 Pacing (Computer-Initiated Flow Control) n = 12 or 13 Default: &E13 Pacing is the means by which the DTE (data terminal equipment—your computer or terminal) regulates the stream of incoming data.
3 AT Commands Escape Sequences Escape sequences are also known as escape codes. They are used to cause the modem to enter command mode from online mode without disconnecting the call. There are two local escape sequences used by the modem, +++AT and AT, and one remote escape sequence, %%%AT (see “Remote Configuration.”).
MT3334HD8 User Guide O Go Back Online You can use the O command to bring the modem out of command mode and back into online mode. The O command reverses the result of entering the escape code. The O command brings the modem into whichever online mode (originate or answer) that it was in prior to entering command mode. Remote Configuration Commands When you are online with another Multi-Tech modem, you can issue AT commands to it by sending a remote configuration escape sequence.
3 AT Commands #Syyyyyy Change Setup Password yyyyyy = password Default: #SMODEMSETUP Use the #S command to enter or change the remote configuration setup password. Before you can use it, you must enter the login password using the #I command. AT#Syyyyyy enters the current remote configuration password, where yyyyyy represents the password. If the password is wrong, the remote modem responds with ERROR; if it is correct, the remote modem responds with OK, and you can proceed with the next command.
MT3334HD8 User Guide &RP Immediate Line Probe Default: none This immediate action command initiates a retrain that makes the processor read line probe information for display using the L9, L10, and L11 commands. It is valid only when online in V.34 mode. Before issuing the command, you must escape to command mode while remaining online. To combine both actions, use the following command string: +++AT&RP.
3 Un AT Commands Loopback Test Modes n = 0–3 Default: None 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. ATU1 places the modem in answer mode for the local analog loopback test.
MT3334HD8 User Guide 44 CommPlete Communications Server
4 CommPlete Communications Server S-Registers 45
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. Use the Sr? command to read the value stored in an S-register, and the Sr=n command to change it.
4 S-Registers 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 ENTER key on most keyboards. S3 may be set for any ASCII character. Note: If you change the S3 value, you must make corresponding changes in your data communications software. S4 Line Feed Character Unit: Decimal Range: 0–127 Default: 10 (^J) S4 defines the line feed character by its decimal ASCII code.
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. S8 also defines the length of time the modem waits before retrying a call after it detects a busy signal. Some computer systems need more than two seconds to reset, in which case you should increase the value of S8.
4 S-Registers S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD Unit: 50 ms Range: 0–255 Default: 20 (1 second) 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.
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. If S36 is set for a non-zero time, the modem then waits for the time set by S36; if DTR has not gone active again in that time, the modem goes off-hook, causing a busy signal for callers.
4 S-Registers Reading and Assigning S-Register Values Use the S command to assign a value to an S-register and to read an S-register’s current value. To read an S-register value, in terminal mode, type S, the S-register number, and a question mark (?), and press ENTER. For example, to display the value of register S7, type ATS7? and press ENTER. The answer will appear as a three-digit decimal number (e.g., 045).
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. See Chapter 3.
5 Testing the MT3334HD8 CommPlete Communications Server 53
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. In a loopback test, data from your computer loops through the circuits of your modem and/or a remote modem before it appears on your monitor.
5 Testing the MT3334HD8 3. Note that the CD LED is on. If you’re set for 14,400 bps or higher, the Speed LED should be on. If the CD LED is not on, there is a defect in your modem. 4. Enter characters from your keyboard. For this test, typing multiple uppercase U characters is a good way to send an alternating test pattern of binary ones and zeros. The characters entered should be displayed on your monitor. The TD and RD LEDs should flash when a character is entered. 5.
MT3334HD8 User Guide 56 2. Open your communications software and go into terminal mode. Type AT and press ENTER; you should get an OK message. Type AT&E0 to disable error correction. 3. Dial the remote modem and establish your online connection. 4. Type the escape sequence (+++AT or AT) to bring your modem into command mode while maintaining the connection with the remote modem. 5. Type ATU2 and press ENTER.
5 Testing the MT3334HD8 Local Digital Loopback Test (V.54 Loop 2) This test is identical to the remote digital loopback test with one exception. Instead of using your modem to signal a remote modem to place itself in digital loopback mode, your modem is placed in digital loopback mode while the remote modem is not. Data is entered and transmitted from the remote modem, sent across the phone line to the local modem, and looped back to the remote modem. See Figure 4.
6 CommPlete Communications Server Warranty, Service, and Technical Support 59
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. MTS MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.
6 Warranty, Service, and Technical Support Technical Support Multi-Tech has an excellent staff of technical support personnel available to help you get the most out of your Multi-Tech product. If you have any questions about the operation of this unit, please call (800) 9722439 (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.
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).
6 Warranty, Service, and Technical Support 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 PAGE DOWN key initiates the download.) 8. When the download is complete, enter S to return to the File Menu.
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 Marketing Dept. mtssales@multitech.com Sales Dept. international@multitech.com International Marketing & Sales writers@multitech.com Publications Dept. Multi-Tech's presence includes a Web site at: http://www.multitech.com and an ftp site at: ftp://ftp.multitech.
6 Warranty, Service, and Technical Support Upgrading the MT3334HD8 Firmware The MT3334HD8’s firmware is contained in a flash PROM. At various times, Multi-Tech may add enhancements and/or fixes to this firmware. The flash technology used in the MT3334HD8 allows these upgrades to be loaded directly into the PROM chip through the modem’s serial port, or through the backplane when using the management software.
MT3334HD8 User Guide 66 CommPlete Communications Server
Appendixes CommPlete Communications Server 67
MT3334HD8 User Guide Appendix A ASCII Conversion Chart CTRL CODE @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _ 68 HEX DEC CODE HEX DEC CODE HEX DEC CODE HEX DEC NUL SOH STX ETX EOT ENQ ACK BEL BS HT LF VT FF CR SO SI DLE DC1 DC2 DC3 DC4 NAK SYN ETB CAN EM SUB ESC FS GS RS US 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 SP ! " # $ % & ' ( ) * + , .
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. The number of pulses in a code are the same as the digit they encode; thus, the digit 1 is represented by one pulse, the digit 2 by two pulses, etc. In Figure B-1, the digit 2 is pulse dialed, followed by the digit 1.
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. The actual functions that are provided depend on the PBX manufacturer’s implementation and feature set. Hz Digits 697 1 2 3 A 770 4 5 6 B 852 7 8 9 C 941 * 0 # D Hz 1209 1336 1477 1633 Figure B-3.
C Result Code Summary Appendix C Result Code Summary Multi-Tech Result Codes (&Q0) Terse Verbose Definition 0 OK 1 2 3 4 5 6 7 8 9 10 11 12 13 19 21 23 24 26 28 31 33 CONNECT RING NO CARRIER ERROR CONNECT 1200 NO DIALTONE BUSY NO ANSWER CONNECT 2400 Command was executed without error; ready for next command. Modem has detected carrier and gone online. Modem has detected ring caused by incoming call. No carrier signal has been detected within the allowed time.
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: 1L 5L 9L 10L 12L 13L 19L 21L 24L 26L 28L 31L 33L Connect Connect Connect Connect Connect Connect CONNECT CONNECT CONNECT CONNECT CONNECT CONNECT CONNECT LAPM 1200 LAPM 2400 LAPM 4800 LAPM 9600 LAPM 14400 LAPM 19200 LAPM 21600 LAPM 24000 LAPM 26400 LAPM 28800 LAPM 31200 LAPM 33600 LAPM Data Compression.
D S-Register Summary Appendix D S-Register Summary Register Unit Range Default Description S0 1 ring 0, 1–255 1 S1 S2 S3 S4 S5 S6 1 ring decimal decimal decimal decimal 1 sec S7 1 sec S8 1 sec S9 100 ms 0–255 0–127 0–127 0–127 0–127 2–255 4–255† 4–7‡ 1–255 1–45* 1–55‡ 0–255 4–255† 4–7‡ 1–255 0 43 (+) 13 (^M) 10 (^J) 8 (^H) 2 4† 4‡ 45 45* 55‡ 2 4† 4‡ 6 Sets the number of rings until the modem answers. ATS0=0 disables auto answer completely. Counts the rings that have occurred.
MT3334HD8 User Guide Register Unit S43 decimal S48 decimal S94 1 sec Range Default Description 33, 31, 28, 26, 24, 21, 19, 16, 14, 12, 96, or 48 33, 31, 28, 26, 24, 21, 19, 16, 14, 12, 96, or 48 0–254, 255 0 Sets fixed V.34 connect speed. 28 = 28800 bps; 26 = 26400 bps;. . . 48 = 4800 bps. 0 default disables this feature. 0 Sets maximum V.34 connect speed. 33 = 33600 bps; 31 = 31200 bps;. . . 48 = 4800 bps. 0 default disables feature (same as S48=33).
E AT Command Summary Appendix E AT Command Summary Command Values Description AT n/a Attention Code The attention code precedes all command lines except A/, A: and escape codes. RETURN n/a RETURN Key Press the RETURN (ENTER) key to execute most commands. A n/a Force Answer Mode Answer call immediately without waiting for ring. A/ n/a Repeat Last Command Do not precede this command with AT. Do not press RETURN to execute.
MT3334HD8 User Guide 76 Command Values Description $BAn 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. (Serial port speed is same as modem data rate.) &Cn n = 0, 1, 2, or 4 Carrier Detect Control &C0 Force Carrier Detect on. *** &C1 Let Carrier Detect follow carrier signal. &C2 Let Carrier Detect drop for time set by S24 on disconnect, then go high again.
E AT Command Summary Command Values Description >DTn n = 0 or 1 DTMF Detection *** >DT0 Disable DTMF detection. >DT1 Enable DTMF detection when off-hook. En n = 0 or 1 Echo Command Mode Characters E0 Do not echo command mode characters. *** E1 Do echo command mode characters. &En n = 0–15 V.42 Error Correction Modes &E0 Non-error correction mode (V.42 disabled). *** &E1 Auto-reliable mode. &E2 Reliable mode (V.42 enabled). Modem-Initiated Flow Control &E3 Flow control disabled.
MT3334HD8 User Guide 78 Command Values Description %En 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 +++. &Fn n = 0, 8, or 9 Load Default Configuration &F0 Load factory default values from ROM. *** &F8 Read factory default values and DIP switch settings when &F is issued. &F9 Read parameters stored in nonvolatile memory when &F is issued.
E AT Command Summary Command Values Description In n = 0, 1, 2, or 5 Inquire Product Codes I0 Request modem ID #. I1 Request firmware revision #. I2 Request modem description. I5 Request DSP version. #Ix x = password Enter Login Password Password is case sensitive. #I=x x = password Store Login Password Password must be 6–10 characters long, and may consist of any keyboard characters. Ln n = 0, 5–11 List Commands L List stored telephone numbers. L5 List current operating parameters.
MT3334HD8 User Guide Command Values Description $MBn n = speed Nd d = 0 or 1 Dial a Stored Number Dial stored telephone number d. NdNe... d = 0 or 1 e = 1 or 0 Number Linking Dial stored number d; if that is busy, dial stored number e. The command may be extended NdNeNdNe... to cycle between the two numbers. O n/a Go Back On Line Exit command mode and go into online mode after using the escape code to do the reverse.
E AT Command Summary Command Values &Rn 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. &RAn n = 0 or 1 Asymmetric Bit Rate *** &RA0 Enable asymmetric bit rate operation. &RA1 Disable asymmetric bit rate operation. &RDn n = 0 or 1 Square Wave Ring Detect &RD0 Full wave ring detect only. *** &RD1 Full wave and square wave ring detect.
MT3334HD8 User Guide 82 Command Values Description &SFn n = 0 or 1 DSR/CD Interaction Control *** &SF0 Select DSR to follow CD. &SF1 Select DSR to be independent. $SBn n = speed Baud Adjust ($BA) must be off. Serial Port Baud Rate $SB300 Select 300 bps at serial port. $SB1200 Select 1200 bps at serial port. $SB2400 Select 2400 bps at serial port. $SB4800 Select 4800 bps at serial port. $SB9600 Select 9600 bps at serial port. $SB12000 Select 12,000 bps at serial port.
E AT Command Summary Command Values #Vn n = 0 or 1 W In dialing command Wait for New Dial Tone Causes modem to wait for new dial tone. (X2 or X4 must be selected.) &Wn n = 0 or 1 Store Configuration &W0 Store current settings in NVRAM; modem will load these at power-on or with the ATZ command instead of reading factory ROM defaults. *** &W1 Do not store settings. Xn n = 0–4 Result Codes and Call Progress Selection *** X0 Basic result codes (CONNECT only); does not look for dial tone or busy.
MT3334HD8 User Guide Command Values Description ; At end of dial command Return to Command Mode After Dialing Semi-colon; causes immediate return to command mode after dialing. ! In dial command Flash On-Hook Exclamation; causes modem to flash on-hook. @ In dial command Quiet Answer Causes modem to wait for a ringback, then 5 seconds of silence before processing next part of command.
F Appendix F Remote Configuration 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.
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#Ixxxxxx if you have replaced the MULTI-TECH password with xxxxxx) and press ENTER. The modem responds with OK if the login password is correct, and ERROR if it is wrong. 3. Type AT#SMODEMSETUP (or AT#Syyyyyy if you have replaced the MODEMSETUP password with yyyyyy) and press ENTER.
Index CommPlete Communications Server 87
MT3334HD8 User Guide A 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 AT Command Control command, 12, 25 AT commands attention code, 12, 13 command string limit, 13 disabling command mode, 12, 25 parameters, 13 summary, 75 A, 12, 40 A/, 35 A:, 16 AT, 12, 13 B, 24 D, 12, 16 D...N...
Index %E, 39 %F, 28 >DT, 25 *H, 26, 51 ! (exclamation mark), 18 , (comma), 18, 48 : (colon), 16, 18 ; (semicolon), 18 @, 19 +++AT, 39 AT, 39 auto answer, 12, 33, 46, 51 disabling, 46 Auto Speed Detection command, 24 Auto-Reliable Buffering command, 32 Auto-Reliable Fallback Character command, 32 auto-reliable mode, 31, 32 Auto-Reliable Mode command, 31 B backspace character, 13, 47 Baud Adjust command, 33 baud rate modem, 34 serial port, 33, 34 BBS, Multi-Tech, 62 Bell standards, 24 blind d
MT3334HD8 User Guide busy-in time, 50 busy-out time, 50 control of, 29 disconnect drop time, 49 E Echo Canceler Frequency Offset Compensation command, 28 Echo Command Mode Characters command, 22 ENQ/ACK Pacing command, 38 error correction at 300 bps, 32 automatic, 31 disabling, 31 selecting, 31, 32 Error Correction Modes command, 31 escape code character, 46 Escape Sequence Options command, 39 escape sequences +++AT, 39 AT, 39 options, 39 remote configuration, 40 timeout, 49 Extended codes,
Index O 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 P pacing, 36, 37, 38 enable/disable, 38 ENQ/ACK, 38 Pacing command, 38 parameters, 13, 20, 35 default, 13, 29 parity, 37 PBX phone systems, 17, 49 PBX/CBX disconnect drop time, 30, 49 power, 2, 6 PS9600 power supplies, 9 pulse ratios, setting, 69 Pulse-Dial command,
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 T technical specifications, 4 technical support, 61, 63 terminal mode, 56 testing, 42, 55, 56, 57 commands, 42 loopback tests, 42, 43, 54, 56 tone detection, 25 tone dialing, 69 Tone-Dial command, 17 tone-dialing, 48 transmission speed, 33, 34 Trellis-Coded Modulation command, 27 U upgrading the firmware, 64 92 V V.21, 24 V.
P/N 82063701
