MT5634HD8/16 User Guide
MT5634HD8/16 User Guide P/N 82074700, Revision A 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 Manual Organization......................................................................................................................................... 2 LED Indicators............................................................................................................................................
Appendix A ASCII Conversion Chart ........................................... 42 Appendix B Dial Pulses and Tones............................................... 43 Appendix C Result Code Summary .............................................. 45 Appendix D S-Register Summary................................................... 47 Appendix E AT Command Summary ........................................... 49 Glossary .................................................................................................
1 CommPlete Communications Server Introduction 1
MT5634HD8/16 User Guide Introduction The Multi-Tech MT5634HD8 and MT5634HD16 are high speed, high density modem cards for the CommPlete Communications Server. Each MT5634HD8 contains eight integrated 56Kflex modems, and each MT5634HD16 card contains sixteen integrated 56Kflex modems. Each modem on the card can be configured independently of the others via RASexpress Software or the CommPlete Communications Server’s MR9600 controller.
1 Introduction Appendix A ASCII Conversion Chart Appendix B Dial Pulses and Tones Appendix C Result Code Summary Appendix D S-Register Summary Appendix E AT Command Summary Appendix F Remote Configuration Glossary Index LED Indicators The MT5634HD8 has 16 LED indicators (the MT5634HD16 has 32 LEDs) on the front panel, two for each modem: CD Carrier Detect. The CD LED lights when the modem detects a valid carrier signal. OH Off Hook/Out of Service.
MT5634HD8/16 User Guide Technical Specifications Model Numbers MT5634HD8 and MT5634HD16 Data Rates (Modem) Eight or sixteen independent modems (Modem A, B, C, D, E, F, G, H), each operating as follows: Downloads at speeds to 56K bps when calling a fully digital K56flex server (actual connect speed depends on line conditions).
1 Introduction ITU-T V.32bis/V.32 Carrier Frequencies: V.22bis/V.22 or Bell 212A Standard (2400 & 1200 bps) Transmit originate: Transmit answer: Receive originate: Receive answer: Carrier Frequencies: Transmit originate: Bell 103/113 Receive originate: (300 bps) Transmit answer: Receive answer: Carrier Frequencies: Transmit originate: V.21 Receive originate: Transmit answer: Receive answer: Carrier Frequencies: Transmit originate: V.
MT5634HD8/16 User Guide Firmware Upgrades Flash memory; available on Multi-Tech’s BBS and website Indicators LEDs for Carrier Detect and Off Hook/Out-Of-Service Environmental Temperature range: 0°–50° C (32°–120° F) Humidity range: 20–90% (noncondensing) Power Requirements: MT5634HD8 5 VDC at 1.5 A (MT5634HD8) MT5634HD16 5 VDC at 3.0 A (MT5634HD16) Dimensions 23.3 × 2.3 × 29.2 cm (9.2 × 0.9 × 11.5 in.) H × W × D Weight: MT5634HD8 14 oz. MT5634HD16 1 lb.
2 CommPlete Communications Server Installation 7
MT5634HD8/16 User Guide Introduction This chapter describes how to install the MT5634HD8/16 modem card into a CommPlete Communication Server CC9600 chassis. This equipment should be installed only by a qualified service person. The MT5634HD8/16 assembly consists of a high-density modem card and a front panel. Figure 1 shows the layout of the MT5634HD16 card (the MT5634HD8 card is not shown).
2 Installation Pre-Installation Notes Warning: Direct interconnection (or connection by way of other apparatus) of ports marked “SAFETY WARNING see instructions for use” with any other ports (whether or not similarly marked) may produce hazardous conditions on the network. MultiTech strongly urges you to consult a qualified engineer before attempting to make this type of connection. • All installation must be done by a qualified service person.
MT5634HD8/16 User Guide 7. Tighten the MT5634HD8/16’s retaining screws. 8. Repeat steps 1 through 7 for each of the MT5634HD8/16’s you are installing. Three MT5634HD8’s must be installed for each T1 segment, three MT5634HD16’s must be installed for each Dual T1 segment, and one MT5634HD16 and one MT5634HD8 must be installed for each PRI segment. 9. Turn on power to the RASCard segment. 10. Check the LED indicators on the RASCard and the controllers.
3 CommPlete Communications Server AT Commands 11
MT5634HD8/16 User Guide Working with AT Commands The MT5634HD8/16’s modems are controlled by instructions called AT commands, so called because the attention characters AT precede each command or sequence of commands (known as a command string). 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. The 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 40 characters. Note: Each character in a command counts towards the 40 character command line maximum. While Q1 is a single command, it counts as two characters in the command line.
MT5634HD8/16 User Guide Table 1.
3 AT Commands Topic Immediate Action Command A/ I &B &V Description Repeat last command Information request V.
MT5634HD8/16 User Guide Hn On-Hook/Off-Hook n = 0 or 1 Default: 0 Use the H command to make the modem hang up (go on-hook) or simulate the action of picking up a telephone handset (go off-hook). H0 (or H) hangs up the modem H1 brings the line off-hook, just as if you had picked up the telephone handset. It is not necessary to use the H1 command to bring the line off-hook when using the D command. The modem automatically goes off-hook when you press ENTER at the end of the dial command.
3 AT Commands Examples: To pulse-dial the number 555-1212, type ATDP5551212 and press ENTER. To tone-dial the same number, type ATDT5551212 and press ENTER. To call out of a PBX (switchboard) system where a 9 has to be pulse-dialed, and the rest of the number has to be tone-dialed after pausing for a second dial tone, type ATDP9,T5551212 and press ENTER. (The comma causes a pause.
MT5634HD8/16 User Guide $ Detect Call Card Tone Use the $ command to dial services that require you to enter your call card number after a tone. The $ character in the dialing string causes the modem to pause and wait for an AT&T call card “bong” or a 1600 Hz tone. When the modem detects the tone, it processes the rest of the dialing string. If it does not detect the tone within the time set in register S7, the modem stops processing the dial string with a NO CARRIER message.
3 AT Commands Configuration Storage and Recall Commands The MT5634HD8/16 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 cannot change the default parameters in ROM, but you can change parameters in temporary memory and then store them in NVRAM as custom settings. You can then recall the custom settings as if they were factory default settings.
MT5634HD8/16 User Guide connection is made with error correction or compression enabled. These responses are called result codes, and they can be terse (numbers) or verbose (text). 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.
3 Xn AT Commands Result Codes and Call Progress Selection n = 0, 1, 2, 3, 4, 5, 6, or 7 Default: X4 The X command selects which result codes the modem provides in command mode and whether the modem uses “smart dialing” or “blind dialing”. When it smart dials, the modem listens for dial tones and busy signals and responds to them. When it blind dials, the modem ignores the signals and relies on timing instead. X0 causes the modem to blind dial.
MT5634HD8/16 User Guide &Qn Asynchronous Communications Mode n = 0, 5, or 6 Default: &Q5 The &Qn command allows you to select the type of asynchronous communications mode for your modem. Note: These commands are the same as several of the \Nn commands, described later in this chapter. &Q0 selects asynchronous mode with data buffering. This is the same as \N0, non-error correction mode with data buffering. &Q5 selects error control with data buffering. This is the same as \N3, V.42/MNP auto-reliable mode.
3 Cn AT Commands Carrier Control n=1 Default: C1 The Cn command provides backward compatibility with some data communications software. C1 enables normal transmit carrier switching. -Cn Data Calling Tone n = 0 or 1 Default: -C0 The data calling tone is a tone of a certain frequency and cadence, as specified in the V.25 standards, which identifies whether it is remote data, fax, or voice. The frequency is 1300 Hz, with a cadence of .5 s on and 2 s off. -C0 disables the V.25 data calling tone.
MT5634HD8/16 User Guide Nn Modulation Handshake n = 0 or 1 Default: N1 This command controls whether or not the local modem performs a negotiated handshake with the remote modem at connection time, when the communication speed of the two modems is different. N0 enables handshaking only at the communication standard specified by S37 and the ATB command.
3 AT Commands The Data Terminal Ready (DTR) signal on pin 20 of the RS-232/V.24 interface must be high, or “on,” in order for the modem to operate. A high DTR signal tells the modem that the computer it is connected to is ready to communicate through the modem. The DTR signal can also be used to cause the modem to reset to its default parameters, as if you had given the modem an ATZ command. &D0 (or &D) causes the modem to ignore the DTR signal and treat it as always on.
MT5634HD8/16 User Guide 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. \Nn Error Correction Modes n = 0, 1, 2, 3, 4, 5, or 7 Default: \N3 Select the modem’s error correction mode using the \N command. \N0 disables the modem’s V.
3 AT Commands Immediate Action Commands Use these commands to get information about AT commands and the current settings of the modem. A/ Repeat Last Command Default: None Type A/ to repeat the previous command. Do not precede this command with AT or press ENTER to execute it. In Information Request n = 0, 1, 2, 3, 4, or 9 Default: none This command displays specific product information about your modem. I0 or I returns the default speed and controller firmware version number.
MT5634HD8/16 User Guide The &M command enables asynchronous communications mode. This is the default. &Kn Local Flow Control Selection n = 0, 3, or 4 Default: &K3 The &K command allows you disable flow control, and enable hardware or software flow control. &K0 completely disables data flow control initiated by the modem. (This is the same as \Q0.) &K3 enables the modem’s use of the Clear to Send (CTS) signal on the RS-232/V.24 interface to regulate data flow.
3 AT Commands When XON/XOFF pacing is active, the local modem has two options regarding the XON and XOFF characters. It can respond to and discard the characters from the computer, or it can respond to the characters and pass them through the data communications link to the remote modem, thereby pacing the remote modem as well. &X0 causes the modem to respond to and discard the XON and XOFF characters. This is the default.
MT5634HD8/16 User Guide +++AT In-Band Escape Sequence If the modem is online with a remote modem, you can cause the modem to enter command mode without disconnecting the call by typing an escape code. The default escape code used by the modem is three plus signs (+++) followed by the letters AT, up to 10 command characters (most typically H, to hang up), and ENTER. The modem then escapes to command mode, executes the command (if any), and remains in command mode.
3 AT Commands Diagnostic Commands Diagnostic commands help you troubleshoot your modem when problems occur. &Tn Self-Test Commands n = 0, 1, 3, or 6 Default: none The &T command causes the modem to perform various self-tests. &T0 causes the modem to stop any test currently in progress. &T1 causes the modem to perform a local analog loop test, which verifies modem operation and the connection between the modem and the computer.
MT5634HD8/16 User Guide Mn Monitor Speaker Mode n = 0, 1, 2, or 3 Default: M1 The M command allows you to control the modem speaker mode. M0 completely disables the speaker. M1 causes the speaker to be on only until a carrier signal is detected. This is the default. It allows you to hear the initial dial tones and handshake “squawking” when dialing out, for example, which lets you know activity is taking place and when a carrier signal has been detected (the “squawking” stops).
4 CommPlete Communications Server S-Registers 33
MT5634HD8/16 User Guide Introduction This chapter describes the MT5634HD8/16’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 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.
MT5634HD8/16 User Guide S8 determines the length of the pause caused by a comma character 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 65 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 S35 Data Calling Tone Unit: decimal Range: 0–1 Default: 0 (disabled) S35 enables or disables the V.25 data calling tone, which allows remote data, fax and voice discrimination. Setting S35 to zero (0) disables V.25 data calling tone; setting S35 to 1 enables data calling tone. The default setting is 1. S37 Maximum Dial Line Rate Unit: decimal Range: 0–19 Default: 0 S37 sets the maximum dial line rate. When set to zero (0), the maximum dial line rate is the same as the maximum modem speed.
MT5634HD8/16 User Guide S89 Off-line Time Unit: 1 second Range: 0, 5-255 Default: 10 S89 sets the length of time, in seconds, a modem waits in the off-line command mode before it goes into standby mode. If S89 is set to 20 seconds, the modem waits 20 seconds in off-line command mode before going into standby mode. Setting S89 to zero (0) prevents the modem from ever entering standby mode.
4 S-Registers Examples of Reading Values 1. To verify that you entered the value correctly in the preceding examples, type ATS8? and press ENTER in the first example, ATS0? in the second example, and ATS2? in the third example. You should receive the responses 005, 004, and 075, respectively. 2. When configuring S-registers, it is a good practice to include the verification read command in the same command string as the configuration assignment command.
MT5634HD8/16 User Guide 40 CommPlete Communications Server
Appendices CommPlete Communications Server 41
MT5634HD8/16 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 [ \ ] ^ _ 42 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.
MT5634HD8/16 User Guide Figure 3. 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 4.
C Result Code Summary Appendix C Result Code Summary Multi-Tech Result Codes Terse Verbose Definition 0 OK 1 2 3 4 5 6 7 8 10 11 12 13 14 24 25 86 40 55 56 57 58 59 60 CONNECT RING NO CARRIER ERROR CONNECT 1200 NO DIALTONE BUSY NO ANSWER CONNECT 2400 CONNECT 4800 CONNECT 9600 CONNECT 14400 CONNECT 19200 CONNECT 7200 CONNECT 12000 CONNECT 16800 CONNECT 300 CONNECT 21600 CONNECT 24000 CONNECT 26400 CONNECT 28800 CONNECT 31200 CONNECT 33600 CONNECT 45000 CONNECT 56000 DELAYED BLACKLISTED BLACKLIST FULL
MT5634HD8/16 User Guide Extended Result Codes.
D S-Register Summary Appendix D S-Register Summary Register Unit Range Default Description S0 1 ring 0, 1–255 0 S1 S2 1 ring decimal 0–255 0–255 0 43 (+) S3 S4 S5 decimal decimal decimal 0–127 0–127 0–127 13 (^M) 10 (^J) 8 (^H) S6 1 sec S7 1 sec S8 1 sec S10 100 ms 2–65 4–255† 4–7‡ 1–255 1–45* 1–55‡ 0–65 4–255† 4–7‡ 1–254 2 4† 4‡ 50 45* 55‡ 2 4† 4‡ 20 Sets the number of rings before the modem answers. ATS0=0 disables auto answer completely. Counts the rings that have occurred.
MT5634HD8/16 User Guide Register Unit Range Default Description S42 decimal 0–1 10 S43 decimal 0–1 1 S89 1 sec 0, 5-255 10 For testing and debugging only. Enables / disables V.32bis and V.22bis auto rate. Retrain and fallback are disabled in data mode. 0 = disable; 1 = enable.. For testing and debugging only. Enables / disables V.32bis start-up auto mode operation. 0 = disable, 1 = enable. Sets the length of time in the off-line command mode before the modem goes into standby mode.
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/ and the escape sequence. RETURN or ENTER 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 Repeat the last command string. Do not precede this command with AT. Do not press RETURN (or ENTER) to execute.
MT5634HD8/16 User Guide 50 Command Values Description Ds s = phone # Dial Dial telephone number s, where s may include up to 40 alpha-numeric characters, and the L, P, T, V, W, comma (,), colon (:), semicolon (;), !, $, @ and ^ dial string modifiers. &Dn n = 0, 1, 2, or 3 DSn n = 0, 1, 2, or 3 En n = 0 or 1 +ES=6 n/a Fn n=1 Echo Online Data Characters *** F1 Disable online data character echo (included for backward compatibility with some software.
E AT Command Summary Command Values Hn n = 0 or 1 In n = 0, 1, 2, 3, 4, or 9 &Jn n=0 Auxiliary Relay Control *** &J0 The auxiliary relay is never closed. \Jn n=0 Data Buffer Control *** \J0 Enable data buffer — serial port speed is independent of connect speed &Kn n = 0, 3, or 4 Local Flow Control Selection &K0 Flow control disabled. *** &K3 Enable CTS/RTS hardware flow control. &K4 Enable XON/XOFF software flow control.
MT5634HD8/16 User Guide 52 Command Values Description &Mn n=0 Communications Mode *** &M0 Asynchronous mode. Nn n = 0 or 1 Modulation Handshake N0 Modem performs handshake only at communication standard specified by S37 and the B command. *** N1 Modem begins handshake at communication standard specified by S37 and the B command, but can fallback to a lower speed during handshake. \Nn n = 0, 1, 2, 3, 4, 5, or 7 Error Correction Mode Selection.
E AT Command Summary Command Values Description Sr=n r = 0–8, 10-11, 28, 35, 37, 42-43, or 89; n varies Set Register Value Set value of S-register r to value of n, where n is entered in decimal format. Sr? r = 0–8 10-11, 28, 35, 37, 42-43, or 89 Read Register Value Read value of S-register r and display value in 3-digit decimal form. &Sn n = 0 or 1 Data Set Ready Control *** &S0 Force DSR high (on). &S1 Let DSR follow CD.
MT5634HD8/16 User Guide 54 Command Values Description defaults. Result Codes and Call Progress Selection X0 Basic result codes (CONNECT only); does not look for dial tone or busy. X1 Extended result codes (w/ CONNECT 1200, CONNECT 2400, etc.); does not look for dial tone or busy signal. X2 Extended result codes with NO DIAL TONE; does not look for busy signal. X3 Extended result codes with BUSY; does not look for dial tone. *** X4 Extended result codes with NO DIAL TONE and BUSY.
E AT Command Summary Command Values @ In dial command ^ In dial command +++AT Description the rest of the dial string. Quiet Answer Causes modem to wait for a ringback, then 5 seconds of silence before processing next part of command. Disable Data Calling Tone Transmission The modem does not transmit data calling tones. Escape Sequence Puts modem in command mode while still remaining on line. Type +++ followed by the letters A and T, up to ten command characters and a RETURN.
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Glossary CommPlete Communications Server 57
MT5634HD8/16 User Guide A AC (Alternating Current): A power source whose signal crosses a reference voltage (usually called ground or zero). Alternating between a maximum and minimum voltage, AC may also be referred to as a bi-polar signal. Contrast with DC. ACK (ACKnowledgment code – pronounced “ack”): A communications code sent from a receiving modem to a transmitting modem to indicate that it is ready to accept data. It is also used to acknowledge the error-free receipt of transmitted data.
Glossary AUTOEXEC.BAT (AUTOmatic EXECute BATch): A DOS batch file that executes when the computer is started. This file contains the basic start-up commands that help configure the system. Automatic Dialer: A device which is programmed to place a call to a predetermined number any time it is taken “offhook”. B Background: An activity that takes place in the PC while you are running another application. In other words, the active user interface does not correspond to the ‘background’ task.
MT5634HD8/16 User Guide Bus: A common channel between hardware devices either internally between components in a computer, or externally, between stations in a communications network. Byte: The unit of information a computer can handle at one time. The most common understanding is that a byte consist of 8 binary digits (bits), because that’s what computers (PCs) can handle. A byte holds the equivalent of a single character, such as the letter “A”.
Glossary on the data bits in the packet. A CRC is used for error detection by many synchronous protocols. CTS (Clear To Send signal): With communications between modems, an RSs-232 signal sent from the modem to the DTE that indicates it is ready to accept data. Contract with RTS. D DAA (Data Access Arrangement): The circuitry to isolate any device from phone lines and their associated equipment. Daisy-chain: A method of connecting multiple devices in a series, one after another.
MT5634HD8/16 User Guide E EBCDIC (Extended Binary Coded Decimal Interchange Code - pronounced “eb suh dick”): An IBM character code used in its mainframe and midrange computers. It is an 8-bit code (256 combinations) that stores one alphanumeric character or two decimal digits within a byte. EBCDIC and ASCII codes are the most common codes used to represent data. Echo: The reflection or duplication of a signal back toward its source.
Glossary 1. The way text is set up on a page. 2. To prepare a disk for holding information. Formatting a disk can delete all information that was previously on it. 3. The information is structured in a file, often specific to one application or protocol. Frequency: A characteristic of an electrical or electronic signal which describes the periodic recurrence of cycles. Frequency is inversely proportional to the wavelength or pulse width of the signal.
MT5634HD8/16 User Guide Kernel: The core of an operating system which interacts directly with the system hardware. While most operating systems are based on the concept of a kernel, the term is best recognized as a fundamental of the UNIX operating system. Kernels have been expanded to include commonly-used utilities, but with the advent of the “micro kernel”, the original modular design of UNIX is being revived. Kilobit: One thousand bits. A unit of measure for digital data rates.
Glossary Multiplexer (mux): A device that merges several signals into one composite signal for transmission over a single medium or channel. A de-multiplexer (usually built into a mux) reverses the process at the receiving end. N NAK (Negative Acknowledgment): Communications code used to indicate that a message was not properly received, or that a terminal does not wish to transmit. Contrast with ACK.
MT5634HD8/16 User Guide Pulse dialing: One of two methods of dialing a telephone, usually associated with rotary dial phones. Compare with tone dialing. RJ-11: An industry standard interface used for connecting a telephone to a modular wall outlet; comes in 4-and 6-wire packages. Pulse-width: Pertaining to a digital signal. Pulse width refers to the duration of one state between clocking signals. Pulse width roughly corresponds to an analog signal’s wavelength.
Glossary transmitting data faster than normal, because the acknowledgments are actually sent by the modem instead of the remote UNIX computer. Tone dialing: One of two methods of dialing a telephone, usually associated with push button phones. Compare with pulse dialing. Spooling (Simultaneous Peripheral Operations On-line): Overlapping a low-speed operation with normal processing, such as printing a file or document in the background while creating a new document in the foreground.
MT5634HD8/16 User Guide V.27: The CCITT modulation standard for 4800 bps, full or half-duplex transmission. Primarily for synchronous use. Not common in North America. V.27ter is used by Group 2 fax-modems for 4800 bps fax transmission. WATS (Wide Area Telephone Service): A discounted longdistance calling plan that allows calls in or out. The popular 800 numbers are WATS lines in. The calls are charges to the holder of the 800 number at a discounted rate. V.
Glossary CommPlete Communications Server 69
MT5634HD8/16 User Guide 70 CommPlete Communications Server
Index CommPlete Communications Server 71
MT5634HD8/16 User Guide A abort timer, 12, 18 Answer command, 12, 30 answer mode, 30 Answer Tone command, 22 answering a call, 30, 38 ASCII code, 50 asynchronous communications mode, 22 Asynchronous Communications Mode command command, 22 AT commands ! (exclamation mark), 17 %B, 22 %C, 26 &B, 27 &C, 24 &D, 25 &F, 19, 39 &G, 23 &J, 29 &K, 28 &M, 27 &P, 51 &Q, 22 &S, 25 &T, 31 &V, 27 &W, 19, 38, 39 &Y, 19 &Zn=s, 18 +++AT, 30 +ES=6, 30 , (comma), 17, 36 ; (semicolon), 17 @, 18 ^, 18 A, 12, 30 A/, 26 AT, 1
Index D DAA, 2 Data Buffer Control command, 29 data calling tone, 36 Data Calling Tone command, 23 Data Compression command, 26 Data Set Ready Control command, 25 Data Terminal Ready Control command, 25 diagnostic commands, 31 Dial a Stored Number command, 18 Dial command, 12, 15 dial tone, 15 wait time, 21, 35 dialing a phone number, 15 a stored number, 18 blind dialing, 15, 21 modifiers, 16 pause time, 17, 36, 38 smart dialing, 15, 21 Dialing Pause command, 17 dimensions of MT5634HD16, 6 Disable Data Cal
MT5634HD8/16 User Guide N NVRAM (nonvolatile random access memory), 13, 18, 19, 39 O off-line time, 38 On-Hook/Off-Hook command, 16 online connection commands, 22 online mode, 12, 30, 34 out-of-service state (OOS), 3 P pacing, 27, 29 parameters, 13, 19 default, 13, 25 PBX phone systems, 16, 17 power, 3, 6 pulse ratios, setting, 51 Pulse-Dial command, 16 Q Quiet Answer command, 18 R redial last number, 16 reliable mode, 25, 26 Repeat Last Command command, 26 Reset Modem command, 19 result codes, 13, 20,
Index View Numbers in Blacklist command, 22 W Wait for New Dial Tone command, 17 wait timer, 35, 38 wait-for-carrier mode, 12 CommPlete Communications Server warnings, 8 World Wide Web, 46 X XON/XOFF, 29 XON/XOFF Pass-Through command, 29 75
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P/N 82074700
