Multitech MT5634HD16 User manual

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. 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.
Revision Date Description
A 11/15/97 Manual released.
Multi-Tech, CommPlete, RASExpress, MultiExpress, MultiExpress Fax MultiModem, MultiModemZDX,
MultiCommManager, and the Multi-Tech logo are trademarks of Multi-Tech Systems, Inc. Other
trademarks and trade names mentioned in this publication belong to their respective owners.
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
[phone] or [phone]
U.S. Fax [phone]
Technical Support [phone]
BBS [phone] or [phone]
Fax Back [phone]
Internet Address: http://www.multitech.com

CommPlete Communications Server iii
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. This equipment generates,
uses, and can radiate radio frequency energy, and if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference, in which case the user will be
required to correct the interference at his own expense.
Warning: Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
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.
2. When trouble is experienced, you must disconnect your modem from the telephone company’s jack
to determine the cause of the trouble, and reconnect your modem only when the trouble is
corrected.
3. The modem cannot be connected to pay telephones or party lines.
4. If requested by the telephone company, you must notify them of the following before the
MT5634HD8/16 is installed:
a. The particular phone line (phone number) to which the connection is to be made.
b. The FCC Registration Number. (See your CC9600 Chassis User Guide for specifics.)
c. The manufacturer’s name and model number:
Multi-Tech Systems - Model MT5634HD8 or MT5634HD16
5. If the telephone company notifies you that your device is causing harm, unplug it. The telephone
company may disconnect your service if necessary and also may change its facilities, equipment,
operations or procedures which may affect operation of your equipment. Where practical, the
telephone company must promptly inform you in writing of the temporary disconnect or change in
service, give you the opportunity to make changes allowing uninterrupted service, and inform you of
your rights to bring a complaint to the FCC.

iv CommPlete Communications Server
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.
See your fax software manual for setup details.
Canadian Limitations Notice
Notice: The ringer equivalence number (REN) assigned to each terminal device provides an indication of
the maximum number of terminals allowed to be connected to a telephone interface. The termination of a
interface may consist of any combination of devices subject only to the requirement that the sum of the
ringer equivalence numbers of all the devices does not exceed 5.
Notice: The Industry Canada label identifies certificated equipment. This certification means that the
equipment meets certain telecommunications network protective, operational and safety requirements.
Industry Canada does not guarantee the equipment will operate to the user’s satisfaction.
Before installing this equipment, users should ensure that it is permissible to be connected to the facilities
of the local telecommunications company. The equipment must also be installed using an acceptable
method of connection. The customer should be aware that compliance with the above conditions may not
prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated
by the supplier. Any repairs or alterations made by the user to this equipment, or equipment
malfunctions, may give the telecommunications company cause to request the user to disconnect the
equipment.
Users should ensure for their own protection that the electrical ground connections of the power utility,
telephone lines and internal metallic water pipe system, if present, are connected together. This precaution
may be particularly important in rural areas.
Caution: Users should not attempt to make such connections themselves, but should contact the
appropriate electric inspection authority, or electrician, as appropriate.
See your CC9600 User Guide for complete Canadian Limitations information.

CommPlete Communications Server
v
Table of Contents
1 Introduction
Introduction ...................................................................................................................................................... 2
Manual Organization......................................................................................................................................... 2
LED Indicators................................................................................................................................................... 3
Power Supplies .................................................................................................................................................. 3
Technical Specifications.................................................................................................................................... 4
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
Dialing Commands...........................................................................................................................................15
Dial Modifier Commands.................................................................................................................................16
Phone Number Memory Commands...............................................................................................................18
Configuration Storage and Recall Commands.................................................................................................19
Modem Response (Result Code) Commands..................................................................................................19
Online Connection Commands........................................................................................................................22
RS-232 Interface Commands ...........................................................................................................................24
Error Correction and Data Compression Commands.....................................................................................26
Immediate Action Commands.........................................................................................................................27
Flow Control Commands .................................................................................................................................27
Escape Sequences .............................................................................................................................................29
Diagnostic Commands .....................................................................................................................................31
Speaker Settings................................................................................................................................................31
4 S-Registers
Introduction .....................................................................................................................................................34
S-Registers ........................................................................................................................................................34
Reading and Assigning S-Register Values .......................................................................................................38
Examples of Assigning Values.....................................................................................................................38
Examples of Reading Values .......................................................................................................................39
AT Commands that Affect S-Registers ............................................................................................................39

vi CommPlete Communications Server
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.............................................................................................................. 57
Index....................................................................................................................... 71

CommPlete Communications Server 1
1 Introduction

MT5634HD8/16 User Guide
2CommPlete Communications Server
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. The MT5634HD8/16 cards can be used in various combinations according to
the desired segment type; T1, PRI or Dual T1. There are no external connectors.
Three MT5634HD8 card must be installed per T1 segment. With eight modems per card, the CommPlete
Communications Server can support up to 24 simultaneous data line per segment.
One MT5634HD16 card and one MT5634HD8 card must be installed per PRI segment. With sixteen
modems per MT5634HD16 card and eight modems per MT5634HD8 card, the CommPlete
Communications Server can support up to 24 simultaneous data lines per segment. Analog calls are routed
to the MT5634HD16’s modems through a Primary Rate Interface (PRI) card which plugs into the slot next
to the RASCard that controls the segment. ISDN calls are routed to the PRI where its “B” channel(s)
process the call.
Three MT5634HD16 cards must be installed per Dual T1 segment. With sixteen modems per
MT5634HD16 card the CommPlete Communications Server can support up to 48 simultaneous data lines
per segment.
The MT5634HD8/16 operates as an enhanced ITU-T V.34 dial-up modem with a maximum K56flex
speeds, and is a fully digital K56flex server. As such, it includes the advanced features of other popular
Multi-Tech standalone modems.
The MT5634HD8/16 is registered by the FCC for direct connection to the public telephone networks. No
Data Access Arrangements (DAAs) are required.
The MT5634HD8/16 is fully compatible with the standard AT command set, and is therefore compatible
with all popular communications software packages.
This user guide will help you to install, configure, test, and use the MT5634HD8/16.
Manual Organization
Chapter 1 Introduction
This chapter describes the MT5634HD8/16 and its LED indicators, gives its technical specifications, and
provides a guide to the organization of the manual.
Chapter 2 Installation
This chapter describes how to install the MT5634HD8/16 into the CC9600 chassis.
Chapter 3 Command Mode Operation
This chapter provides an introduction to MT5634HD8/16 command mode fundamentals, followed by a
detailed explanation of each AT command, providing examples where applicable.
Chapter 4 S-Registers
This chapter describes the MT5634HD8/16’s S-registers, which are used to store various modem options.

1 Introduction
CommPlete Communications Server 3
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. The OH LED lights when the modem is off hook, which occurs when the
modem is dialing, online, or answering a call. The LED flashes when the modem is in the busy-out
or out-of-service state.
Power Supplies
DC voltages are supplied to all modems in the CC9600 rack through two PS9600 universal input switching
power supplies designed for conventional 115 or 230 VAC input. The power supplies are designed for
redundant, fail-safe operation. If one should fail, the other can supply the power requirements of the entire
CommPlete Communications Server. Each PS9600 power supply has one LED indicator that indicates the
presence of all supply voltages.

MT5634HD8/16 User Guide
4CommPlete Communications Server
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).
Uploads and other connections 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.42bis, V.42, V.34, ITU-T V.32bis, V.32, V.25bis, V.21, V.22bis, V.22,
V.23, V.17, Bell 212A* and 103/113*, K56flex
Compatibility (Fax) ITU-T Group 3, T.4, T.30, V.21, V.27ter, V.29, V.17, and EIA TR29.2
Error Correction ITU-T V.42 (MNP® Classes 3 and 4, and LAP-M)
Data Compression ITU-T V.42bis (4:1 throughput) or MNP 5 (2:1 throughput)
Speed Conversion Serial port data rates ad
j
ustable to 300, 1200, 2400, 4800,9600, 19,200, 38,400,
57,600, and 115,200 bps
Flow Control XON/XOFF, CTS/RTS
Mode of Operation Half or full duplex over dial-up lines; automatic or manual dialin
g
, automatic
or manual answer
Intelligent Features Fully AT command compatible; auto dial; redial; repeat dial*; pulse or tone
dial; dial pauses; call status display; auto-parity and data rate selection;
keyboard-controlled modem options; nonvolatile memory; on-screen
displays of modem parameters, stored telephone numbers, and help menus.
AT Commands 100% compatible with standard AT command set
Command Buffer 40 characters
Automatic Dialing Standard AT command asynchronous dialing
Modem Modulations FSK at 300 bps, PSK at 1200 bps, QAM at 2400, 4800, and 9600 bps (non-
trellis), QAM with trellis-coded modulation (TCM) at 9600, 12,000, 14,400,
16,800, 19,200, 21,600, 24,000, 26,400, 28,800, 31,200, 33,600, plus K56flex
speeds
Fax Modulations V.21 CH2 FSK at 300 bps
V.27ter DPSK at 4800 and 2400 bps
V.29 QAM at 9600 and 7200 bps
V.17TCM at 14400, 12000, 9600, and 7200 bps
Carrier Frequencies
ITU-T V.34
1600, 1646, 1680, 1800, 1829, 1867, 1920, 1959, 2000 Hz
Carrier Frequencies:
AT&T V.32terbo/
1800 Hz

1 Introduction
CommPlete Communications Server 5
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:
1200 Hz
2400 Hz
2400 Hz
1200 Hz
Carrier Frequencies:
Bell 103/113
(300 bps)
Transmit originate:
Receive originate:
Transmit answer:
Receive answer:
1270 Hz mark
1070 Hz space
2225 Hz mark
2025 Hz space
2225 Hz mark
2025 Hz space
1270 Hz mark
1070 Hz space
Carrier Frequencies:
V.21
Transmit originate:
Receive originate:
Transmit answer:
Receive answer:
980 Hz mark
1180 Hz space
1650 Hz mark
1850 Hz space
1650 Hz mark
1850 Hz space
980 Hz mark
1180 Hz space
Carrier Frequencies:
V.23
Transmit originate:
Receive originate:
Transmit answer:
Receive answer:
390 Hz mark
450 Hz space
1300 Hz mark
2100 Hz space
1300 Hz mark
2100 Hz space
390 Hz mark
450 Hz space
Fax Modulations V.21Ch2 FSK at 300 bps
V.27ter DPSK at 4800 and 2400 bps
V.29 QAM at 9600 and 7200 bps
V.17 TCM at 14400, 12000, 9600, and 7200 bps
Fax Carrier
Frequencies
V.21 CH2 (half duplex)
1650 Hz mark, 1850 Hz space for transmit originate
1650 Hz mark, 1850 Hz space for transmit answer
V.27ter: 1800 Hz Originate/Answer
V.29 QAM: 1700 Hz Originate/Answer
V.17 TCM: 1800 Hz Originate/Answer
Transmit Level -13 dBm
Frequency Stability +0.01%
Receiver Sensitivity -43 dBm under worst case conditions
AGC Dynamic Range 43 dB
Interface TIA / EIA RS-232/ITU-T V.24/V.28
Diagnostics Power-on self-test, local analog loop, local digital loop, remote digital loop.

MT5634HD8/16 User Guide
6CommPlete Communications Server
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
MT5634HD16
5 VDC at 1.5 A (MT5634HD8)
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
MT5634HD16
14 oz.
1 lb.
Limited Warranty Two years

CommPlete Communications Server 7
2 Installation

MT5634HD8/16 User Guide
8CommPlete Communications Server
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). The MT5634HD8/16 assembly plugs
into power and data, Ethernet, and T1 bus connectors on the inside of the CC9600 chassis. There are no
external connectors.
Figure 1. MT5634HD16 modem card.
Safety Warnings
✔Never install telephone wiring during a lightning storm.
✔Never install telephone jacks in wet locations unless the jacks are specifically designed for wet
locations.
✔Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected
at the network interface.
✔Use caution when installing or modifying telephone lines.
✔Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote
risk of electrical shock from lightning.
✔Do not use the telephone to report a gas leak in the vicinity of that leak.
✔Ports that are connected to other apparatus are defined as SELV. To ensure conformity to EN 41003,
ensure that these ports are only connected to the same type on the other apparatus.
48 pin
96 pin
24 pin
LEDs

2 Installation
CommPlete Communications Server 9
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.
•To reduce emissions, be sure to use blanking plates to cover empty slots in the CC9600 chassis.
•Cable, wiring, and any other apparatus connected between the MT5634HD8/16K modem and the point
of connection to any speech band circuit shall comply with the following:
1. The overall characteristics of the apparatus shall be such as to introduce no material effect upon
the electrical conditions presented to one another by the modem and the speech band circuit.
2. The apparatus shall comprise only
a. apparatus approved for the purpose of connection between the modem and a speech band
circuit; and
b. cable and wiring complying with a code of practice for the installation of equipment
covered by this part of BS 6328 or such other requirements as may be applicable.
Note: Such apparatus may have been approved subject to limitations in its use.
Installation Procedure
1. Unpack the MT5634HD8/16 assembly from its factory packaging. (You may wish to save the
packaging for possible future use.)
2. Perform a visual inspection of the MT5634HD8/16. If you are concerned about its condition, call
Technical Support for instructions.
3. The MT5634HD8/16 must be installed in a segment in which a RASCard is installed. Turn off the
RAS segment where the MT5634HD8/16 will be installed. (Turn off power to this segment.)
4. Remove a blank device front panel or previous MT5634HD8/16 card from the RAS segment used in
step 3. Do
not remove the back panel.
5. Support the MT5634HD8/16 by the front panel and the bottom edge of the card, and carefully place
it into the CC9600’s open device slot. Make sure the edges of the MT5634HD8/16 card mate properly
with the guides of the device slot.
6. Slide the MT5634HD8/16 into the CC9600 chassis until you feel the MT5634HD16’s connectors mate
with the CC9600’s bus connectors.

MT5634HD8/16 User Guide
10 CommPlete Communications Server
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. If the LEDs on the controller do not
light, turn off the RASCard segment. Reseat the cards by repeating steps 5 through 9. If you continue
to experience problems, consult your CommPlete
Owner’s Manual for troubleshooting tips.
Note: A self-test runs each time the CommPlete Communications Server is turned on. Refer to your
system Owner’s Manual for more details on the power-on self-test.

CommPlete Communications Server 11
3 AT Commands

MT5634HD8/16 User Guide
12 CommPlete Communications Server
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. 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. Using the basic AT command set, you can enter phone
numbers for automatic dialing, configure modem options, and monitor telephone activity. In addition,
you can command your modem to perform advanced features such as error correction, data compression,
speed conversion, and more.
This chapter describes the modem’s operational modes, and shows you how to use each of the modem’s
AT commands. These commands and responses are compatible with all systems and with all data
communications software using the AT command set.
Modes of Operation
The MT5634HD8/16 operates in two basic functional modes: command mode and online mode . (There is
also an in-between state,
wait-for-carrier , in which the modem is out of command mode but not yet
online.) When you power up the modem, it is in command mode, and is ready to accept and respond to
commands from your keyboard or software.
The modem enters online mode after it dials, connects with another modem, and detects a valid carrier
signal. If it does not detect a carrier signal within the time frame controlled by register S7, the modem
abandons the call and re-enters command mode.
You can make the modem enter online mode without dialing by typing either the D command or the A
command.
The modem exits online mode if the carrier signal is lost or intentionally dropped. When this happens, the
modem hangs up and re-enters command mode.
By sending certain “escape” characters to the modem while online, you can make it enter command mode
without losing the carrier signal.
Command Structure
You can control a wide variety of modem operations and options when the modem is in command mode.
AT commands tell the modem to dial a number, to answer a call, to operate at a certain speed, to use a
certain compression technique, and many other functions. AT commands consist of one or two letters,
which may be preceded by an ampersand (
& ), a percent character ( % ), or a slash character ( \ ). The Q
command, for example, determines whether the modem returns result codes, while the &Qcommand
selects the asynchronous communications mode.

3 AT Commands
CommPlete Communications Server 13
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.
Each command has a valid range of parameters; for example, &S can have only 0 or 1 as a parameter. Valid
commands always generate an OK result code, and a few generate an additional response, such as a list of
parameters. An invalid command, such as &S3, which has a parameter outside the valid range, generates
an ERROR
result code. Most commands have a default parameter that is enabled when the modem is
turned on or reset with the ATZ or AT&F command. Factory defaults are stored in read-only memory
(ROM), and cannot be changed. User-defined defaults can be stored in nonvolatile random-access
memory (NVRAM), and can be changed or deleted at will.
Command Editing
Always begin a command with the letters AT . Enter the entire command string in upper or lower case, but
do not cannot mix cases within the command string. The AT command is not executed until you press the
ENTER key. Use the BACKSPACE key to erase the previous command character. It will not erase the AT
characters once they are typed. If your keyboard has no BACKSPACE key, use CTRL+H. (You can change the
character recognized by the modem as BACKSPACE to any other ASCII character by changing register S5.)
Press CTRL+X to cancel an entire command that has been typed but not yet executed. This also clears the
command buffer. The effect is the same as backspacing the command, only quicker.
The modem stores characters entered in a command in it’s command buffer until they are executed by
pressing ENTER. The command buffer’s capacity is 40 characters. The attention characters (AT) do not
count towards the 40 character command line maximum. You may use spaces for increased readability
when typing a command. Spaces are not stored in the command buffer, and they do not count towards the
40 character command line maximum. Special characters, such as hyphens and parentheses, are not
allowed.
If you exceed the 40-character limit or type invalid characters, the command buffer is automatically erased
and an ERROR
message displays. You should retype the command within the 40-character limit, using
only the allowed characters.
The commands in this chapter are organized by function. A brief summary follows.

MT5634HD8/16 User Guide
14 CommPlete Communications Server
Table 1. AT Commands by Function
Topic Command Description Page
Dialing Action D Dial 15
HOn-hook/off-hook
Dial Modifiers L Redial last number 16
PPulse dialing
TTone dialing
VSpeakerphone mode
WWait for new dial tone
,Dialing pause
;Return to command mode after dialing
!Flash on-hook
$Detect call card tone
@Quiet answer
^Disable data calling tone transmission
Phone Number &Z Store a phone number 18
Memory DS Dial a stored number
Configuration &W Store configuration 18
Storage & Recall &F Load factory default configuration
ZReset modem
&Y Select stored configuration on power-up
Modem Responses E Echo command mode characters 19
(Result Codes) Q Result codes: enable/disable
VResult codes: verbose/terse
\V Protocol result code
XResult codes and call progress
&Q Select asynchronous communications
mode
%B View numbers in blacklist
Online Connection B Answer tone 22
CCarrier control
FEcho online data characters
&G Guard tones
-C Data calling tone
NModulation handshake
\T Disable inactivity timer
YLong space disconnect
RS-232 Interface &C Carrier Detect control 24
Controls &D Data Terminal Ready control
&S Data Set Ready control
Error Correction & \N0 or &Q6 Non-error correction mode 26
Data Compression \N3 Auto-reliable mode
\N2 Reliable mode
%C0 Data compression disabled
%C1 Data compression enabled