Multi-Tech MultiModemISI ISI3334/4, MultiModemISI, MultiModemISI ISI3334/8 Quick Reference Manual

Models ISI3334/4

ISI3334/8

Intelligent Serial Interface

Card with Integrated

Data/Fax Modems

Quick Reference Guide

Quick Reference Guide

82062500 Revision A — 1/20/97

MultiModemISI

This publication may not be reproduced, in whole or in part, without prior
expressed written permission from Multi-Tech Systems, Inc.
All rights reserved.

Copyright © 1997, by Multi-Tech Systems, Inc.

Multi-Tech Systems, Inc. makes no representations 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 Description

A Manual released at Revision A.

(1/20/97)
Trademarks of Multi-Tech Systems, Inc.:MultiExpress,MultiExpressFax, MultiModem,

MultiModemII, MultiModemµ, MultiModemISI, Multi-Tech and the Multi-Tech logo.
MNP, Microcom Network Protocol is a trademark of Microcom Inc.
AT&T is a trademark of American Telephone and Telegraph Co.
UNIX: X/Open Co. Ltd.
MS-DOS: Microsoft Corporation

SCO: The Santa Cruz Operation, Inc.
Pentium: Intel Corporation
PC-DOS: International Business Machines Corporation
Novell, NetWare, NetWare Connect and UNIXWare: Novell Corporation
Xenix:Xerox Corporation
All brand and product names mentioned in this publication are trademarks or registered
trademarks of their respective companies.

Multi-Tech Systems, Inc.

Mounds View, Minnesota 55112 U.S.A.

BBS [phone] or [phone]

Internet Address: http://www.multitech.com

Technical Writer: [e-mail]

2205 Woodale Drive

[phone] or [phone]

Fax-back Service 612-717-5888

U. S. FAX [phone]

Technical Support [phone]

Contents

Chapter 1 - Introduction and Description

1.1 Introduction....................................................................................6

1.2 Modem Features ...........................................................................6

1.3 Fax Features .................................................................................7

1.4 Product Description .......................................................................7

1.5 How to Use This Manual................................................................ 8

Chapter 2 - AT Commands & S-Registers

2.1 A T Commands.............................................................................12

2.2 Remote Configuration..................................................................28

2.2.1 Remote Configuration Procedures ................................. 28

2.2.2 Password Commands.................................................... 29

2.3 S-Registers..................................................................................30

2.4 Result Codes ............................................................................... 36

2.4.1 A T Commands and S-Register Summary....................... 38

Chapter 3 - Service, Warranty and Tech Support

3.1 Introduction.................................................................................. 40

3.2 Limited Warranty.......................................................................... 40

3.2.1 On-Line Warranty Registration ....................................... 41

3.3 Tech Support ............................................................................... 41

3.3.1 Recording MultiModemISI Information........................... 41

3.3.2 Service............................................................................ 42

3.4 The Multi-Tech BBS..................................................................... 43

3.4.1 Logging on to the Multi-Tech BBS .................................. 43

3.4.2 To Download a file .......................................................... 43

3.4.3 Upgrading the MultiModemISI ...................................... 45

3.4.4 Using FlashPro to Upgrade Firmware ............................. 45

3.5 About CompuServe/Internet ........................................................46

3.6 About the Multi-Tech Fax-Back Service....................................... 47

Appendixes

Appendix A - Technical Specifications ................................................... 50

Appendix B - ISI Testing Utilities ........................................................... 54

Appendix C - Tone Dial Frequencies..................................................... 58

Appendix D - Regulatory Information .................................................... 59

Index

iii

iv

Chapter 1 - Introduction and Description

ISI3334/4 Hardware/Driver Installation Manual

1.1 Introduction

Welcome to the world of data communications. You have acquired
one of the finest Intelligent Serial Interface cards available today, the
MultiModemISI. The MultiModemISI integrates ISI mutiport and

Enhanced

sized" add-on card which supports a high-speed interface up to

115.2K bps per port. This card has multiple on-board
(33.6K bps) data/V.17 (14.4K bps) fax modems providing high speed
buffering for multiple serial ports.

This Owner’s Manual contains product information specific to the
modem aspect of this card (e.g., AT Commands and S-Registers).
We recommend referring to your

Installation Manual

installation procedures.

V.34 modem technology on a single board. It is a "full

MultiModemISI Hardware/Driver

for hardware and operating system(s) driver

1.2 Modem Features

Enhanced

V.34

Your MultiModemISI meets the proposed
standard for data signalling rates as high as 33.6/31.2K bps full­duplex mode, and supports and is compatible with those features,
including EIA extended Automode, adaptive line probing, automatic
symbol rate and carrier frequency during start-up, and retrain and
rate renegotiation (in 2400 bps increments).

Your MultiModemISI features CCITT V.42 error correction and
V.42bis data compression, providing 100% error-free data
transmission. V.42 error correction incorporates MNP Classes 3
and 4, and LAP-M. You may select V.42bis data compression for 4­1 throughput, or MNP Class 5 for 2-1 throughput.

Your MultiModemISI offers interactive automatic dialing, as well as
Command Mode option configuration. You may store up to ten
command line/telephone numbers, of up to 60 characters each, in
the MultiModemISI’s nonvolatile memory.

The MultiModemISI pulse or tone dials, and recognizes dial tones
and busy signals for reliable call-progress detection. The
MultiModemISI can detect AT&T calling card tones. It is FCC­Registered for connection to telephone networks without any Data
Access Arrangements (DAA’s).

Enhanced

V.34 ITU

6

Your MultiModemISI also features Remote Configuration which
permits you to assist users at remote sites, saving you the time and
trouble of site visits and preventing misinterpretation of configuration
instructions.

1.3 Fax Features

Your MultiModemISI meets the CCITT V.17 standard for sending
and receiving faxes. When linked to a compatible fax machine or
modem, it can transmit faxes at 14.4 K bps. It also meets the
CCITT’s Group 3 Designation for sending and receiving faxes at
9600 bps; and Group 2 Designation for sending and receiving faxes
at 4800 bps. The MultiModemISI is also downward-compatible to
speeds as low as 300 bps, so it can send and receive faxes with
virtually any fax machine in the world.

1.4 Product Description

The MultiModemISI is ideally suited to use in PC networks
environments because it provides an integrated hardware solution
for remote access for both Windows NT and Novell-based LANs. In
particular, to ensure smooth Novell network integration, the
MultiModemISI ships with NetWare Loadable Module for NetWare
ConnectTM communication servers that enable it to support state-of­the-art features such as remote dialing and modem pooling. And,
the MultiModemISI easily integrates into the Windows NT platform
since it fully supports Microsoft's Remote Access Server software.
This allows it to comfortably operate with popular network protocols
such as TCP/IP and NetBIOS. The MultiModemISI ships with drivers
for other multiuser operating systems such as SCO® UNIX®, SCO
XenixTM, and SCO UNIXWare®.

Chapter 1 - Introduction and Description

The MultiModemISI includes an Intel 16 MHz 80186 proccesor and
256K of RAM that work dynamically to allocate resources to the
most active modems.

Simple to install, the MultiModemISI can be used to add multiport,

Enhanced

as easily as plugging in an expansion card, running the driver
software, and connecting the phone lines.

V.34 modem communications to a network host or server

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ISI3334/4 Hardware/Driver Installation Manual

Network managers have the option of starting with the base four
modem configuration (model #ISI334/4), and then adding four more
modems at a later date without having to use another PC expansion
slot.

This is accomplished by pairing one MultiModemISI with an auxiliary
module (model #ISI3334/EC) interfacing both with on-board
connectors.

Some MultiModemISI on-board components include one jumper
block for activating the number of ports in increments of 4 or 8. One
bank of 8 DIP-Switches for I/O address selection and one IRQ
jumper block, that control both the MultiModemISI and auxiliary
module I/O addressing and IRQ values.

When installing a single MultiModemISI in your PC, the installation
scripts create 8 devices. The first 4 devices are active, however, the
4 devices on the auxiliary module are not active until connected to
the MultiModemISI.

1.5 How to Use This Manual

This manual is divided into three chapters and three appendices.
The information contained in each chapter and appendix is as
follows:

Chapter 1 - Introduction and Description

Chapter 1 begins with a short product introduction and description;
followed by a guide (which you are now reading) to the use of this
manual.

Chapter 2- "AT" Commands and S-Registers

This chapter focuses on the use of “AT” Commands and S­Registers. Chapter 2 provides basic steps for originating and
answering calls and a summary of commands that enable the user
to establish, read, and modify parameters in addition to dialing.
Information on setting up high speed communication ports in SCO
UNIX and UNIXWare environments is also provided in this chapter.

8

Chapter 1 - Introduction and Description

Chapter 3 - Service, Warranty & Technical Support/BBS

Chapter 3 provides instructions for getting the MultiModemISI
serviced at the factory and warranty information. Instructions are
given for downloading firmware upgrades via FlashROM, accessing
Multi-Tech's Bulletin Board Service (
support via CompuServe and Internet forums.

BBS

) and receiving technical

Appendices

Appendix A - Technical Specifications
Appendix B - Tone Dial Frequencies
Appendix C - Regulatory Information

9

ISI3334/4 Hardware/Driver Installation Manual

10

Chapter 2 - AT Commands & S-Registers

ISI3334/4 Hardware/Driver Installation Manual

2.1 AT Commands

AT commands are the means by which you, and your
communications software, are able to communicate with and
configure your modem. They enable you to establish, read, and
modify parameters in addition to dialing. The following provides a
summary and brief explanation of the AT commands recognized by
the MultiModemISI.

COMMAND: AT
VALUES: n/a
DEFAULT: n/a
DESCRIPTION:

COMMAND: Return
VALUES: n/a
DEFAULT: n/a

DESCRIPTION:

Attention Code that precedes most
command strings except A/, A: and Escape
Codes.

Pressing RETURN key executes most
commands.

12

COMMAND: A
VALUES: n/a
DEFAULT: n/a
DESCRIPTION:

Answer call, even if no ring present.

COMMAND: A/
VALUES: n/a
DEFAULT: n/a
DESCRIPTION:

Repeat last command. (Do not precede this
command with AT. Do not hit RETURN to
execute.)

COMMAND: A:
VALUES: n/a
DEFAULT: n/a
DESCRIPTION:

Continuous redial (10 redials in DOC units)
of last number until answered. (Not used in
International Models.)

Chapter 2 - AT Commands, S-Registers and Result Codes

COMMAND: $A

n

VALUES: n = 0 or 1
DEFAULT: $A0
DESCRIPTION:

COMMAND: #A

$A0 discards data during auto-reliable time
period.

$A1 buffers data during auto-reliable time
period.

n

VALUES: n = 0 thru 3
DEFAULT: #A0
DESCRIPTION:

#A0 selects initial handshake at 33,600 to
31,200 to 28,800 to 24000 to 21,600 to
19,200 to 16,800 to 14,400 to 12,000 to
9600 to 4800 to 2400 to 1200 to 300 bps.

#A1 selects initial handshake at 33,600 bps
only.

#A2 selects initial handshake at 33,600 to
31,200 to 28,800 to 24000 to 21600 to
19,200 to 16,800 19,200 to 14,400 to 9600
to 4800 bps.

#A3 selects initial handshake at 2400 to
1200 to 300 bps.

VALUES: $
DEFAULT: n/a
DESCRIPTION:

COMMAND: &B

This symbol ($) placed in dialing string
enables the modem to detect AT&T's "call
card" tones to access user's calling card
when originating an on-line connection

n

VALUES: n = 0 or 1
DEFAULT: &B0
DESCRIPTION:

&B0 selects normal transmit buffer size.
&B1 selects reduced transmit buffer size.

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ISI3334/4 Hardware/Driver Installation Manual

COMMAND: &BS

n

VALUES: n = 0 or 1
DEFAULT: &BS1
DESCRIPTION:

COMMAND: $BA

&BS0 selects maximum transmit block size
of 64 characters.

&BS1 selects maximum transmit block size
of 256 characters (MNP mode)/128
characters (LAP-M mode).

n

VALUES: n = 0 or 1
DEFAULT: $BA0
DESCRIPTION:

COMMAND: B

$BA0 selects speed conversion on.
$BA1 selects speed conversion off.

n

VALUES: n = 0 or 1
DEFAULT: B0
DESCRIPTION:

COMMAND: &C

B0 selects V.21 answer tone.
B1 selects Bell answer tone. (Not used in

International Models.)

n

VALUES: n = 0, 1, 2 or 4
DEFAULT: &C1
DESCRIPTION:

&C0 forces Carrier Detect on.
&C1 lets Carrier Detect act normally.
&C2 lets Carrier Detect drop S24 time on

disconnect.
&C4 resets modem when Carrier Detect

drops.

14

COMMAND: &CD

n

VALUES: n = 0 or 1
DEFAULT: &CD0
DESCRIPTION:

&CD0 execute cleardown on disconnect.
&CD1 do not execute cleardown on

disconnect.

Chapter 2 - AT Commands, S-Registers and Result Codes

COMMAND: D

s

VALUES: s = phone #
DEFAULT: n/a
DESCRIPTION:

COMMAND: DsN

Dial a telephone number
include up to 60 digits or T, P, R, comma
and ; characters.

d

“s”

, where s may

VALUES: s = phone # and d = 0 thru 9
DEFAULT: n/a
DESCRIPTION:

COMMAND: &D

Store telephone number. To store, phone
number
and then Directory Number

”s“

is entered and followed by N

“d.”

n

VALUES: n = 0 thru 3
DEFAULT: &D2
DESCRIPTION:

&D0 means DTR is ignored
&D1 means modem returns to command

mode.
&D2 lets modem react to DTR normally.
&D3 causes modem to reset to modem

default parameters.

COMMAND: $D

n

VALUES: n = 0 or 1
DEFAULT: $D0
DESCRIPTION:

COMMAND: %DF

$D0 disables DTR Dialing.
$D1 enables DTR Dialing.

n

VALUES: n = 0 or 1
DEFAULT: %DF0
DESCRIPTION:

%DF0 selects V.34 Line Probe Data in Graph
Format.

%DF1 selects V.34 Line Probe Data in Table
Format.

15

ISI3334/4 Hardware/Driver Installation Manual

COMMAND: %DP

n

VALUES: n = 0 or 1
DEFAULT: %DP0
DESCRIPTION:

COMMAND: E

%DP0 selects not to read Line Probe
Information from DSP during handshaking.

%DP1 selects read Line Probe Information
from DSP during handshaking.

n

VALUES: n = 0 or 1
DEFAULT: E1
DESCRIPTION:

COMMAND: $EB

E0 selects do not echo Command mode
characters.

E1 selects echo Command mode
characters.

n

VALUES: n = 0 or 1
DEFAULT: $EB0
DESCRIPTION:

COMMAND: &E

$EB0 selects 10 bit mode.
$EB1 selects 11 bit mode.

n

VALUES: n = 0 thru 15
DEFAULT: &E1, &E4, &E6, &E10, &E13, &E15
DESCRIPTION:

&E0 selects no error correction.
&E1 selects V.42 Auto-reliable Mode.
&E2 selects V.42 Reliable Mode.
&E3 selects no modem-initiated flow control.
&E4 selects CTS modem-initiated flow

control.
&E5 selects Xon/Xoff modem-initiated flow

control.
&E6 selects Xon/Xoff not passed through.
&E7 selects Xon/Xoff passed through.
&E8 selects Enq/Ack pacing off.
&E9 selects Enq/Ack pacing on.
&E10 selects Normal Mode flow control off.

16

Chapter 2 - AT Commands, S-Registers and Result Codes

&E11 selects Normal Mode flow control on.
&E12 selects Pacing off.
&E13 selects Pacing on.
&E14 selects data compression disabled.
&E15 selects data compression enabled.

COMMAND: %E

n

VALUES: n=0 thru 5
DEFAULT: %E1

DESCRIPTION:

COMMAND: #F

%E0 = Modem Won’t Escape.
%E1 = +++ Method (default setting).
%E2 = Break Method.
%E3 = Either +++ or Break Method.
%E4 = No "OK" Response to +++
%E5 = "OK" Response to +++

n

VALUES: n = 0 thru 2
DEFAULT: #F2
DESCRIPTION:

COMMAND: &F

#F0 means no fallback when on-line.
#F1 means fallback from 33600 to 4800 bps

when on-line (increments of 2400 bps).
#F2 means fallback to 4800 bps from 33.6K

bps/fall forward if line improves (increments
of 2400 bps).

n

VALUES: n = 0, 8 or 9
DEFAULT: &F8
DESCRIPTION:

&F loads factory default values from ROM.
&F8 reads factory default values when &F is

issued.
&F9 reads parameters stored in nonvolatile

memory when &F is issued.

17

ISI3334/4 Hardware/Driver Installation Manual

COMMAND: $F

n

VALUES: n = 0 or 1
DEFAULT: $F1
DESCRIPTION:

COMMAND: $FC

$F0 selects do not fall back to normal
connect if CR received.

$F1 selects fall back to normal connect if
CR received.

n

VALUES: n = 0 or 1
DEFAULT: $FC1
DESCRIPTION:

COMMAND: &G

$FC0 selects data pump to not transmit 5
second 2100Hz signal.

$FC1 selects data pump to transmit 5
second 2100Hz signal.

n

VALUES: n = 0, 1 or 2
DEFAULT: &G0
DESCRIPTION:

&G0 turns off CCITT guard tones.
&G1 turns on CCITT 550 Hz guard tone.
&G2 turns on CCITT 1800 Hz guard tone.

(Not used in International models.)

18

COMMAND: H

n

VALUES: n = 0 or 1
DEFAULT: n/a
DESCRIPTION:

COMMAND: $H

H0 selects Hang Up (go on hook).
H1 selects Go Off Hook.

n

VALUES: n = 1 thru 3
DEFAULT: Read Only Command
DESCRIPTION:

$H1 selects Help Screen #1.
$H2 selects Help Screen #2.
$H3 selects Help Screen #3.

Chapter 2 - AT Commands, S-Registers and Result Codes

COMMAND: I

n

VALUES: n = 0,1, 2, 3 or 5
DEFAULT: Read Only Command
DESCRIPTION:

I0 requests modem ID #.
I1 requests firmware revision #.
I2 for Model of modem.
I3 MTS internal use.
I5 outputs DSP version.

COMMAND: L
VALUES: 5, 6, 7, 8, 9, 10 and 11
DEFAULT: Read Only Command
DESCRIPTION:

L5 lists all current operating parameters.
L6 lists all current S-Register values.
L7 lists additional parameters.
L8 lists current on-line diagnostics.
L9 displays Signal Strength Information.
L10 displays Signal to Noise Ratio

Information.
L11 displays Noise Information.

COMMAND: I9
VALUES: N/A
DEFAULT: Read Only Command
DESCRIPTION:

The I9 command is a query to display this
modem's characteristics when operating
within Windows 95. Entering
invokes
monitor.

(The response to the query reveals that
this modem is a ISI, 28.8K, FAX and Class
Two capable device.)

ISI 28800 FAX CT

ATI9

<cr>

on your video

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ISI3334/4 Hardware/Driver Installation Manual

COMMAND: #L

n

VALUES: n = 0 thru 3
DEFAULT: #L0
DESCRIPTION:

COMMAND: $MB

#L0 selects modems to negotiate V.42
Mode.

#L1 selects MNP on and LAP-M off.
#L2 selects LAP-M on and MNP off.
#L3 selects no detection phase, go directly

to LAP-M.

n

VALUES: n = speed
DEFAULT: $MB33600 bps
DESCRIPTION:

$MB75 selects CCITT V.23 mode.
$MB300 selects 300 bps on-line.
$MB1200 selects 1200 bps on-line.
$MB2400 selects 2400 bps on-line.
$MB4800 selects 4800 bps on-line.
$MB9600 selects 9600 bps on-line.
$MB14400 selects 14400 bps on-line.
$MB19200 selects 19200 bps on-line.
$MB28800 selects 28800 bps on-line.
$MB33600 selects 33600 bps on-line.

20

COMMAND: N

d

VALUES: d = 0 thru 9
DEFAULT: n/a
DESCRIPTION:

COMMAND: NdN

Dial stored telephone number
include the letter D in this command.)

e

“d”

(Do not

VALUES: d = 0 thru 9; e = any other number 0 thru 9
DEFAULT: n/a
DESCRIPTION:

Number Linking. If first number dialed is
busy, another stored number may be
automatically dialed.

Chapter 2 - AT Commands, S-Registers and Result Codes

COMMAND: O
VALUES: n/a
DEFAULT: n/a
DESCRIPTION:

Exit Command Mode and go into On-Line
Mode.

COMMAND: P
VALUES: n/a
DEFAULT: Tone Dial
DESCRIPTION:

Modem will pulse-dial numbers following the
P.

COMMAND: &P

n

VALUES: n = 0 or 1
DEFAULT: &P1
DESCRIPTION:

COMMAND: #P

&P0 selects 60-40 pulse ratio.
&P1 selects 67-33 pulse ratio.

n

VALUES: n = 0, 1 or 2
DEFAULT: #P2
DESCRIPTION:

COMMAND: Q

#P0 selects no parity.
#P1 selects odd parity.
#P2 selects even parity.

n

VALUES: n = 0, 1 or 2
DEFAULT: Q0
DESCRIPTION:

COMMAND: &Q

Q0 means Result Codes sent.
Q1 means Result Codes will be suppressed

(quiet).
Q2 means Dumb Answer Mode.

n

VALUES: n = 0 or 1
DEFAULT: &Q0
DESCRIPTION:

&Q0 selects Multi-Tech command set.
&Q1 selects AT command set.

21

ISI3334/4 Hardware/Driver Installation Manual

COMMAND: R

n

VALUES: n = 0 or 1
DEFAULT: R0
DESCRIPTION:

COMMAND: &R

R0 selects modem will not reverse modes.
R1 selects modem will reverse modes.

n

VALUES: n = 0, 1 or 2
DEFAULT: &R1
DESCRIPTION:

&R0 lets Clear to Send act normally.
&R1 forces Clear to Send on in Command

Mode.
&R2 drops for 1 second on disconnect.

COMMAND: $Rn
VALUES: n = 0 or 1
DEFAULT: $R0
DESCRIPTION:

COMMAND: &RF

$R0 selects disconnect after 12 retransmits.
$R1 selects do not disconnect after 12

retransmits.

n

VALUES: n = 0 or 1
DEFAULT: &RF1
DESCRIPTION:

&RF0 selects CTS follows RTS.
&RF1 selects CTS to act independently.

22

COMMAND: Sr=n
VALUES: r = 0-11, 13, 15-17, 24-26, 29, 30, 32, 34,

36, 37, 48
DEFAULT: n/a
DESCRIPTION:

COMMAND: S

Sets value of S-Register

where

“n”

is entered in decimal format.

r?

“r”

to value of

“n”

VALUES: r = 0-11, 13, 15-17, 24-26, 29, 30, 32, 34,

36, 37, 48
DEFAULT: n/a
DESCRIPTION:

Reads value of S-Register

value in 3-digit decimal format.

“r”

and displays

,

Chapter 2 - AT Commands, S-Registers and Result Codes

COMMAND: $SBn
VALUES: n = speed
DEFAULT: $SB115200 bps
DESCRIPTION

: $SB300 selects 300 bps at serial port.

$SB1200 selects 1200 bps at serial port.
$SB2400 selects 2400 bps at serial port.
$SB4800 selects 4800 bps at serial port.
$SB9600 selects 9600 bps at serial port.
$SB19200 selects 19,200 bps at serial port.
$SB38400 selects 38,400 bps at serial port.
$SB57600 selects 57600 bps at serial port.
$SB115200 selects 115200 bps at serial

port.

COMMAND: &SFn
VALUES: n = 0 or 1
DEFAULT: &SF0
DESCRIPTION

: &SF0 selects DSR follows CD.

&SF1 selects DSR independent.

COMMAND: &Sn
VALUES: n = 0, 1 or 2
DEFAULT: &S1
DESCRIPTION

: &S0 forces Data Set Ready On.

&S1 lets Data Set Ready act normally.
&S2 Data Set Ready drop is regulated by

S24 on disconnect.

COMMAND: T
VALUES: n/a
DEFAULT: Tone Dial
DESCRIPTION

: Modem will tone-dial numbers following the T.

23

ISI3334/4 Hardware/Driver Installation Manual

COMMAND: &Tn
VALUES: n = 4 or 5
DEFAULT: &T5
DESCRIPTION:

&T4 selects Enable Response to Request

for Remote Digital Loopback.

&T5 selects Disable Response to Request

for Remote Digital Loopback.

COMMAND: #Tn
VALUES: n = 0 or 1
DEFAULT: #T1
DESCRIPTION:

#T0 turns off Trellis Coded Modulation

#T1 turns on Trellis Coded Modulation

COMMAND: Un
VALUES: n = 0, 1, 2, or 3
DEFAULT: n/a
DESCRIPTION

: U0 places modem in Analog Loop Originate

Mode.

U1 places modem in Analog Loop Answer

Mode.

U2 places modem in Remote Digital

Loopback test mode.

U3 places modem in Local Digital Loopback

Test Mode.

24

COMMAND: Vn
VALUES: n = 0 or 1
DEFAULT: V1
DESCRIPTION

: V0 selects Result Codes sent as digits(terse

response).

V1 selects Result Codes sent as words

(verbose response).

Chapter 2 - AT Commands, S-Registers and Result Codes

COMMAND: #Vn
VALUES: n = 0 or 1
DEFAULT: #V1
DESCRIPTION

: User can bypass V.32terbo handshaking

process.
#V0 selects V.32terbo enabled in originate/

answer modes.
#V1 selects V.32terbo disabled in originate/

answer modes.

COMMAND: W
VALUES: n/a
DEFAULT: n/a
DESCRIPTION

: Wait for new dial-tone.

COMMAND: &Wn
VALUES: n = 0 or 1
DEFAULT: &W1
DESCRIPTION:

&W0 causes modem to store its current
parameters in nonvolatile RAM, and modem
will load these for future sessions instead of
reading factory ROM defaults, unless &F
command used.

&W1 causes modem to not store
parameters.

COMMAND: Xn
VALUES: n = 0, 1, 2, 3 or 4
DEFAULT: X0
DESCRIPTION

: X0 selects Basic Result Codes (w/o

CONNECT 1200, CONNECT 2400).
X1 selects Extended Result Codes (w/

CONNECT 1200, CONNECT 2400).
X2 selects Standard AT Command set with

NO DIAL TONE.
X3 selects Standard AT Command set with

BUSY.
X4 selects Standard AT Command set with

NO DIAL TONE and BUSY.

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ISI3334/4 Hardware/Driver Installation Manual

COMMAND: #Xn
VALUES: n = 0 or 1
DEFAULT: #X0
DESCRIPTION

: #X0 selects single XOFF character sent

until XON level returns.

#X1 selects multiple XOFF characters after

buffer level is full.

COMMAND: Yn
VALUES: n = 0 or 1
DEFAULT: Y0
DESCRIPTION

: Y0 disables sending or responding to long

space “break”.

Y1 enables sending or responding to long

space “breaks”.

COMMAND: Z
VALUES: n/a
DEFAULT: n/a
DESCRIPTION

: All configuration parameters are reset to

default values.

26

COMMAND: , (Comma)
VALUES: n/a
DEFAULT: n/a
DESCRIPTION

: Causes pause during dialing.

COMMAND: ;(Semi-Colon)
VALUES: n/a
DEFAULT: n/a
DESCRIPTION:

Causes return to Command Mode after

dialing.

COMMAND: ! (Exclamation)
VALUES: n/a
DEFAULT: n/a
DESCRIPTION

: Causes modem to flash On-Hook.

Chapter 2 - AT Commands, S-Registers and Result Codes

COMMAND: @
VALUES: n/a
DEFAULT: n/a
DESCRIPTION

: Causes modem to wait for ringback, then 5

seconds of silence before processing next
part of command.

COMMAND: +++AT<CR>
VALUES: n/a
DEFAULT: n/a
DESCRIPTION

: In-band Escape Sequence. Places modem

in Command mode while still remaining On­Line. Enter +++ followed by the letters A
and T, up to ten command characters, and a
RETURN.

COMMAND: BREAK AT<CR>
VALUES: n/a
DEFAULT: n/a
DESCRIPTION:

Out-of-band Escape Sequence. Places
modem in Command mode while still
remaining On- Line. Not preceded by AT.
Enter a BREAK signal, followed by the
letters A and T, up to sixty command
characters, and hit RETURN.

27

ISI3334/4 Hardware/Driver Installation Manual

2.2 Remote Configuration

The Remote Configuration feature is a network management tool
that allows you to configure modems remotely. This means you
could configure modems anywhere in your network from one
location without having to visit the sites or rely on remote users to
follow your instructions. With Remote Configuration, which is
protected by two level security, you can downline load new
parameters, program new V.42 capabilities and implement new
features. Remote Configuration also makes troubleshooting a
remote location a lot easier.

The way Remote Configuration works is that S-Register S13 has
been set-up to contain the special Remote Configuration escape
code. When calling a Remote Configuration equipped modem, you
enter the proper Remote Escape code to enable entering your Set­up Password. After entering it, you can then execute AT commands
as if you were connected locally. If you set S-Register S13 to zero,
Remote Configuration is disabled.

2.2.1 Remote Configuration Procedures

The procedures for using the Remote Configuration features are the
same whether or not a call originates from the remote modem. Once
the modem is on-line, perform the procedures in Table 2-1.

28

Table 2-1
Remote Configuration Operation Procedures

Step Procedure

1. Remote Escape Configuration requires %%%<CR> to be sent if

the default value in S-Register S13 has not been changed. The
modem responds with:

1. - DATA Mode

2. - COMMAND Mode

2. You then select 1 or 2. With 1, the modem goes back into data

mode and with 2, the modem responds with the following:

Password>

Chapter 2 - AT Commands, S-Registers and Result Codes

Table 2-1 (cont'd)
Step Procedure

3. Enter your Set-up Password, and if the code is correct the
modem responds with:

OK

You can now use any AT commands of the modem being
remotely configured as if they were being entered locally. You
cannot change the Set-up of the LOGIN Password until you
enter the proper LOGIN Password.

4. When you are done entering AT commands and you want to
exit, type

1. DATA Mode

2. COMMAND Mode

AT0

and hit RETURN. The modem responds with:

5. Enter a 1 to go back on-line with your computer, or enter 2 and
the correct password to talk to your modem.

2.2.2 Password Commands

COMMAND: #Ixxxxxxxxxx
VALUES: n/a
DEFAULT: #IMULTITECH
DESCRIPTION:

COMMAND: #Syyyyyyyyyy
VALUES: n/a
DEFAULT: #SMODEMSETUP
DESCRIPTION:

Login Password is any keyboard characters
(x) (upper/lower case sensitive), minimum 6
and maximum 10 characters. The default
Login Password is #IMULTITECH.

Set-up Password is any keyboard
characters (y) (upper/lower case sensitive),
minimum 6 and maximum 10 characters.
The default Set-up Password is
#SMODEMSETUP.

29

ISI3334/4 Hardware/Driver Installation Manual

2.3 S-Registers

Certain Command Mode configurations are stored in memory
registers called, S-Registers. The S command is used to assign a
value to, and to read the current value of an S-Register. To assign a
value to an S-Register, enter the letter S, followed by the S-Register
number and an equals sign (=), and then a decimal response to the
message
read an S-Register value, enter the letter S followed by the S­Register number and a question mark (?), then hit RETURN. To
verify that the S-Register value was entered correctly, enter for
example,
of the assigned value given to that S-Register.

S0
Number of Rings Until Modem Answers

S1
Rings Which Have Occurred

“ENTER THE NEW VALUE IN DECIMAL FORMAT”.

ATS8?

Unit: 1 ring
Range: 0-255
Default: 0
Description: Sets the number of rings before the modem

Unit: 1 ring
Range: 0-255
Default: 0
Description: Counts the number of rings that have

and hit RETURN. You should receive a response

answers.

occurred.

To

30

S2
Escape Code Character

Unit: ASCII Character
Range: 0-127
Default: 43 (
Description: Defines the escape code character.

+ sign

)

Chapter 2 - AT Commands, S-Registers and Result Codes

S3
Return Character

Unit: ASCII Character
Range: 0-127
Default: 13
Description: Defines the character recognized as

S4
Line Feed Character

Unit: ASCII Character
Range: 0-127
Default: 10
Description: Defines the character recognized as LINE

S5
Backspace Character

Unit: ASCII Character
Range: 0-127
Default: 8
Description: Defines the character recognized as

Carriage Return (RETURN) or “Enter”.

FEED.

BACKSPACE.

S6
Wait Time for Dial Tone

Unit: 1 second
Range: 2-255, 4-255**, 4-7***
Default: 2, 4**, 4***
Description: Sets the time the modem waits after the

RETURN key is pressed before executing a
dial command.

* Value for International and DOC units
** Value for International units only

***BABT models only

31

ISI3334/4 Hardware/Driver Installation Manual

S7
Time for Carrier (Abort Timer)

Unit: 1 second
Range: 1-255, 1-55*
Default: 45, 55*
Description: Defines the Abort Timer (lack of carrier)

delay time.

S8
Pause Time for Comma

Unit: 1 second
Range: 0-255, 4-255**, 4-7***
Default: 2, 4**, 4***
Description: Sets the length of the pause caused by a

comma inserted in a dialing command.

S9
Carrier Detect Response Time

Unit: 100 mSec.
Range: 1-255
Default: 6
Description: Sets the time delay for when the modem

first detects a valid incoming carrier signal
and when the modem turns on its Carrier
Detect circuit.

32

S10
Carrier Loss Disconnect Delay Time

Unit: 100 mSec.
Range: 0-255
Default: 7
Description: Sets the time a carrier signal must be lost

before the modem disconnects.

* Value for International and DOC units
** Value for International units only

***BABT models only

Chapter 2 - AT Commands, S-Registers and Result Codes

S11
Tone Dialing: Tone Spacing and Duration

Unit: 1 mSec.
Range: 1-255, 80-255*, 80-255***
Default: 70, 80*, 80***
Description: Sets the time duration of spacing between

tone in tone-dialing.

S13
Remote Configuration Escape Character

Unit: ASCII Character
Range: 0-127
Default: 37 (

% sign

)

Description: Defines the remote configuration escape

character.

S17
Changing Break Time

Unit: 10 mSec.
Range: 0-2.5 sec
Default: 250
Description: S17 defines the break time (space) to local

PC.

S24
PBX/CBX Disconnect Drop Time for DSR/CTS/CD

Unit: 50 mSec.
Range: 0-255
Default: 20
Description: Defines DSR/CTS/CD dropout time. The

default of 20 equals one second.

* Value for International and DOC units
** Value for International units only

***BABT models only

33

ISI3334/4 Hardware/Driver Installation Manual

S25
DTR Dropout Time

Unit: 100 mSec.
Range: 0, 1 through 255
Default: 0
Description: Defines DTR dropout time. 0 default equals

50ms.

S30
Inactivity Timer

Unit: 1 minute
Range: 0-255
Default: 0
Description: Inactivity timer used to disconnect the

modem.

S32
Time Elapse for Escape Sequence

Unit: 1 second
Range: 0-255
Default: 20
Description: Sets the duration in which modem waits for

a <CR> to be entered during escape
sequence execution.

34

S34
Buffer Length of Command Mode...After On-line Escape Sequence

Unit: ASCII Character
Range: 0-60
Default: 10
Description: Sets buffer length of command mode after

on-line escape sequence.

S36
Time Between DTR Inactive and Modem Off-Hook

Unit: 1 Second
Range: 0-255 seconds
Default: 0
Description: Sets the time between DTR inactive (low)

and the modem going
Busy-out feature is disabled with S36=0.

off-hook

. The DTR

Chapter 2 - AT Commands, S-Registers and Result Codes

S37
Time Between DTR Active and Modem On-Hook

Unit: 1 Second
Range: 0-255 seconds
Default: 5
Description: Sets the time between DTR being active

and the modem going

on-hook

S48
Program V.34 Connect Speeds

Unit: N/A
Range: 33, 31, 28, 26, 21, 19, 16, 14, 12, 9 and 4
Default: 0
Description: Defines which speed modem connects

within V.34 mode scope (e.g., S48 = 21
means maximum connect speed is 21.6K).
This register compensates for line
conditions that will not support higher V.34
speeds (e.g., 33.6K, 31.2K, 28K, 26.4K,
24K...). The modem default is a value of 0,
which indicates a connection attempt of

33.6K.

(not busy).

35

ISI3334/4 Hardware/Driver Installation Manual

2.4 Result Codes

The MultiModemISI Command mode provides you with several
responses, or
operation. These Result Codes are displayed on your video monitor.

“Result Codes”

, that can aid you in Command mode

AT&Q0

selects Multi-Tech responses with Reliable/LAP-M/

Compressed modifiers. The terse result code for

9. AT&Q1

result code for

selects Standard AT command set responses. The terse

CONNECT 2400

is 10. The following tables list result

codes generated by the &Q command.

Table 2-2
&Q0 "Multi-Tech" Result Codes

TERSE VERBOSE

0OK
1 CONNECT
2 RING
3 NO CARRIER
4 ERROR
5* CONNECT 1200
6 NO DIALTONE
7 BUSY
8 NO ANSWER
9* CONNECT 2400
11* CONNECT 4800
12* CONNECT 9600
13* CONNECT 14400
19* CONNECT 19200
21* CONNECT 21600
24* CONNECT 24000
26* CONNECT 26400
28* CONNECT 28800
31* CONNECT 31200
33* CONNECT 33600

CONNECT 2400

is

36

* With MNP error correction on, RELIABLE (or R) is added to these result codes.
With LAP-M error correction on, LAP-M (or L) is added to these result codes. With
data compression on, COMPRESSED (or C) is added. (Note these
Result Codes are displayed when your modem is set-up to do so with an X1, X2,
X3, or X4 command.)

"Extended"

Chapter 2 - AT Commands, S-Registers and Result Codes

Table 2-3
&Q1 "Standard AT" Result Codes

TERSE VERBOSE

0OK
1 CONNECT
2 RING
3 NO CARRIER
4 ERROR
5 CONNECT 1200
6 NO DIAL TONE
7 BUSY
8 NO ANSWER
10 CONNECT 2400
11 CONNECT 4800
12 CONNECT 9600
13 CONNECT 14400
19 CONNECT 19200
21 CONNECT 21600
24 CONNECT 24000
26 CONNECT 26400
28 CONNECT 28800
31 CONNECT 31200
33 CONNECT 33600

*Error Correction/Data Compressed modifiers are not displayed with Standard AT
Result Codes.

37

ISI3334/4 Hardware/Driver Installation Manual

2.4.1 AT Commands and S-Register Summary

The multiple modems on the MultiModemISI card have a default
configuration to connect with another 33,600 bps modem that
support error correction, data compression and flow control. If the
remote modem is not compatible, the MultiModemISI can match
protocols, provided the protocols are industry standard (i.e., ITU-T,
AT&T or Bell) and not proprietary.

AT&W0 (or AT&W) command, used in conjunction with specific
other AT commands and S-Registers, can reconfigure the
MultiModemISI to conform to a specific application. The
MultiModemISI can store its configuration parameters and S­Register values in its nonvolatile memory (RAM). This command
also sets the MultiModemISI upon power up, or when it is reset with
an ATZ command, the MultiModemISI reads all its configuration and
S-Register parameters from RAM, and not from the factory settings
in ROM (note you may recall factory installed defaults by entering
AT&F8&W0).

The &W command changes the configuration parameters stored in
RAM that you specifically intend to alter. All other default
parameters remain unchanged.

38

The AT&W1 command sets the MultiModemISI so that it does not
store its parameters in RAM, and on power up or when an ATZ
command is issued, parameters are read from the factory default
settings in ROM.

You may first view the MultiModemISI current modem operating
parameters by using the ATL5, ATL6 and ATL7 commands to
display the current modem configuration; then alter the modem's
configuration settings if your application requires you to do so.

Chapter 3 - Service, Warranty and Tech Support

ISI3334/4 Hardware/Driver Installation Manual

3.1 Introduction

This chapter starts out with statements about your MultiModemISI's
2-year warranty. The next section, Tech Support, should be read
carefully if you have questions or problems with your MultiModemISI.
It includes the technical support telephone numbers, space for
recording pertinent information, and an explanation of how to send in
this product should you require service. The final five sections
explain how to use our Bulletin Board Service (
MultiModemISI via Flash PROM, sections on CompuServe and
Internet forums, a description of Multi-Tech's Fax-Back service and a
brief section on Safety Warnings.

3.2 Limited Warranty

BBS

), upgrading the

Multi-Tech Systems, Inc. (
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.
This warranty does not apply to any products which have been
damaged by lightning storms, water, or power surges or which have
been neglected, altered, abused, used for a purpose other than the
one for which they were manufactured, repaired by the customer or
any party without MTS’s written authorization, or used in any manner
inconsistent with MTS’s instructions.

MTS’s entire obligation under this warranty shall be limited (at MTS’s
option) to repair or replacement of any products which prove to be
defective within the warranty period, or, at MTS’s option, issuance of
a refund of the purchase price. Defective products must be returned
by Customer to MTS’s factory transportation prepaid.

MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES
AND UNDER NO CIRCUMSTANCES WILL ITS LIABILITY EXCEED
THE PURCHASE PRICE FOR DEFECTIVE PRODUCTS.

“MTS”

) warrants that its products will be

40

3.2.1 On-Line Warranty Registration

If you wish to register your modem on-line, you can do so at the
following address:

http://www.multitech.com/support/register.htm

3.3 Tech 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(s), call 1­800-972-2439. Please fill out the information (below), and have it
available when you call. If you require service, the tech support
specialist will advise you in Multi-Tech's service procedure (Section

3.3.2).

3.3.1 Recording MultiModemISI Information

Please fill in the following information on your Multi-Tech product.
This will help tech support in answering your questions.

Serial No.: ______________________________
Firmware Version: ______________________________
Driver Type/Version: ______________________________

COM Port #: ______________________________
IRQ Setting: ______________________________

Chapter 3 - Service, Warranty and Tech Support

Please note the status of your MultiModemISI before calling tech
support (e.g., screen messages, diagnostic test results, problems
with a specific application, etc). Use the space below to note status:

41

ISI3334/4 Hardware/Driver Installation Manual

3.3.2 Service

If your tech support specialist decides that service is required, your
unit may be sent (freight prepaid) to our factory. Return shipping
charges will be paid by Multi-Tech Systems.

Include the following with this product:

• a description of the problem.

• return billing and return shipping addresses.

• contact name and phone number.

• check or purchase order number for payment if the
MultiModemISI is out of warranty. (The standard repair charge is
$95. This price is valid at the time of this publication but could
change in the future. Check with your technical support
specialist.)

• if possible, note the name of the technical support specialist with
whom you spoke.

If you need to inquire about the status of the returned product, be
prepared to provide the serial number of the product sent (see
Section 3.3.1).

42

Send MultiModemISI to this address:

MULTI-TECH SYSTEMS, INC.

2205 WOODALE DRIVE

MOUNDS VIEW, MINNESOTA 55112

ATTN: SERVICE OR REPAIRS

Chapter 3 - Service, Warranty and Tech Support

3.4 The Multi-Tech BBS

For customers who do not have Internet access, Multi-Tech
maintains a bulletin board system (BBS) that mirrors its FTP site.
Information available from the BBS includes new product
information, product upgrade files, and problem-solving tips. The
phone number for the Multi-Tech BBS is [phone] (USA and
Canada) or [phone] (international and local).

The BBS can be accessed by any asynchronous modem operating
at 1200 bps to 33,600 bps at a setting of 8 bits, no parity, and 1 stop
bit (8-N-1).

3.4.1 Logging on to the Multi-Tech BBS

1. Set your communications program to 8-N-1.

2. Dial our BBS at [phone] (USA and Canada) or (612)

785-3702 (international and local).

3. At the prompts, type your first name, last name, and password;

then press ENTER. If you are a first time caller, the BBS asks if
your name is spelled correctly. If you answer yes, a
questionnaire appears. You must complete the questionnaire to
use the BBS on your first call.

4. Press ENTER until the Main Menu appears. From the Main

Menu you have access to two areas: the Files Menu and News.
For help on menu commands, type ?.

3.4.2 To Download a file

If you know the file name

1. From the Main Menu, type F to access the Files Menu, then type

D.

2. Enter the name of the file you wish to download from the BBS.

3. If a password is required, enter the password.

4. Answer Y or N to the automatic logoff question.

5. Select a file transfer protocol by typing the indicated letter, such

as Z for Zmodem (the recommended protocol).

43

ISI3334/4 Hardware/Driver Installation Manual

6. If you select Zmodem, the transfer will begin automatically. If you
select another protocol, you may have to initiate the transfer
yourself. (In most datacomm programs, the PAGE DOWN key
initiates the download.)

7. When the download is complete, press ENTER to return to the
File Menu.

8. To exit the BBS, type G and press ENTER.

If you don’t know the file name

1. From the Main Menu, type F to access the Files Menu. For a list
of file areas, type L, press ENTER, then type L and press
ENTER again. (If you do not type the second L, you will list all of
the files on the BBS.)

2. Mark each file area you would like to examine by typing its list
number and pressing ENTER.

3. Enter L to list all the files in the selected file areas. Enter C to go
forward in the file list and P to go back.

4. To mark one or more files for download, type M, press ENTER,
type the list numbers of the files, and press ENTER again.

44

5. Enter D. You will see a list of the files you have marked. Enter E
if you would like to edit the list; otherwise enter D again to start
the download process.

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 data communications programs, the PAGE
DOWN key initiates the download.)

8. When the download is complete, press ENTER to return to the
File Menu.

9. To exit the BBS, type G and press ENTER.

Chapter 3 - Service, Warranty and Tech Support

3.4.3 Upgrading the MultiModemISI

The MultiModemISI has a Flash PROM which contains firmware
code for the hardware and DSP code for the digital signal processor
chips. At various times, Multi-Tech may add enhancements and/or
fixes to the firmware. The flash technology used in the
MultiModemISI lets you load these upgrades into the PROM or DSP
chips through the modem's serial port.

3.4.4 Using FlashPro to Upgrade Firmware

1. Download FLASHPRO.ZIP and a new .HEX file from the Multi-

Tech BBS.

2. Unzip the FLASHPRO.ZIP file. Place this unzipped file and the

.HEX file in the same directory.

3. Run FlashPro by typing FLASHPRO, a space, -M and hitting

ENTER at the DOS prompt.

4. Highlight the "

ENTER. Highlight "
Highlight "
which your programming is done. Highlight
select

"ModemFile"

"IRQ Number"

address. Highlight
mind: a) selecting numbers 1-8, chooses ports 1-8 to be
programmed individually; b) selecting number 9, chooses all 8
ports to be programmed at once; c) selecting number 10,
chooses ports 1-4 to be programmed; and d) selecting number
11, chooses ports 5-8 to be programmed. Hit ESC when
finished.

5. Highlight the

MENU. Highlight the .HEX file. Hit ESC when finished.

6. Highlight the

When you are prompted to confirm the file to program, press

Configure

Baud Rate

" option in the MAIN MENU and hit

Active Port

", the rate you choose selects the rate in

" and select

"ISI608 Port Type".

"Device Type"

. Highlight

and select an appropriate MultiModemISI

"ISI Port Number"

"Select File to Program"

"Program Firmware"

"Base Address for Ports"

with the following options in

option in the MAIN

option in the MAIN MENU.

and

and

"Y"

.

45

ISI3334/4 Hardware/Driver Installation Manual

7. To confirm your port(s) are programmed correctly, return to the
MAIN MENU and highlight the

Port Number"

port 7). Return to the MAIN MENU and highlight the

"Communicate with the Port"

able to issue AT commands to that corresponding port.

8. If you need more assistance programming FLASHPRO, contact
our tech support department.

option, note which port is active (e.g., port 1 or

option. At this point, you should be

3.5 About CompuServe/Internet

In addition to the BBS, Multi-Tech provides support through
CompuServe's Modem Vendor Forum (

MULTITECH

operating procedures.
Multi-Tech is a commercial provider on the Internet, and we retrieve

e-mail messages from the following mailboxes on a periodic basis:

. Refer to your CompuServe documentation for special

"Configure"

GOMODEMVEN

option. In the

) under

"ISI

GO

[e-mail]
[e-mail]
[e-mail]
[e-mail]

If you prefer to receive support via the Internet, you can contact
Tech Support via e-mail at:

http://www.multitech.com/_forms/email_tech_support.htm

Multi-Tech's presence includes a Web site at:

http://www.multitech.com

and an ftp site at:

ftp://ftp.multitech.com

Marketing Dept.
Sales Dept.
International Marketing & Sales
Publications Dept.

46

Chapter 3 - Service, Warranty and Tech Support

3.6 About the Multi-Tech Fax-Back Service

Multi-Tech's fax-back system provides 24-hour access to sales,
marketing, and technical literature. Dial 612-717-5888, follow the
voice prompts, and request document number 10 for a catalog of
available documents.

For convenience, have your fax number handy:________________ .
From the catalog of available documents, you can order newsletters,
white papers, press releases, etc. from the sales and marketing
index (pages 1-4), or order basic modem operation and
troubleshooting guides from the technical support and engineering
index. Just enter the applicable FB Doc. # from the left column of
the catalog.

47

ISI3334/4 Hardware/Driver Installation Manual

48

Appendixes

ISI3334/4 Hardware/Driver Installation Manual

Appendix A - Technical Specifications

Your MultiModemISI meets the specifications listed below:

Tradename
Model Numbers

Data Rate (modem)

Data Rates (fax)
Data Format

Compatibility

Error Correction
Data Compression

MultiModemISI
ISI3334/4--multiport four modem card

ISI3334EC--four modem auxiliary module
ISI3334/8--multiport eight modem card

33,600, 31,200, 28,800, 26,400, 24,000,
21,600, 19,200, 16,800, 14,400, 12,000,
9600, 7200, 4800, 2400, 1200, 0-300 bps

14,400, 9600, 7200, 4800, 2400 bps
Serial, binary, asynchronous at 0-300, 1200,

2400, 4800, 7200, 9600, 14,400, 16,800 or
19,200, 21,600, 24,000, 26,400, 28,800,
31,200, 33,600 bps

ITU V.42
V.34 approval, V.34, AT&T V.32
V.32
Group 3 T.4, T.30 and EIA TR-29 Class 2

V.42 (LAP-M or MNP 3 & 4) error correction
V.42

throughput) data compression

bis

, V.42, Pending ITU Enhanced

bis

, V.32, V.22

bis

, (4:1 throughput) or MNP 5 (2:1

bis

, V.22, ITU V.17,

terbo

, ITU

50

Speed Conversion

Flow Control
Options

Mode of Operation

Serial port data rates adjustable to 300,
1200, 2400, 4800, 9600, 19,200, 38,400,
57,600 and 115,200 bps

Xon/Xoff, Hardware RTS/CTS, ENQ/ACK

Full duplex over dial-up lines automatic
dialing and answer

Appendix A - Technical Specifications

Intelligent Features

Command Buffer
Modulation

Fax Modulations

Fully

“AT command”

microprocessor controlled remote
configuration, EIA extended Automode,
adaptive line probing, automatic symbol rate
and carrier frequency during start-up, retrain
and rate renegotiation, autodial, redial,
repeat dial, dial linking, pulse or tone dial,
dial pauses, call status display, auto-parity
and data rate selection, keyboard-controlled
modem options, nonvolatile memory and on­screen displays for modem option
parameters and up to ten telephone
numbers/command lines of up to 60 digits
each, help menus

60 characters
Trellis Coded Modulation (

31,200, 28,800, 26,400, 24,000, 21,600,
19,200, 16,800, 14,400, 12,000 and 9600
bps, Quadrature Amplitude Modulation
(QAM) at 9600 (non-trellis), 4800 and 2400
bps, PSK at 1200 bps, FSK at 300 bps

V.21CH2 FSK at 300 bps
V.27

ter

DPSK at 4800 and 2400 bps
V.29 QAM at 9600 and 7200 bps
V.17 TCM at 14400, 12000, 9600, and 7200
bps

compatible,

TCM

) at 33,600,

Fax Carrier
Frequencies

V.21CH2 (Half Duplex)
1650Hz Mark, 1850Hz Space for Transmit
Originate

1650Hz Mark, 1850Hz Space for Transmit
Answer

V.27

ter

1800Hz Originate/Answer
V.29 QAM 1700Hz Originate/Answer
V.17 TCM 1800Hz Originate/Answer

51

ISI3334/4 Hardware/Driver Installation Manual

Carrier Frequencies

Carrier Frequencies
2400 & 1200 bps
(V.22bis/V.22 or
Bell 212A Standard)

Carrier Frequencies,
300 bps
(Bell Standard)

Transmit Level
Frequency Stability
Receiver Sensitivity

1800 Hz V.32/V.32

Enhanced

24K/21.6K/19.2K/16.8K/14.4K/12K/9.6K/

7.2K/4.8K
Transmit Originate: 1200 Hz

Transmit Answer: 2400 Hz
Receive Originate: 2400 Hz
Receive Answer: 1200 Hz

1270 Hz Mark, 1070 Hz Space for
Transmit Originate
2225 Hz Mark, 2025 Hz Space for Receive
Originate
2225 Hz Mark, 2025 Hz Space for Transmit
Answer
1270 Hz Mark, 1070 Hz Space for Receive
Answer

-10dBm (dial-up)
±0.01%

-43 dBm under worst case conditions

V.34--33.6K/31.2K/28.8K/26.4K/

bis

/V.32

terbo

/V.34/

52

AGC Dynamic
Range

Serial Interface
Bus Type
Base I/O
DIP-Switches

Berg Jumpers
Berg Jumpers

43 dB

EIA RS232C/ITU V.24 Equivalent
IBM PC Standard ISA or EISA
One 16-byte address per card.
I/O address selection (Valid option range

from 100h to 3F0h)
Select 4 or 8 modem option
Select IRQs 2, 3, 4, 5, 7, 10, 11, 12, & 15

Appendix A - Technical Specifications

Connectors

Diagnostics

Operating
Temperature

Power Consumption
Dimensions

Warranty

RJ11C interface per PSTN connection
(eight RJ11Cs per board) and 40-pin and
26-pin connections for attaching auxiliary
module

Utility program that emulates a terminal to
test the connection from PC keyboard to ISI
board to modem to ISI board to PC display

0° to 50° C (32° to 120° F)

1.5 amps @ +5v DC

13.3" x 4.8" x .6"

33.8 cm x 12.2 cm x 1.5 cm
2 Years

53

ISI3334/4 Hardware/Driver Installation Manual

Appendix B - ISI Testing Utilities

This disk contains two files that are to be used in conjunction with ISI
boards. These files are described in two sections: 1) Operation with
factory default settings, and 2) Operation with other than the factory
default settings. These files are:

ISI3334.BIN
3334TERM.EXE

Note: This program is a DOS utility.

1. OPERATION WITH FACTORY DEFAULT SETTINGS

The 3334TERM.EXE program is a utility program that emulates a
terminal to test the connection from PC keyboard to ISI board to
Modem to ISI board to PC display. Prior to executing 3334TERM the
program must be executed to initialize the ISI board (when the ISI
board’s factory settings are unchanged).

The following screen is displayed:

ISI3334 Terminal Utility Version 1.00
Copyright (C), 1990-94 Multi-Tech Systems, Inc
Loading Firmware to ISI3334 located at address 200h
Loading default file: ISI3334.BIN

ISI3334 loading firmware.....

ISI3334 verifying firmware.....Verify OK.

ISI3334 firmware loaded successfully.

ISI firmware loaded successfully...
Enter 1 to 8 for eight ports ISI.
Enter port number ?

54

Note: This program must be run anytime the PC is powered down

or rebooted.

Appendix B - ISI Testing Utilities

The first step in this utility is to identify the port to be tested. In order
for the test to function, the selected port must be connected to an
activated modem. The valid entries for the ISI are 1 through 8.
Once a port is selected, the following is displayed:

Enter 8 = 1200 baud
Enter 11 = 2400 baud
Enter 15 = 9600 baud
Enter 16 = 19200 baud
Enter 17 = 38400 baud
Enter 18 = 57600 baud
Enter 19 = 115200 baud

Enter the baud rate you wish to run ?

This step allows selection of a baud rate for testing. Once a baud
rate is selected, the following is displayed:

ISI Terminal Utility is ready. Press F10 to Exit.

This message indicates that keyboard entry can now be performed;
any characters typed on the keyboard will be sent through the ISI
board to the modem and then returned to be displayed on the PC’s
screen. When operation has been verified the utility can be exited by
pressing the F10 key.

2. OPERATION WITH SETTINGS OTHER THAN FACTORY
DEFAULTS

The 3334TERM.EXE program is a utility program that emulates a
terminal to test the connection from PC keyboard to ISI board to
Modem to ISI board to PC display. Prior to executing 3334TERM,
the program must be executed to initialize the ISI board.

Enter 3334TERM -h <CR> to display the 3334TERM program
requirements. The following screen is displayed:

A:\>3334TERM -h
Usage is:
IsIterm-I<2 to 7, 10 to 12 and 15> for specifying IRQ

level.

-A<address> for specifying base address.

-H this help screen.

Note: This program must be run anytime the PC has been powered
down or rebooted.

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ISI3334/4 Hardware/Driver Installation Manual

Whenever the Base IO Address and/or the IRQ values have been
changed, a parameter string must be added to the command line.
The string takes the form of [-Axxxx], where xxxx represents the new
Base IO Address value and [-Iy], where y represents the IRQ value
selected. Three potential combinations exist for the formatting of the
command line:

1) Changing only the Base IO Address setting the
command line takes the form:

3334TERM [-Axxxx]

2) Changing only the IRQ setting the command line takes
the form:

3334TERM [-Iy]

3) Changing both the Base IO Address and the IRQ settings
the command line takes the form:

3334TERM [-Axxxx] [-Iy]

For example, if the Base IO Address switch setting were changed to
2C0h, then the new command line would be:

56

A:\>3334TERM -A2C0

The following screen is displayed:

A:\>3334TERM -A2C0

Loading Firmware to ISI3334 located at address 2C0h
Loading default file: ISI3334.BIN

ISI3334 loading firmware.....

ISI3334 verifying firmware.....Verify OK.

ISI3334 afirmware loaded successfully.

ISI firmware loaded successfully...
Enter 1 to 8 for Eight ports ISI.
Enter port number ?

Appendix B - ISI Testing Utilities

The first step in this utility is to identify the port to be tested. In order
for the test to function, the selected port must be connected to a
modem that is switched on. The valid entries for the ISI are 1
through 8. Once a port has been selected, the following is
displayed:

Enter 8 = 1200 baud
Enter 11 = 2400 baud
Enter 15 == 9600 baud
Enter 16 == 19200 baud
Enter 17 == 38400 baud
Enter 18 == 57600 baud
Enter 19 == 115200 baud
Enter the baud rate you wish to run?

This step allows selection of a baud rate for testing. Once a baud
rate has been selected, the following is displayed:

ISI Terminal Utility is ready. Press F10 to Exit.

This message indicates that keyboard entry can now be performed;
any characters typed on the keyboard will be sent through the ISI
board to the modem and then returned to be displayed on the PC’s
screen. When operation has been verified, the utility can be exited
by pressing the F10 key).

57

ISI3334/4 Hardware/Driver Installation Manual

Appendix C - Tone Dial Frequencies

Hz Digits

697

770

852

941

Hz 1209 1336 1477 1633

The tone-dialing method combines two frequencies for each of the
twelve digits found on a Touch Tone dial pad. This method is
referred to as Dual-Tone Multi-Frequency (
horizontal rows on a Touch-Tone keypad use the four low
frequencies (697, 770, 852, 941 Hz), while the three vertical columns
use the three high frequencies (1209, 1336, 1477 Hz). The generally
accepted tone frequency tolerance is +0.02%.

For example, the digit 4 would be dialed by combining two tone
frequencies. It would use the frequency 770 Hz from the second row,
and the frequency 1209 Hz from the first column. In another
example, the digit 9 would be dialed with the tone frequencies of 852
Hz and 1477 Hz.

1 2 3 A
4 5 6 B
7 8 9 C

*

0 # D

DTMF

) dialing. The four

58

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 provided are dependent
on the PBX manaufacturer's implementation and feature set.

Appendix D - Regulatory Information

Appendix D - Regulatory Information

Compliance with BABT Requirements

Approved for connection to telecommunications system specified in
the instructions for use subject to the conditions set out in them.

Warning:

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.

It is a condition of approval that the power required by the host and
the total of all adapter cards installed within the host environment,
together with any auxiliary apparatus, does not exceed the power
specification as stated in the Technical Reference Material of the
host apparatus.

The power requirements for the MULTIMODEMISI are:
Modem operating voltages: +12V D.C., -12V D. C., +5V D.C.
Modem Power Consumption: 8 Watts

In order to maintain the independent approval of this card, it is
essential that when other option cards are introduced which use or
generate a hazardous voltage, the minimum creepages and
clearances specified in the following table are maintained. A
hazardous voltage is one which exceeds 42.4V peak a.c or 50V d.c.
If you have any doubt, seek advice from a competent engineer
before installing other adapters into the host equipment.

The equipment must be installed such that with the exception of
connection to the host, clearance and creepage distances shown in
the following table are maintained between the card and any other
assemblies which use or generate a voltage shown in that table.
The larger the distance shown in brackets applies where the local
environment within the host is subject to conductive pollution or dry
nonconductive pollution which could become conductive due to
condensation. Failure to maintain these minimum distances would
invalidate approval.

Interconnection directly, or by way of other apparatus, of

59

ISI3334/4 Hardware/Driver Installation Manual

60

Except at the edge connector which plugs into the host's expansion
slot, clearance distance (Xmm) and creepage distance (Ymm) as
given in the table above, must be maintained between the
communication card and any assemblies which use or generate
hazardous voltage.

This apparatus has been approved for the use of the following
facilities:

• Auto-calling

• Loop disconnect and MF dialing

• Phone number storage and retrieval by a predetermined code

• Operation in the absence of proceed indication

• Automatic storage of last number dialed

• Tone detection-busy

• Auto clear from the originating end

• DTR dialing

• Modem

• PBX timed break register recall

Appendix D - Regulatory Information

European Low Voltage Directive

When correctly installed and maintained, the modem will present no
hazard to the user. When correctly installed the modem will be
connected to the PSTN or a PW and to a Data Terminal Equipment
(DTE), whose modem connections comply with CCITT
recommendation V28. The DTE connections are therefore taken to
be safe voltages (less than ± 30 volts).

Ports which are capable of connecting to other apparatus are
defined as SELV. To ensure conformity with EN41003, ensure that
these ports are only connected to ports of the same type on other
apparatus.

Compliance with BS6305 Clause 6.2, BS6320 Clause

7.2, and BABT/SITS/82/005S/D

a. The modem is suitable for connection to the Public Switched

Telephone Network (PSTN) provided by British
Telecommunications plc or Kingston Communications (Hull) plc.
Circuit supply by British Communications, Mercury
Communication, or Hull City Council. Only direct exchange lines
may be used, not shared service.

b. The modem is suitable for household, office, and similar general

indoor use. It is not suitable for use as an extension to a
payphone.

c. BT lines supplied must support either loop disconnect or

multifrequency tone signalling.

d. REN (Ringer Equivalence Number).

The REN value of a unit is calculated from 3/n where n is the
total number of units which can be connected in parallel which
will still cause the standard bell (as defined in BS6305 Appendix
D) to ring.

REN values of less than 0.3 cannot be assigned.
REN = 1
If a telephone or other device is connected in parallel with the

modem, the combined REN must not exceed 4. A BT supplied
telephone may be assumed to have REN of 1.0 unless
otherwise noted.

61

ISI3334/4 Hardware/Driver Installation Manual

The approval of this modem for connection to the British Telecom
public switched telephone network is INVALIDATED if the apparatus
is subject to any modification in any material way not authorized by
BABT or if it is used with or connected to:

i. internal software that has not been formally accepted BABT.
ii. external control software or external control apparatus which

cause the operation of the modem associated call set-up
equipment to contravene the requirements of the standard set
out in BABT/SITS/82/005S/D.

All other apparatus connected to this modem and thereby connected
directly or indirectly to the British Telecom public switched telephone
network must be approved apparatus as defined in Section 22 of the
British Telecommunications Act 1984.

The Approval Label is as follows:

APPROVED for connection to
telecommunications systems specified
in the instruction for use subject to
conditions set out in them

62

Appendix D - Regulatory Information

Compliance with BS6789: Section 3.1 and Part 2

a. The modem is not capable of allowing Auto Call using '999' or

other PABX emergency numbers.

b. Modes other than modes 1, 2, or 3 should not be used on the BT

PSTN. This modem is a mode 1 device.

c. Users are advised to check the numbers entered during the Auto

Call set up phase prior to dialing.

d. The user should not issue any sequence of commands to the

modem which would cause the modem to exceed the maximum
allowable pause of 8 seconds from the time the modem goes off
hook until dialing begins.

e. For correct operation of the call progress monitor, the power has

to be properly connected and switched on.

Compliance with BS6328 Part 1

a. The modem is not suitable for use on circuits with British

Telecommunications signaling at a normal frequency of 2280
Hz.

b. The modem does not require signaling or otherwise employ the

frequency range dc to 200 Hz.

c. The modem does not require dc from the Private Circuit for

correct operation. The modem may be damaged if connected, in
a private circuit mode, to a circuit supplying dc current (the
maximum permissible direct current is zero amps).

63

ISI3334/4 Hardware/Driver Installation Manual

Modem CE Mark EMC and Safety Compliance

The CE mark is affixed to the enclosed Multi-Tech product to confirm
compliance with the following European Community Directives:

Council Directive 89/336/EEC of 3 May 1989 on the approximation of
laws of Member States relating to electromagnetic compatibility;

and
Council Directive 73/23/EEC of 19 February 1973 on the

harmonization of the laws of Member States relating to electrical
equipment designed for use within certain voltage limits;

both amended by
Council Directive 93/68/EEC of 22 July 1993 on the harmonization of

CE marking requirements.

64

Appendix D - Regulatory Information

Class A Manual Declaration

NOTE: This equipment has been tested and found to comply with
the limits for a Class A digital device, persuant 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 this equipment.

This device complies with Part 15 of the FCC rules. Operation is
subject to the following conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.

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 the cover page of your fax software manual for setup details.

65

ISI3334/4 Hardware/Driver Installation Manual

Index

Symbols

10/11 bit mode selection .................................................................... 16

A

Abort Timer

S7 ...................................................................................................32

About CompuServe ........................................................................... 46

AGC Dynamic Range ........................................................................ 52

A T command set ................................................................................ 21

AT&T "call card" tones .......................................................................13

AT&T's "call card" tones .................................................................... 13

B

Backspace Character ........................................................................31

S5 ...................................................................................................31

British Telecom .................................................................................. 62

British T elecommunications plc .......................................................... 61

Buffer Length of Command Mode ...................................................... 34

S34 ................................................................................................. 34

Bus Type ............................................................................................ 52

Bypass V.32terbo handshaking process ............................................ 25

C

Carrier Detect ....................................................................................14

Carrier Detect Response Time ..........................................................32

S9 ................................................................................................... 32

Carrier Frequencies ........................................................................... 52

Carrier Loss Disconnect Delay Time .................................................32

S10 ................................................................................................. 32

Changing Break Time ........................................................................ 33

S17 ................................................................................................. 33

Clear to Send ..................................................................................... 22

Cleardown on disconnect .................................................................. 14

Command Buffer ................................................................................51

Command mode characters control ................................................... 16

Compatibility ......................................................................................50

Compliance with BS6328 Part 1 ........................................................ 64

66

CompuServe/Internet ........................................................................ 46

Connectors ........................................................................................53

Continuous redial ............................................................................... 12

Creepages and clearances ................................................................ 59

CTS flow control ................................................................................16

CTS follows RTS ............................................................................... 22

D

Data Compression ............................................................................. 50

Data compression enabled/disabled .................................................. 17

Data Format ....................................................................................... 50

Data Rates ......................................................................................... 50

Data Rates (modem) ......................................................................... 50

Data Set Ready ................................................................................. 23

Diagnostics ........................................................................................ 53

Dialing a stored telephone ................................................................. 20

Dimensions ........................................................................................ 53

DIP-Switches ..................................................................................... 52

DSR follows CD ................................................................................. 23

DTR Control ....................................................................................... 15

DTR Dialing ....................................................................................... 15

DTR Dropout Time .............................................................................34

S25 ................................................................................................. 34

Index

E

Enq/Ack pacing .................................................................................. 16

Error Correction ................................................................................. 50

Escape Code Character .................................................................... 30

S2 ................................................................................................... 30

Escape modes selection .................................................................... 17

Extended DTMF characters ............................................................... 58

F

Factory default values ....................................................................... 17

Fax Carrier Frequencies .................................................................... 51

Fax Modulations ................................................................................ 51

Fax-Back Service .............................................................................. 47

Features .............................................................................................. 6

Flash On-Hook .................................................................................. 26

FlashPro to Upgrade Firmware .......................................................... 45

67

ISI3334/4 Hardware/Driver Installation Manual

Flow Control ...................................................................................... 50

Flow control selection ........................................................................16

Frequency Stability ............................................................................52

G

Guard tones ....................................................................................... 18

I

Inactivity Timer ...................................................................................34

S30 ................................................................................................. 34

Intelligent Features ............................................................................51

Interface ............................................................................................. 52

Internet .............................................................................................. 46

K

Kingston Communications (Hull) plc .................................................. 61

L

Lease Line Restoral ........................................................................... 52

Limited Warranty ................................................................................40

Line Feed Character .......................................................................... 31

S4 ................................................................................................... 31

Line Probe ......................................................................................... 16

Lists operating parameters ...............................................................19

Login Password ................................................................................. 29

Long space “break ............................................................................. 26

Loopback Test Enabled ..................................................................... 24

M

Maximum transmit block size selection ............................................. 14

Mode of Operation ............................................................................. 50

Model Number ...................................................................................50

Model Numbers ................................................................................. 50

Modem baud selection ....................................................................... 20

Modem CE Mark EMC and Safety Compliance ................................. 64

Modem Features .................................................................................6

Modem ID ..........................................................................................19

Modulation .........................................................................................51

Multi-Tech command set .................................................................... 21

Multi-Tech responses ......................................................................... 36

68

"Multi-Tech" Result Codes .................................................................36

N

Negotiate V .42 Mode .........................................................................20

Noise Information .............................................................................. 19

Number of Rings Until Modem Answers ............................................ 35

S0 ................................................................................................... 30

O

Off Hook control ................................................................................. 18

Operating T emperature ...................................................................... 53

Operation with Factory Default Settings ............................................54

Operation with Other than Factory Default Settings .......................... 55

P

Pacing ................................................................................................ 17

Password Command Summary ........................................................ 29

Password Commands ...................................................................... 29

Pause during dialing ..........................................................................26

Pause Time for Comma ..................................................................... 32

S8 ................................................................................................... 32

PBX/CBX Disconnect Drop Time for DSR/CTS/CD .......................... 33

S24 ................................................................................................. 33

Power Consumption .......................................................................... 53

Product Description .............................................................................7

Program V34 Connect Speeds .......................................................... 35

Pulse ratio .......................................................................................... 21

Pulse-dial ........................................................................................... 21

Index

R

Read value of Register ......................................................................22

Receiver Sensitivity ...........................................................................52

Recording MultiModemISI Information .............................................. 41

Remote Configuration Escape Character .......................................... 33

S13 ................................................................................................. 33

Remote Configuration Operation Procedures .................................... 28

Remote Digital Loopback ................................................................... 24

Repeat last command ........................................................................ 12

Reset default values ..........................................................................26

Result Codes .............................................................................. 21, 25

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ISI3334/4 Hardware/Driver Installation Manual

Result Codes Terse/Verbose selection ....................................... 24, 25

Return Character ...............................................................................31

S3 ................................................................................................... 31

Return to Command Mode after dialing ............................................. 26

Ringer Equivalence Number .............................................................. 61

Rings Which Have Occurred

S1 ................................................................................................... 30

S

Serial port commands ........................................................................ 23

Set-up Password ...............................................................................29

Sets value of Register ....................................................................... 22

Signal Strength Information ...............................................................19

Signal to Noise Ratio Information ..................................................... 19

Speed Conversion .............................................................................50

Speed conversion .............................................................................. 14

Standard AT command set responses ............................................... 36

"Standard AT" Result Codes .............................................................. 37

T

Tech Support ..................................................................................... 41

Technical Specifications .................................................................... 50

TERSE VERBOSE ............................................................................36

Time Elapse for Escape Sequence ................................................... 34

S32 ................................................................................................. 34

Time for Carrier

S7 ................................................................................................... 32

Time for Carrier (Abort Timer) ............................................................ 32

Tone Dialing: Tone Spacing and Duration .......................................... 33

S11 ................................................................................................. 33

Transmit buffer size ........................................................................... 13

Transmit Level ................................................................................... 52

Trellis Coded Modulation selection .................................................... 24

U

Upgrading the MultiModemISI ........................................................... 45

V

V .32terbo handshaking process ........................................................25

V.34 Line Probe ................................................................................. 15

70

W

Wait for ringback ................................................................................ 27

Wait Time for Dial Tone ...................................................................... 31

S6 ................................................................................................... 31

Warranty ............................................................................................ 40

Windows 95 Autodetect (I9) ...............................................................19

Windows 95 Query ............................................................................ 19

X

Xon/Xoff flow control ......................................................................... 16

Index

71