3Com Corporation, 1996. All rights reserved. No par t of this documentation may be reproduced
in any form or by any means or used to make any derivative work (such as translation,
transformation, or adaptation) without permission from 3Com Corporation.
3Com Corporation reserves the right to revise this documentation and to make changes in
content from time to time without obligation on the part of 3Com Corporation to provide
notification of such revision or change.
3Com Corporation provides this documentation without warranty of any kind, either implied or
expressed, including, but not limited to, the implied warranties of merchantability and fitness for a
particular purpose. 3Com may make improvements or changes in the product(s) and/or the
program(s) described in this documentation at any time.
UNITED STATES GOVERNMENT LEGENDS:
If you are a United States government agency, then this documentation and the software
described herein are provided to you subject to the following restricted rights:
For units of the Department of Defense:
Restricted Rights Legend: Use, duplication or disclosure by the Government is subject to restrictions
as set forth in subparagraph (c) (1) (ii) for restricted Rights in Technical Data and Computer
Software clause at 48 C.F.R. 52.227-7013. 3Com Corporation, 5400 Bayfront Plaza, Santa Clara,
California 95052-8145.
For civilian agencies:
Restricted Rights Legend:Use, reproduction or disclosure is subject to restrictions set forth in
subparagraph (a) through (d) of the Commercial Computer Software - Restricted Rights Clause at
48 C.F.R. 52.227-19 and the limitations set forth in 3Com Corporation’s standard commercial
agreement for the software. Unpublished rights reserved under the copyright laws of the United
States.
The software described in this documentation is furnished under a license agreement included
with the product either as a separate document or on the software distribution diskette in a root
directory file named LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a
copy will be provided to you.
Unless otherwise indicated, registered trademarks are registered in the United States and may or
may not be registered in other countries.
3Com is a registered trademark of 3Com Corporation. 3ComImpact, Async-Sync PPP, SPID Wizard
and QuickSelect are trademarks of 3Com Corporation.
CompuServe is a registered trademark of CompuServe, Inc. IBM and AT are trademarks of
International Business Machines Corporation. Apple and Macintosh are trademarks of Apple
Computer Corporation. UL is a trademark of Underwriters Laboratories, Inc. Pentium is a
trademark of Intel Corporation. Microsoft, MS-DOS, Windows, and Windows NT are trademarks of
Microsoft Corporation. Siemens is a trademark of Siemens Artiengesellschaft. AT&T is a trademark
of American Telephone & Telegraph Company. Northern Telecom is a trademark of Northern
Telecom Limited. Motorola is a trademark of Motorola, Inc. Stac is a trademark of State of the Art
Consulting, Inc. Hayes is a trademark of Hayes Microcomputer Products, Inc. AdTran is a trademark
of AdTran Inc.
Other brand and product names may be registered trademarks or trademarks of their respective
holders.
Guide written by Anne Bailey. Edited by Nancy Kurahashi. Technical illustration by Tim Buckreus.
®
5 Y
L
The warranty for the 3ComImpact™ IQ External ISDN
Modem is as stated in the Limited Warranty statement
found at the back of this User Guide with the
exception that the 3ComImpact IQ External ISDN
modem has a 5 Year limited warranty on the hardware
in lieu of the standard 1 year warranty.
The software for the 3ComImpact IQ External ISDN
Modem has a 90 day warranty as further specified in
the Limited Warranty statement.
To ensure the ver y best 3Com service and support,
take the time to register on-line or complete the
product registration card.
EAR
IMITED
W
ARRANTY
ONTENTS
C
A
BOUT
T
HIS
G
UIDE
Introduction 1
How to Use This Guide 1
Conventions 2
1
NTRODUCTION
I
3C882 ISDN Modem Features 1-2
Easy Installation and Use 1-2
High Performance 1-3
Protocols 1-3
ISDN Standards and Interface 1-3
Security 1-4
Voice Features 1-4
Upgradability 1-4
Diagnostics 1-4
Warranty 1-4
3C882 ISDN Modem Package Contents 1-5
Before You Install the 3C882 ISDN Modem 1-5
IBM PC or Compatible Requirements 1-6
Apple Macintosh Requirements 1-6
ISDN Information 1-7
I
2
NSTALLING
Familiarizing Yourself with the 3C882 ISDN Modem 2-2
Installing a Serial Cable 2-4
Installing the ISDN Cable 2-5
Installing Analog Equipment 2-6
Installing the Power Cable 2-8
3C882 ISDN M
THE
ODEM
3
C
ONFIGURATION
Configuring the 3C882 ISDN Modem for a PC 3-1
Installing the 3C882 Software 3-2
Running SPID Wizard 3-3
Configuring Multilink PPP 3-8
Configuring the B Channel Rate 3-9
Configuring Voice Call Routing 3-9
Verifying the Configuration 3-11
Setup Using Windows 95 3-13
Setup Using Windows NT RAS 3-17
FOR
AN
IBM-C
OMPATIBLE
PC
4
ONFIGURATION
C
C
OMPUTER
Configuring the 3C882 ISDN Modem for a Macintosh Computer 4-1
Placing a 56K TollSaver Call 6-4
Receiving ISDN Data Calls 6-5
Placing Voice Calls Using an Analog Phone Port 6-6
Receiving Voice Calls Using an Analog Phone Port 6-6
AND
Placing Calls Automatically 6-2
Placing Calls Manually 6-2
Placing Multilink PPP Calls 6-3
FOR
AN
ONFIGURATION
C
R
ECEIVING
A
C
PPLE
ALLS
ACINTOSH
M
7
T
ROUBLESHOOTING
Checking the Basics 7-1
Monitoring LEDs 7-2
Monitoring the TEST LED 7-2
Monitoring the D Channel LED 7-2
Monitoring the B Channel LEDs 7-3
Evaluating Symptoms and Solutions 7-3
Using On-Line Help 7-5
Finding More Information 7-5
Contacting Technical Support 7-5
Downloading Firmware to Your 3C882 ISDN Modem 7-5
A
RDERING
O
Placing the ISDN Order Through 3Com A-1
Placing the ISDN Order Through Your Telephone Company A-1
AT&T 5ESS Switch NI1 A-3
AT&T 5ESS Custom Switch A-4
NorthernTelecomDMS 100 Switch A-5
Siemens EWSD Switch A-6
B
AT C
S R
EGISTERS
AT Command Set B-1
S Registers B-4
Result Codes B-8
C
PECIFICATIONS
S
3C882 ISDN Modem Specifications C-1
RS-232 COM Port Pin Specifications C-2
PC Serial Cable Pin Specifications C-3
Macintosh Serial Cable Pin Specifications C-3
C
D
ONFIGURATION
Configuration Using DOS D-1
ISDN S
OMMANDS
,
,
AND
ERVICE
R
U
SING
ESULT
DOS
C
ODES
E
T
ECHNICAL
On-line Technical Services E-1
3Com Bulletin Board Service E-1
World Wide Web Site E-2
3ComForum on CompuServe E-3
3ComFacts Automated Fax Service E-3
Support from Your Network Supplier E-4
Support from 3Com E-4
Returning Products for Repair E-4
S
UPPORT
LOSSARY
G
I
NDEX
L
IMITED
OM
3C
FCC C
C
ANADIAN
W
ND
E
LASS
ARRANTY
SER
U
S
B C
ERTIFICATION
N
OTICE
OFTWARE
ICENSE
L
S
TATEMENT
GREEMENT
A
IGURES
F
1-1Network Access with the 3C882 ISDN Modem 1-1
1-2ISDN Information Sheet 1-7
2-1Installation Steps for the 3C882 ISDN Modem 2-1
2-2Front Panel LED Indicators 2-2
2-3Back Panel Connectors 2-2
2-4Computer to 3C882 ISDN Modem COM Port Connection 2-4
2-5ISDN Cable Connection 2-5
2-6Analog Equipment Connection 2-6
2-7Power Cable Connection 2-8
3-1Main 3C882 Configuration Steps for a PC 3-1
3-2Run Dialog Box 3-2
3-33ComImpact IQ Globe Icon 3-3
3-4SPID Wizard Start Message for PC 3-3
3-5First Telephone Number Dialog Box for PC 3-4
3-6Second Telephone Number Dialog Box for PC 3-5
3-7Successful Configuration Dialog Box 3-5
3-8Configuration Dialog Box for PC 3-6
3-9Voice Call Routing Default Setting 3-9
3-10Configuration for One Telephone Number per Device 3-10
3-11Configuration for One Telephone Number & Two Devices 3-11
3-12New Hardware Dialog Box 3-13
3-13Install From Disk Dialog Box 3-14
3-14Select Device Dialog Box 3-14
3-15Install New Modems Dialog Box 3-15
3-16Modem Manufacturers and Models Dialog Box 3-16
3-17Network Settings Dialog Box 3-18
3-18Remote Access Setup Dialog Box 3-18
4-1Main 3C882 Configuration Steps for a Macintosh 4-1
4-23ComImpact IQ Installer Icon 4-2
4-3Installation Confirmation Message Box 4-2
4-4Software Installation Location Dialog Box 4-3
4-5Successful Installation Message Box 4-3
4-63ComImpact IQ Program Icon 4-4
4-7Select Modem Port Screen 4-4
4-8SPID Wizard Start Screen 4-5
4-9Switch Detection Status Screen for Macintosh 4-6
4-10First Telephone Number Screen for Macintosh 4-6
4-11Second Telephone Screen for Macintosh 4-7
4-12Successful Configuration Screen 4-8
4-13Configuration Dialog Box for Macintosh 4-8
4-14Voice Call Routing Default Setting 4-10
4-15 Configuration for One Telephone Number per Device 4-11
4-16 Configuration for One Telephone Number & Two Devices 4-11
TABLES
1 Text Conventions 2
2 Notice Icons 2
2-1 Front Panel LED Indicator Definitions 2-3
5-1 Changing Default Settings 5-5
7-1 Symptoms, Causes, and Solutions 7-3
A-1 ISDN Order Codes A-2
A-2 Line Configuration for AT&T 5ESS NI1 A-3
A-3 Line Configuration for AT&T 5ESS Custom A-4
A-4 Line Configuration for DMS 100 A-5
A-5 Line Configuration for Siemens EWSD A-6
B-1 AT Command Set Summary B-1
B-2 S Registers B-4
B-3 3C882 ISDN Modem Result Codes B-8
C-1 Pin Descriptions C-2
C-2 PC COM Port Cable Pin Assignments C-3
C-3 Macintosh COM Port Cable Pin Assignments C-3
ABOUT THIS GUIDE
Introduction
This guide describes how to install, operate, and
troubleshoot the 3ComImpact
referred to throughout this guide as the 3C882 ISDN modem.
Be sure to read the README.TXT or readme files on the
applicable software utility diskette for the latest product
information.
How to Use This Guide
The following table shows where to find specific information
in this guide.
If you are looking for:Turn to:
General informationChapter 1
Instructions for installationChapter 2
Instructions for configuration for an IBM or compatible PCChapter 3
Instructions for configuration for a Macintosh computerChapter 4
Advanced configurationChapter 5
Instructions for placing and receiving data and voice callsChapter 6
Troubleshooting tipsChapter 7
Instructions for ordering ISDN serviceAppendix A
Tabular summary of the AT command line set, S registers,
and result codes
3C882 ISDN modem specificationsAppendix C
Instructions for configuration using DOSAppendix D
Information about technical support from 3Com
IQ External ISDN Modem,
Appendix B
Appendix E
Conventions2
Conventions
Table 1 and Table 2 list text and icon conventions that are
used throughout this guide.
Table 1 Text Conventions
ConventionDescription
Text represented as
screen
display
Text represented as
commands
KeysWhen specific keys are referredto in the text, they are called out
ItalicsItalics are used to denote new terms or emphasis.
This typeface is used to represent displays that appear
on your terminal screen, for example:
NetLogin:
This typeface is used to represent commands that you
enter, for example:
SETDefault !0 -IP NETaddr = 0.0.0.0
by their labels, such as “the Return key” or “the Escape key,” or
they may be shown as [Return] or [Esc].
If two or more keys are to be pressed simultaneously, the keys are
linked with a plus sign (+), for example:
Press [Ctrl]+[Alt]+[Del].
Table 2 Notice Icons
IconTypeDescription
Information NoteInformation notes call attention to important features
CautionCautions contain directions that you must follow to
WarningWarnings contain directions that you must follow for
or instructions.
avoid immediate system damage or loss of data.
your personal safety. Follow all instructions carefully.
1
INTRODUCTION
The 3ComImpac t IQ External ISDN Modem (referred to as the
3C882 ISDN modem throughout this guide) is an external,
stand-alone Integrated Services Digital Network (ISDN) Basic
Rate ISDN modem for connection with digital telephone
services from local telephone companies in North America.
One model (3C882) supports both IBM
PCs and Apple
Macintosh computers.
The 3C882 ISDN modem is designed for users who require
high-speed access to the Internet, Intranet, on-line
information services, or corporate local area networks (LAN).
A typical 3C882 ISDN modem application is shown in
Figure 1-1.
or IBM-compatible
3ComImpact IQ
External ISDN Modem
3Com
PWRTEST D B1 B2 SD RD DTR
ISDN line
m
o
C
3
TM
Impact
Public telephone
network
Internet/Intranet
on-line service
Figure 1-1 Network Access with the 3C882 ISDN Modem
or
Corporate
LAN
3C882 ISDN Modem Features1-2
The 3C882 ISDN modem allows transmission of data at
speeds of up to 128 Kbps over digital ISDN connections with
the highest reliability and error-free performance possible.
With Stac
compression and a high-speed serial port, the
3C882 ISDN modem allows you to get transmission speeds of
up to 230.4 Kbps. ISDN technology reduces call setup times
by more than 50% compared to V. fast/V.34 analog modem
setup times; connection is established in 3 seconds.
Setting up the 3C882 ISDN modem takes only 15 minutes.
Simply connect the cables, load the software, run the SPID
Wizard™ and then you are ready to place a call.
The 3C882 ISDN modem quickly processes data and voice
calls simultaneously. For example, you can send a fax or place
a voice telephone call while maintaining a high-speed
connection to the office LAN; you can also send or receive a
voice telephone call while you are connected to the Internet.
The 3C882 ISDN modem can be connected to any
compatible UL
-listed computer that includes
RS-232-compliant serial ports.
3C882 ISDN Modem Features
The 3C882 ISDN modem provides the following features.
Easy Installation and Use
■ SPID Wizard feature for automatic telephone company switch
and service profile ID (SPID) number configuration
■ Single screen, point and click user inter face for configuration
■ Autobaud feature for automatic baud rate detection of your
computer’s COM por t
■ QuickSelect
required protocol, either V.120 or PPP, for each data call
■ Automatic configuration verification with on-line registration
■ On-line Help
protocol detection that automatically senses the
High Performance
■ Stac compression, for data throughput of up to 230.4 Kbps,
which conforms to these IETF drafts: The PPP Compression
Control Protocol, March 1994, and PPP Stacker LZS Compression
Protocol, February 1996
■ An asynchronous RS-232-D data port for connectivity to IBM
or compatible PC and Apple Macintosh serial ports at rates of
up to 230.4 Kbps
■ Multilink PPP (RFC 1717), which creates a single digital
network connection of up to 128 Kbps
■ 56K TollSaver, which places a data call over a voice
connection saving you the additional charge for a data call
Protocols
■ ANSI V.120 rate adaption
■ Async-Sync PPP™ feature, which automatically converts
asynchronous PPP into synchronous (HDLC-based) PPP ISDN
3C882 ISDN Modem Features1-3
■ IETF PPP (RFC 1661)
■ IETF Multilink PPP
■ ISDN Caller ID
ISDN Standards and Interface
■ A complete digital network termination (Basic Rate
ISDN U interface with built in NT1)
■ Full ISDN signaling support of National ISDN
■ Compatible with AT&T, Northern Telecom and Siemens
switches
Security
■ Password Authentication Protocol (PAP) and Challenge
Handshake Authentication Protocol (CHAP) support on both
single-channel and Multilink PPP calls (IETF RFC 1334)
Voice Features
■ Dynamic bandwidth allocation (DBA), which allows you to
place or receive a voice call while a Multilink PPP call is active
■ Two analog voice ports for attaching analog telephone
equipment (touch-tone or cordless telephones, fax and
answering machines, and analog modems) to the ISDN line
■ Flexible call routing to the two analog ports
Upgradability
■ Flash memory for field firmware updates
■ Firmware posted on 3Com’s ftp and BBS sites
3C882 ISDN Modem Features1-4
Diagnostics
■ LED status display
■ Test call compatibility
Warranty
■ 5-year limited warranty
3C882 ISDN Modem Package Contents1-5
3C882 ISDN Modem Package Contents
The 3C882 ISDN modem package contents contains one
each:
■ 3ComImpact IQ External ISDN Modem
■ Power cable with an AC wall transformer
■ RJ-45/RJ-11 ISDN telephone cable
■ 3.5-inch installation diskette for PCs running Windows® 95,
Windows NT®, Windows 3.x, or DOS
■ 3.5-inch installation diskette for Macintosh computers
■ 3ComImpact IQ External ISDN Modem User Guide
■ 3Com Impact IQ External ISDN Modem Quick Start Instructions
Before You Install the 3C882 ISDN Modem
To install and use the 3C882 ISDN modem successfully, you
must have the following:
■ Correct ISDN service installed at your location with an
available ISDN RJ-11 outlet. If you have not ordered ISDN
service yet, see Appendix A.
■ ISDN configuration information. Fill out the ISDN Information
Sheet in the “ISDN Information” section of this chapter.
■ A computer that meets UL standards in the United States or
is certified to CSA standards in Canada. Refer to the section
“IBM PC or Compatible Requirements” for an IBM or
IBM-compatible PC. Refer to the section “Apple Macintosh
Requirements” for an Apple Macintosh computer.
■ For Macintosh users, one 25-pin male to mini DIN 8-pin male
serial cable.
To order a free Macintosh serial cable, refer to the information
enclosed in your 3C882 ISDN modem package. If you are
supplying your own serial cable, ensure that it meets the pin
specifications provided in Appendix C.
Before You Install the 3C882 ISDN Modem1-6
IBM PC or Compatible Requirements
An IBM-compatible PC must have the following:
■ A 386, 486, or Pentium
■ Microsoft Windows 95, Windows NT, or Windows 3.x,
MS-DOS
■ 640 KB of conventional memory
■ A hard disk drive with 2 MB of free space
■ A high-density 3.5-inch floppy diskette drive
■ VGA or compatible video graphics adapter and monitor
, or IBM PC DOS 3.x
processor
(color recommended)
■ An available serial communications port
For 230.4 Kbps data rate. You will need an enhanced serial
port card and COM port driver software which support 230.4
Kbps.
For 115.2 Kbps data rate. 3Com recommends that
your IBM or IBM-compatible PC serial COM port be
equipped with a 16C550 UART (universal asynchronous
receiver/transmitter). To determine what UART is installed in
your PC, run the Microsoft
Diagnostic Program (msd) from
the DOS prompt.
Apple Macintosh Requirements
An Apple Macintosh computer must have the following:
■ An available serial communications port
■ System 7 or later operating system
■ A hard disk drive with 2 MB of free space
■ A high-density 3.5-inch floppy diskette drive
ISDN Information
Enter your ISDN telephone number(s) in the information
sheet shown in Figure 1-2. You will need this information
during configuration of the 3C882 ISDN modem.
Although the 3C882 ISDN modem automatically configures
the ISDN switch type and Service Profile Identifier (SPID)
number(s), you should indicate the switch type and SPID(s), if
any were assigned. You may need to refer to this information
for technical support.
If necessary, ask your telephone company ISDN representative
for the ISDN information.
Number of Telephone Numbers (1 or 2) ______
Phone #1______________________________
SPID # for Phone #1______________________
Phone #2______________________________
SPID # for Phone #2______________________
Figure 1-2 ISDN Information Sheet
Before You Install the 3C882 ISDN Modem1-8
ISDN Switch Type. Place a check mark next to the ISDN
switch your telephone company uses. Each switch type has
a corresponding provisioning table in Appendix A.
Number of ISDN Telephone Numbers. Your one ISDN
telephone line can support two ISDN telephone numbers. If
you ordered one ISDN telephone number, write 1. If you
ordered two ISDN telephone numbers, write 2.
ISDN Telephone Number 1. Write down your ISDN telephone
number provided to you by the telephone company ISDN
representative.
ISDN Telephone Number 2. Write the second ISDN phone
number if you ordered two ISDN telephone numbers for your
line.
SPID Number. If required by your telephone company, fill in
the SPID number for each ISDN phone number. Your
telephone company can tell you whether a SPID is required.
This number is supplied to you by the telephone company.
2
INSTALLINGTHE 3C882
ISDN MODEM
This chapter describes how to install the 3C882 ISDN modem
for use with an IBM or IBM-compatible PC or an Apple
Macintosh computer.
This installation procedure assumes that you are familiar with
your Apple Macintosh or IBM-compatible computer. If you
are not, refer to the user guide that accompanied your
computer for instructions on hardware installation and
operating system commands.
The main hardware installation steps are depicted in
Figure 2-1.
Familiarize yourself
with the
3C882 ISDN modem
Install serial cable
Install ISDN cable
Install analog
equipment
(optional)
Install power cable
Figure 2-1 Installation Steps for the 3C882 ISDN Modem
Familiarizing Yourself with the 3C882 ISDN Modem2-2
Familiarizing Yourself with the 3C882 ISDN Modem
You should familiarize yourself with the components of the
front panel and back panel of the 3C882 ISDN modem prior
to installation.
The LED status display, shown in Figure 2-2, consists of eight
front panel LEDs that are described in Table 2-1.
PWR TEST DB1B2SDRDDTR
Figure 2-2 Front Panel LED Indicators
Figure 2-3 shows the back panel.
9 VDC
.6A MAX
Figure 2-3 Back Panel Connectors
RESET
12
3Com
Impact IQ
TM
RS-232ISDN U
3 Com
Familiarizing Yourself with the 3C882 ISDN Modem2-3
Table 2-1 Front Panel LED Indicator Definitions
LEDColorDescription
PWRGreenPower Indicator. Lit when power is on and remains lit as long
TESTGreenSelf-Test/Status. Flashes when the 3C882 ISDN modem is
DGreenD Channel Status. Indicates the ISDN physical network
B1Amber
or
green
B2Amber
or
green
as power is supplied to the unit.
executing its power-up self-test or a user-initiated reset. If the
results of the self-test or reset are normal, the LED goes off. If
the result of the self-test is abnormal and a fault is detected,
the LED remains lit but does not flash.
interface and D channel status:
Goes off once the physical and D channel signaling are
synchronized.
Flashes if the physical interface establishes synchronization
and the ISDN D channel signaling procedures are not properly
established.
Remains lit if the physical ISDN interface is not synchronized or
is disconnected.
B1 Channel Activity. Green indicates a circuit-switched data
call in progress. Amber indicates a circuit-switched voice call in
progress. If a call is in a dialing state, the LED flashes. When the
call is disconnected, the LED goes off.
B2 Channel Activity. Green indicates a circuit-switched data
call in progress. Amber indicates a circuit-switched voice call in
progress. If a call is in a dialing state, the LED flashes. When the
call is disconnected, the LED goes off.
SDGreenSend Data. Indicates that information is being transmitted
RDGreenReceive Data. Indicates that information is being transmitted
DTRGreenData Terminal Ready. Indicates that communication
over the serial data port from the computer to the ISDN
modem.
over the serial data port to the computer from the ISDN
modem.
between the ISDN modem and computer has been
established.
Installing a Serial Cable
You will need the following type of serial cable.
■ For a Macintosh computer, you will need a 25-pin male to
mini DIN 8-pin male serial cable. Refer to the information
enclosed in your 3C882 ISDN modem package to order a free
cable. If you are providing your own serial cable, ensure that
it meets the pin specifications provided in Appendix C.
■ For a PC, you will need the 25-pin male to 9-pin female serial
cable that was provided. For PCs with a 25-pin serial port
connector, you will need to purchase a standard 9-pin to
25-pin adapter.
To install the 3C882 ISDN modem serial cable:
1 Insert the 25-pin male end of a serial signal cable into the
RS-232 serial port on the 3C882 ISDN modem’s back
panel and tighten the connector screws, as shown in
Figure 2-4.
Installing a Serial Cable2-4
ISDN U
RS-232
12
RESET
9 VDC
.5A MAX
Figure 2-4 Computer to 3C882 ISDN Modem COM Port Connection
2 Connect the other end of a serial cable to a serial COM
port on the back of your computer and tighten the
connector screws.
On a PC, most COM port connectors are labeled COM,
SERIAL, or RS-232-D. On an IBM AT® PC and most laptops or
notebooks, connect the cable to a 9-pin COM port connector.
If your PC has a 25-pin serial port connector, you will need to
install a standard 9-pin to 25-pin adapter.
On a Macintosh computer, the COM port is the mini DIN
8-pin serial connector depicted by the telephone handset.
Installing the ISDN Cable
To install the ISDN cable:
1 Connect the RJ-45 (8-pin) connector end of the
RJ-45/RJ-11 ISDN cable to the RJ-45 ISDN line port labeled
ISDN U on the 3C882 ISDN modem’s back panel, as shown
in Figure 2-5.
Installing the ISDN Cable2-5
ISDN U
RS-232
12
RESET
9 VDC
. 5A MAX
Figure 2-5 ISDN Cable Connection
2 Connect the RJ-11 (6-pin) connector end of the
RJ-45/RJ-11 ISDN cable to the RJ-11 ISDN wall jack.
CAUTION:
An NT1 is built into the 3C882 ISDN modem.
Never connect the 3C882 ISDN modem ISDN port to a
standard analog telephone jack or to an external NT1
device. Make sure that it is connected directly to the ISDN
jack.
Installing Analog Equipment
You can connect an analog touch-tone telephone,
answering machine, fax machine, or external analog modem
to the 3C882 ISDN modem.
You will need an RJ-11 to RJ-11 cable for each analog phone
port connection.
To install an analog device:
1 Insert one RJ-11 connector to a phone port labeled with a
telephone icon on the back of the ISDN modem as shown
in Figure 2-6.
Installing Analog Equipment2-6
ISDN U
RS-232
12
RESET
9 VDC
.5A MAX
Figure 2-6 Analog Equipment Connection
2 Insert the other RJ-11 end into the appropriate RJ-11 port
on the analog device.
3 If you have another analog device to install, repeat steps 1
and 2.
Installing Analog Equipment2-7
CAUTION: The 3C882 ISDN modem is designed to operate with
®
telephones that are compatible with the original AT&T
2500
touch-tone telephone standard. 3Com guarantees proper
operation of up to three compatible touch-tone devices per
analog phone port. The 3C882 ISDN modem is designed to
provide power and ringing for these three devices on up to 200
feet of AWG 26 or heavier AWG wiring. Although the 3C882
ISDN modem may function satisfactorily at longer cable
distances with more than two attached telephones, proper
operation at longer cable distances is not guaranteed in all
situations.
Specialized telephone equipment such as speaker phones
that draw large amounts of power may not work on the
3C882 ISDN modem’s Phone port. Because these devices do
not conform to the power specification of the 2500
touch-tone telephone standard, their operation is not
guaranteed.
Installing the Power Cable
To install the power cable:
1 Connect the 3C882 ISDN modem power cable to the
9 VDC power connector on the back panel of the ISDN
modem, as shown in Figure 2-7.
12
RESET
9 VDC
.5A MAX
Installing the Power Cable2-8
ISDN U
RS-232
Figure 2-7 Power Cable Connection
2 Plug the transformer end of the power cable into a surge-
protected standard 110 VAC wall outlet.
The indicator LEDs on the front panel (see Figure 2-2) flash
momentarily as the unit undergoes a power-up self-test
diagnostic.
This completes the 3C882 ISDN modem installation.
Go to the appropriate chapter to configure the 3C882 ISDN
modem, either Chapter 3, “Configuration for an
IBM-Compatible PC,”or Chapter 4, “Configuration for an Apple
Macintosh Computer.”
3
CONFIGURATIONFORAN
IBM-COMPATIBLE PC
This chapter describes how to configure the 3C882 ISDN
modem using the Windows operating system. Additional
steps are required for Windows 95 and Windows NT users.
The main topics are as follows:
■ Configuring the 3C882 ISDN modem
■ Setup Using Windows 95
■ Setup Using Windows NT RAS
For instructions on using the DOS operating system, refer to
Appendix D.
Configuring the 3C882 ISDN Modem for a PC
The main steps are shown in Figure 3-1.
Install 3C882
software
Run
SPID Wizard
Configure
Multilink PPP,
B channel rate, &
voice call routing
Verify
configuration
Figure 3-1 Main 3C882 Configuration Steps for a PC
Configuring the 3C882 ISDN Modem for a PC3-2
Installing the 3C882 Software
To install the 3C882 ISDN modem software:
1 Insert the 3ComImpact IQ Windows & DOS Installation
Diagnostic Utilities diskette into an available floppy drive.
2 If you are using Windows 95, selec t Run from the Start
menu. If you are using Windows 3.x, select Run from the File
menu. In the Run dialog box shown in Figure 3-2, t ype:
a:\setup
Figure 3-2 Run Dialog Box
3 Click OK.
After the configuration program is copied to the hard disk.,
the readme file opens. Review the information and then
close the file. A message confirms installation is complete.
If you are running Windows 3.x, a message box appears and
asks you whether you want to install a COM port
enhancement driver for data transfer rates up to 115.2 Kbps.
This driver will replace your existing COM por t driver.
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