3COM ISDN Modem User Manual

OMIMPACT

XTERNAL

ISDN M



ODEM

SER

UIDE

Part No. 09-0885-001 Published July 1997

3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8145



3Com Corporation, 1997. All rights reserved. No part 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:

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 Unpublished rights reserved under the copyright laws of the United States.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 is a trademark 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. LZS is a trademark of hi/fn, 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 Eric Heller.

Use, duplication or disclosure by the Government is subject to restrictions

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 very best 3Com service and support, take the time to register on-line or complete the product registration card.

EAR

IMITED

ARRANTY

ONTENTS

BOUT THIS GUIDE

Introduction 1 How to Use This Guide 1 Conventions 2

NTRODUCTION

3C882 ISDN Modem Features 1-2 3C882 ISDN Modem Package Contents 1-4 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

NSTALLING THE

Familiarizing Yourself with the 3C882 ISDN Modem 2-2 Installing a Serial Cable 2-3 Installing the ISDN Cable 2-5 Installing Analog Equipment 2-5 Installing the Power Cable 2-7

3C882 ISDN M

ODEM

ONFIGURATION FOR AN

Conﬁguring the 3C882 ISDN Modem for a PC 3-1

Installing the 3C882 Software 3-2 Running the SPID Wizard 3-3

Running the SPID Wizard Again 3-8 Conﬁguring Multilink PPP 3-9 Conﬁguring the B Channel Rate 3-10 Conﬁguring Voice Call Routing 3-10 Verifying the Conﬁguration 3-13

Setup Using Windows 95 3-15 Setup Using Windows NT 3.5.1 RAS 3-17 Setup for Windows NT 4.0 3-20

IBM-C

OMPATIBLE

Conﬁgure Dial-Up Networking 3-23

Dial Up Networking for Windows 95 3-23

To conﬁgure Dial-Up Networking manually: 3-23 Running the Internet Set-Up Wizard 3-24

Dial-up Networking for Windows NT 4.0 3-26

Setup for 230Kbps 3-30

Setting up 230K for Windows NT 3.5.1 3-30 Setting up 230K for Windows 95 and Windows NT 4.0 3-31

ONFIGURATION FOR AN APPLE MACINTOSH

OMPUTER

Conﬁguring the 3C882 ISDN Modem for a Macintosh Computer 4-1

Installing the 3C882 Software 4-2 Running the SPID Wizard 4-3 Conﬁguring Multilink PPP 4-7 Conﬁguring the B Channel Rate 4-8 Conﬁguring Voice Call Routing 4-9

Two Telephone Numbers and Two Analog Devices 4-10

Verifying the Conﬁguration 4-11

Conﬁguring Internet Access for a

Set Up Using OT/PPP and Open Transport 4-12 Set Up Using FreePPP with Open Transport 4-16

Macintosh Computer 4-12

DVANCED CONFIGURATION

Advanced Conﬁguration Parameter Default Values 5-1 Changing the Parameter Settings 5-4

UPPLEMENTARY VOICE FEATURES

Supplementary Voice Features 6-1

Call Forwarding 6-1 ISDN Call Waiting 6-2 Call Conference 6-3 Call Drop 6-4 Call Transfer 6-4 ISDN Service from Paciﬁc Bell 6-5

LACING AND RECEIVING CALLS

Placing ISDN Data Calls 7-1

Placing Calls Automatically 7-2 Placing Calls Manually 7-2 Placing Multilink PPP Calls 7-3 Placing a TollMizer Call 7-4

Receiving ISDN Data Calls 7-5 Placing Voice Calls Using an Analog Phone Port 7-6 Receiving Voice Calls Using an Analog Phone Port 7-6 ISDN Call Logging 7-7

ROUBLESHOOTING

Checking the Basics 8-2 Monitoring LEDs 8-2

Monitoring the TEST LED 8-2 Monitoring the D Channel LED 8-3 Monitoring the B Channel LEDs 8-3 Monitoring the SD LED 8-3 Monitoring the RD LED 8-3 Monitoring the DTR LED 8-4

Evaluating Symptoms and Solutions 8-4 Microkey Error Codes 8-8 Restoring the 3C882 ISDN Modem to Autobaud 8-9 Using On-Line Help 8-10 Finding More Information 8-10 Downloading Firmware to Your 3C882 ISDN Modem 8-10

RDERING

Placing the ISDN Order Through 3Com A-1 Placing the ISDN Order Through Your Telephone Company A-1 What Do I Need To Support Supplementary Voice Features? A-3 ISDN Line Parameter Tables A-4

AT&T 5ESS Switch NI1 A-5 AT&T 5ESS Custom Switch A-6 NorthernTelecomDMS 100 Switch A-7 Siemens EWSD Switch A-8

ISDN S

ERVICE

OMMANDS

AT C

AT Command Set B-1 S Registers B-4 Result Codes B-9

PECIFICATIONS

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

EGISTERS, AND RESULT CODES

, S R

ONFIGURATION USING

Conﬁguration Using DOS D-1

LOSSARY

NDEX

IMITED WARRANTY

3COM END U

FCC C

LASS

ANADIAN NOTICE

DOS

SER SOFTWARE LICENSE AGREEMENT

ERTIFICATION STATEMENT

B C

IGURES

1-1

Network Access with the 3C882 ISDN Modem 1-1

1-2

ISDN Information Sheet 1-7

2-1

Installation Steps for the 3C882 ISDN Modem 2-1

2-2

Front Panel LED Indicators 2-2

2-3

Back Panel Connectors 2-2

2-4

Computer to 3C882 ISDN Modem COM Port Connection 2-4

2-5

ISDN Cable Connection 2-5

2-6

Analog Equipment Connection 2-6

2-7

Power Cable Connection 2-7

3-1

Main Conﬁguration Steps for a PC 3-1

3-2

Run Dialog Box 3-2

3-3

Welcome Screen for PC 3-2

3-4

3ComImpact IQ Globe Icon 3-4

3-5

SPID Wizard Start Message for PC 3-4

3-6

First Telephone Number Dialog Box for PC 3-5

3-7

Second Telephone Number Dialog Box for PC 3-6

3-8

Successful Conﬁguration Dialog Box 3-6

3-9

Conﬁguration Dialog Box for PC 3-7

3-10

Voice Call Routing Default Setting 3-11

3-11

Conﬁguration for One Telephone Number and Two Devices 3-12

3-12

Conﬁguration for Two Telephone Numbers and Two Analog Devices 3-12

3-13

New Hardware Dialog Box 3-15

3-14

Install From Disk Dialog Box 3-16

3-15

Select Device Dialog Box 3-16

3-16

Network Settings Dialog Box 3-18

3-17

Remote Access Setup Dialog Box 3-19

3-18

Install New Modems Dialog Box 3-21

3-19

Modem Manufacturers and Models Dialog Box 3-22

3-20

New Phonebook Entry Wizard 3-27

3-21

Phonebook Entry Screen 3-28

3-22

Server Type Screen 3-28

4-1

3C882 Conﬁguration Steps for a Macintosh 4-1

4-2

Installation Message Box 4-2

4-3

Successful Installation Message Box 4-3

4-4

3ComImpact IQ Program Icon 4-3

4-5

Select Modem Port Screen 4-4

4-6

SPID Wizard Start Screen 4-4

4-7

First Telephone Number Screen for Macintosh 4-5

4-8

Second Telephone Screen for Macintosh 4-6

4-9

Conﬁguration Dialog Box for Macintosh 4-7

4-10

Voice Call Routing Default Setting 4-9

4-11

Conﬁguration for One Telephone Number and Two Devices 4-10

4-12

Conﬁguration to ring both ports simultaneously 4-11

4-13

PPP Control Panel 4-13

4-14 OT/PPP Modem Control Panel 4-14 4-15 TCP/IP Control Panel 4-15 4-16 FreePPP Setup Screen 4-16 4-17 FreePPP Account Screen 4-17 4-18 FreePPP Connection Screen 4-18 4-19 FreePPP Modem Setup Screen 4-18 4-20 FreePPP TCP/IP Control Panel 4-20

TABLES

1 Text Conventions 2 2 Notice Icons 2

2-1 Front Panel LED Indicator Deﬁnitions 2-2

5-1 Changing Default Settings 5-5

6-1 How to Use Call Waiting 6-2 6-2 How to Use Call Conference 6-3 6-3 How to Use Call Transfer 6-4

8-1 Symptoms, Causes, and Solutions 8-4 8-2 Microkey Error Codes and Their Meaning 8-8

A-1 Supporting Supplementary Voice Features A-4 A-2 Line Conﬁguration for AT&T 5ESS NI1 A-5 A-3 Line Conﬁguration for AT&T 5ESS Custom A-6 A-4 Line Conﬁguration for DMS 100 A-7 A-5 Line Conﬁguration for Siemens EWSD A-8

B-1 AT Command Set Summary B-1 B-2 S Registers B-4 B-3 3C882 ISDN Modem Result Codes B-9

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 information Chapter 1

Instructions for installation Chapter 2

Instructions for configuration for an IBM or compatible PC Chapter 3

Instructions for configuration for a Macintosh computer Chapter 4

Advanced configuration Chapter 5

Information on supplementary voice features Chapter 6

Instructions for placing and receiving data and voice calls Chapter 7

Troubleshooting tips Chapter 8

Instructions for ordering ISDN service Appendix A

Tabular summary of the AT command line set, S registers, and result codes

3C882 ISDN modem specifications Appendix C

Instructions for configuration using DOS Appendix D



IQ External ISDN Modem,

Appendix B

2 ABOUT THIS GUIDE

Conventions

Table 1 and Table 2 list text and icon conventions that are used throughout this guide.

Table 1 Text Conventions

Convention Description

Text represented as

screen display

Text represented as

commands

Keys When specific keys are referred to in the text, they are called out

Italics Italics 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

Icon Type Description

Information Note Information notes call attention to important features

Caution Cautions contain directions that you must follow to

Warning Warnings contain directions that you must follow for

or instructions.

avoid immediate system damage or loss of data.

your personal safety. Follow all instructions carefully.

INTRODUCTION

The 3ComImpact 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

Impact

3Com

TESTD B1 B2 SD RD DTR R PW

ISDN line

3 Com

Public telephone

network

Internet/intranet

on-line service

Corporate

LAN

Figure 1-1 Network Access with the 3C882 ISDN Modem

The 3C882 ISDN modem allows transmission of data at speeds of up to 128 Kbps over digital ISDN connections with

1-2 CHAPTER 1: INTRODUCTION

the highest reliability and error-free performance possible. With hi/fn



compression and a high-speed serial port, the 3C882 ISDN modem allows you to reach 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 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



RS-232-compliant serial ports.

-listed computer that includes

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 interface for conﬁguration

■ Autobaud feature for automatic baud rate detection of your

computer’s COM port

■ 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

■ hi/fn, version 5, compression, for data throughput of up to

230.4 Kbps, which conforms to these IETF RFC’s: The PPP Compression Control Protocol (1962), and PPP LZS Compression Protocol (1974)

■ 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 1990), which creates a single digital

network connection of up to 128 Kbps

■ TollMizer, which places a data call over a voice connection,

saving you the additional charge for a data call

■ Support for Shiva’s Proprietary PPP Password Authentication

Protocol (SPAP), versions 2 and 3

Protocols

■ ANSI V.120 rate adaption

3C882 ISDN Modem Features 1-3

■ Async-Sync PPP™ feature, which automatically converts

asynchronous PPP into synchronous (HDLC-based) PPP ISDN

■ IETF PPP (RFC 1661)

■ IETF Multilink PPP

■ ISDN Call Logging

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

1-4 CHAPTER 1: INTRODUCTION

Security

■ Password Authentication Protocol (PAP) and Challenge

Handshake Authentication Protocol (CHAP) support on both single-channel and Multilink PPP calls (IETF RFC 1994)

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

Diagnostics

■ LED status display

■ Test call compatibility

Warranty

■ 5-year limited warranty

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

■ 25-pin male to 9-pin female serial cable

Before You Install the 3C882 ISDN Modem 1-5

■ 3.5-inch installation diskettes for PCs running Windows® 95,

Windows NT®, or Windows 3.x

■ 3.5-inch installation diskette for PCs running DOS

■ 3.5-inch installation diskette for Macintosh computers

■ 3ComImpact IQ External ISDN Modem User Guide

■ 3ComImpact IQ External ISDN Modem Quick Start

Instructions

■ RS232 Serial Port Cable

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. Complete 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.

1-6 CHAPTER 1: INTRODUCTION

IBM PC or Compatible Requirements

An IBM-compatible PC must have the following:

■ A 386, 486, or Pentium

■ Microsoft

MS-DOS

■ 640 KB of conventional memory

■ A hard disk drive with 4 MB of free space

■ A high-density 3.5-inch ﬂoppy diskette drive

■ VGA or compatible video graphics adapter and monitor



Windows 95, Windows NT, or Windows 3.x,



, or IBM PC DOS 3.x or higher



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 that 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 4 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.

Before You Install the 3C882 ISDN Modem 1-7

ISDN Information Sheet

3ComImpact IQ ISDN Modem

ISDN Switch Type

AT&T 5ESS NI1 ❒ AT&T 5ESS Custom ❒ Northern Telecom DMS 100 ❒

Siemens EWSD

❒

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

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

1-8 CHAPTER 1: INTRODUCTION

you ordered one ISDN telephone number, write 1. If you ordered two ISDN telephone numbers, write 2.

Ordering two ISDN telephone numbers allows you to conduct two simultaneous calls on both analog phone ports.

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 and supply you with the correct value.

INSTALLING THE 3C882

ISDN MODEM

This chapter describes installation of 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

Connect serial cable

Install ISDN cable

Install analog

equipment

(optional)

Install power cable

Figure 2-1 Installation Steps for the 3C882 ISDN Modem

2-2 CHAPTER 2: INSTALLING THE 3C882 ISDN MODEM

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 D B1 B2 SD RD DTR

3Com

Impact IQ

3 Com

Figure 2-2 Front Panel LED Indicators

Figure 2-3 shows the back panel.

9 VDC

.6A MAX

Figure 2-3 Back Panel Connectors

Table 2-1 Front Panel LED Indicator Deﬁnitions

LED Color Description

PWR Green Power Indicator. Lit when power is on and remains lit as long

TEST Green Self-Test/Status. Flashes when the 3C882 ISDN modem is

RESET

RS-232 ISDN U

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.

Installing a Serial Cable 2-3

LED Color Description

D Green D Channel Status. Indicates the ISDN physical network

B1 Amber

or green

B2 Amber

or green

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.

SD Green Send Data. Indicates that information is being transmitted

RD Green Receive Data. Indicates that information is being transmitted

DTR Green Data Terminal Ready. Indicates that communication between

over the serial data port from the computer to the ISDN modem.

over the serial data port to the computer from the ISDN modem.

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.

2-4 CHAPTER 2: INSTALLING THE 3C882 ISDN MODEM

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.

ISDN U

RS-232

RESET

9 VDC

.5A MAX

Figure 2-4 Computer to 3C882 ISDN Modem COM Port Connection

2 Connect the other end of the 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.

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.

RS-232

Installing the ISDN Cable 2-5

ISDN U

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:

2-6 CHAPTER 2: INSTALLING THE 3C882 ISDN MODEM

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.

ISDN U

RS-232

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.

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 compatible touch-tone devices that do not exceed a total ringer equivalency number (REN) of three per analog 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.

Installing the Power Cable 2-7

ISDN U

RS-232

RESET

9 VDC

.5A MAX

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.

2-8 CHAPTER 2: INSTALLING THE 3C882 ISDN MODEM

This completes the 3C882 ISDN modem installation.

Refer to the appropriate chapter to conﬁgure the 3C882 ISDN modem; either Chapter 3, “Conﬁguration for an IBM-Compatible PC Running Windows,”or Chapter 4, “Conﬁguration for an Apple Macintosh Computer.”

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