3COM ISDN Modem User Manual

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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 Unpublished rights reserved under the copyright laws of the United States.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.”

CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

This chapter describes the 3C882 ISDN modem conﬁguration for use with the Windows operating system. Main topics are as follows:

■ Conﬁguring the 3C882 ISDN modem

■ Setup using Windows 95

■ Setup using Windows NT 3.5.1

■ Setup using Windows NT 4.0

■ Conﬁguring Dial-Up Networking

■ Setup for 230Kbps

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 Conﬁguration Steps for a PC

3-2 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

Installing the 3C882 Software

To install the 3C882 ISDN modem software:

1 Insert the 3ComImpact IQ Windows Installation Diagnostic

Utilities diskette into an available ﬂoppy drive.

2 If you are using Windows 95, select 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, type:

a:\setup

Figure 3-2 Run Dialog Box

3 Click OK.

After the conﬁguration program is copied to the hard disk, a welcome screen opens, as shown in ﬁgure Figure 3-3.

Figure 3-3 Welcome Screen for PC

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

4 Click Next to continue the installation.

You will then be prompted to choose the directory in which to install the software.

5 If you would like to designate a directory other than the

default directory, click Browse to do so. Otherwise, click Next to install the 3ComImpact IQ into the default directory.

If you are running Windows 3.x, a message box appears and asks you whether you want to install a Microkey COM port enhancement driver for data transfer rates up to 115.2 Kbps. This driver will replace your existing COM port driver. If you receive the following message during the Microkey installation procedure:

ERROR DURING INSTALLATION, ERROR CODE

please record the error code (shown as XX above) and refer to “” on page 8-7 for an explanation of the error code and the corrective action to take.

After the setup program has completed installation, you are asked to view the Readme ﬁle.

6 Click Ye s to review this ﬁle.

You may choose File and Print to create a hardcopy of the Readme. Otherwise, read the ﬁle and exit. A message box conﬁrms that the installation is complete.

7 Click OK to complete the installation.

Running the SPID Wizard

The SPID Wizard automatically detects your telephone company’s switch type and conﬁgures the SPID(s).

You will need the ISDN telephone numbers from the ISDN Information Sheet you completed in Chapter 1.

3-4 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

1 Double-click the 3ComImpact IQ icon shown in Figure 3-4.

Figure 3-4 3ComImpact IQ Globe Icon

You will see a start message, as shown in Figure 3-5.

Figure 3-5 SPID Wizard Start Message for PC

If you do not want to run the SPID Wizard, click Cancel to conﬁgure your values manually via the conﬁguration dialog box (see Figure 3-9). Here you can select your ISDN switch type, enter the telephone number(s) and, if required, enter the corresponding SPID(s) for your ISDN line. Note that running the SPID Wizard is the recommended method for conﬁguring your SPID values.

The SPID Wizard ﬁrst checks for ISDN layer 1status, and then conﬁgures the switch type.

Configuring the 3C882 ISDN Modem for a PC 3-5

After the switch type is conﬁgured, the dialog box for the ﬁrst telephone number appears, as shown in Figure 3-6.

Figure 3-6 First Telephone Number Dialog Box for PC

2 Enter the ﬁrst telephone number for your ISDN line.

3 Click Next.

A message appears, indicating that the 3C882 ISDN modem is detecting the SPID for the ﬁrst telephone number.

3-6 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

After the SPID is conﬁgured, the dialog box shown in Figure 3-7 appears.

Figure 3-7 Second Telephone Number Dialog Box for PC

4 If you have a second telephone number for your ISDN line,

enter it, and then click Next. If not, leave the ﬁeld incomplete, and then click Done.

After successful conﬁguration of your switch type and SPID number(s), Figure 3-8 appears.

Figure 3-8 Successful Conﬁguration Dialog Box

Configuring the 3C882 ISDN Modem for a PC 3-7

5 Click Finish.

The on-line registration dialog box appears. Enter your information and then click Register Now.

After your information is received, the Successful Registration dialog box will open.

6 Click OK.

A message box indicates that you have correctly conﬁgured your 3C882 ISDN modem.

7 Click No to verify your settings and continue the setup

procedure (recommended). To exit the installation program and leave the default settings, click Yes .

If you clicked No, the Conﬁguration dialog box will open, as shown in Figure 3-9.

Figure 3-9 Conﬁguration Dialog Box for PC

3-8 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

A message bar at the bottom of the dialog box provides status information about the 3C882 ISDN modem.

The Conﬁguration dialog box buttons do the following.

Help. Click the Help button to access help for the Conﬁguration dialog box. There is also comprehensive on-line help accessible from the 3ComImpact IQ program group box.

Tools. Clicking on the Tools button produces buttons for Firmware, Tests, Save and Restore.

■ Firmware. Refer to the readme ﬁle for ﬁrmware download

instructions.

■ Tests. Use the Tests tool only under the direction of

technical support personnel.

■ Save. Pressing the Save button saves the current

Conﬁguration dialog box settings in a ﬁle you name. You can easily restore a previously saved ﬁle to the Conﬁguration dialog box.

■ Restore. Pressing the Restore button restores the 3C882

ISDN modem to a previously saved conﬁguration ﬁle.

Update. Click the Update button to download any conﬁguration parameter changes made to the Conﬁguration dialog box. After you click the Update button, the name changes to Updated to indicate that the changes have been saved to your ISDN modem’s S registers.

Exit. Click Exit to leave the Conﬁguration dialog box.

Running the SPID Wizard Again

The SPID Wizard automatically runs when you are conﬁguring the 3C882 ISDN modem for the ﬁrst time, if you connect the 3C882 ISDN modem to a different ISDN line, or if your ISDN line parameters should change (e.g., your area code). After the ISDN switch type, telephone number(s), and

Configuring the 3C882 ISDN Modem for a PC 3-9

SPID(s) are conﬁgured, clicking on the 3ComImpact IQ globe icon will thereafter display the Conﬁguration dialog box.

If you add a second telephone number to your ISDN line after you run the SPID Wizard, you can use the SPID Wizard to detect the SPID for your second telephone number.

To run the SPID Wizard for a second telephone number:

1 From the Conﬁguration dialog box, check the Enabled box

located in the Number 2 group box.

A message box appears and asks you to conﬁrm that you want to run SPID Wizard.

2 Click OK.

The Second Telephone Number dialog box appears.

3 Enter the second telephone number for your ISDN line

and then click Next.

Figure 3-8 appears.

4 Click Finish.

Conﬁguring Multilink PPP

Multilink PPP is a protocol that provides a method for combining multiple PPP connections. Multilink PPP combines the two ISDN B channels, creating a virtual single digital connection of up to 128 Kbps. Note that the destination you are dialing must also support Multilink PPP, or you will get a single B channel connection instead of the dual-channel link.

By default, Multilink PPP is enabled. To enable or disable Multilink PPP, do the following:

1 Click inside the Multilink check box in the PPP area to

clear it (disable) or check it (enable).

2 Click the Update button to download the change to your

3C882 ISDN modem’s S register.

3-10 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

Additional conﬁguration may be needed for Multilink PPP. For details refer to S registers 82 and 83 in Appendix B, “AT Commands, S Registers, and Result Codes”.

Note that if you disable Multilink PPP (i.e., Register S80=0), you can still place a Multilink PPP call without changing the S 80 register value. In the dial string, enter the ﬁrst telephone number, then the ampersand character followed by the second telephone number. For example:

ATD 908 555 1212 & 908 555 1213

Conﬁguring the B Channel Rate

Specify the B channel rate as 56 Kbps, 64 Kbps, or select TollMizer if you would like to use that feature. TollMizer allows you to place a 56 Kbps data call using a voice channel, which is often less expensive. Note that the device you are calling must also support TollMizer (sometimes referred to as Switch 56 Permissive or Data Over Voice) to take advantage of this feature.

By default, the B channel rate is 56 Kbps. Check with your telephone company for the appropriate B channel rate.

To change the connection speed to 64 Kbps or TollMizer, do the following:

1 Select the appropriate radio button (64 Kbps or TollMizer).

2 Click the Update button to download the change to your

3C882 ISDN modem’s S register.

Conﬁguring Voice Call Routing

The 3C882 ISDN modem allows you to assign a speciﬁc telephone number to a speciﬁed analog phone port. By default, telephone number 1 is assigned to phone port one, and telephone number 2 is assigned to phone port two, as shown in Figure 3-10. This is especially helpful should you

Configuring the 3C882 ISDN Modem for a PC 3-11

have both a telephone and a fax machine connected to your 3C882 ISDN modem’s analog ports.

ISDN U

RS-232

RESET

9 VDC

• 5A MAX

908 555 1212 908 555 1213

Figure 3-10 Voice Call Routing Default Setting

Note the phone port check marks for each telephone number. This default conﬁguration routes each telephone number to a speciﬁed port.

The ISDN Call Waiting default conﬁguration is best served by the recommended scenario shown in Figure 3-10. By default, ISDN Call Waiting has been enabled on Phone Port 1, for use with your telephone, but disabled on Phone Port 2 to prevent potential interruption of calls to your fax machine (S76=1).

One Telephone Number and Two Analog Devices.

If you have only one telephone number for your ISDN line and two analog devices, check the Phone Port 1 and Phone Port 2 boxes located in the Number 1 group box, as shown in Figure 3-11. Calls to that telephone number will ring both devices, allowing you to answer a call using either device.

3-12 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

Note that while you are using the fax machine, for example, you cannot use the telephone to place or receive calls because your ISDN line has only one telephone number.

ISDN U

RS-232

RESET

9 VDC

• 5A MAX

908 555 1212 908 555 1212

Figure 3-11 Conﬁguration for One Telephone Number and Two Devices

Two Telephone Numbers and Two Analog Devices.

If you have two telephone numbers and two analog devices attached to your 3C882 modem, you can choose to have both ISDN telephone numbers ring both devices simultaneously. For this scenario, you would place a checkmark in all four Phone Port boxes, as shown in Figure 3-12

ISDN U

RS-232

RESET

9 VDC

• 5A MAX

908 555 1212 908 555 1212 908 555 1213

908 555 1213

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

Configuring the 3C882 ISDN Modem for a PC 3-13

To change the voice call routing setting:

1 Specify which Phone port should handle the calls

associated with Telephone Number 1 by checking the appropriate Phone Port box.

2 If your ISDN line has two telephone numbers, specify

which Phone port should handle the calls associated with Telephone Number 2.

3 Click the Update button to download the change to your

3C882 ISDN modem’s S register.

Verifying the Conﬁguration

Check the status bar located toward the bottom of the Conﬁguration dialog box. If the parameters were conﬁgured accurately and the 3C882 ISDN modem is ready to send and receive calls, the status bar ﬁelds will appear as shown here.

■ Layer 1: UP

■ SPID 1: Init (if required)

■ TEI 1: Number from 64 to 126

■ SPID 2: Init (if required)

■ TEI 2: Number from 64 to 126 (if required)

The TEI number(s) are not conﬁgured by the user. The TEI number(s) are transmitted by the telephone company for informational purposes only.

Before you close the Conﬁguration dialog box, do the following.

1 Conﬁrm that the Conﬁguration parameters are correct.

3-14 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

2 Click the Update button if you made any changes to the

3C882 ISDN modem conﬁguration.

3 Click Exit to leave the utility.

This completes the ISDN modem conﬁguration procedure.

For Windows 3.x users, go to Chapter 5, “Advanced Conﬁguration,” and review the default settings to ensure that they reﬂect your preferences. If you prefer not to change the default settings, go on to Chapter 7, “Placing and Receiving Calls”.

If you are using Windows 95, Windows NT 3.5.1, or Windows NT 4.0, refer to the appropriate section, “Setup Using Windows 95”, “Setup Using Windows NT 3.5.1 RAS”, or “Setup for Windows NT 4.0” for additional instructions.

For information regarding conﬁguration of the 3C882 ISDN modem with various Internet access software not included in this User Guide, use the 3Com fax service (1) (408) 727-7021 (analog) in the U.S. or visit 3Com’s World Wide Web site at http://www.3Com.com/.

Setup Using Windows 95

This section describes how to set up the 3C882 ISDN modem using Windows 95 Plug and Play. These instructions assume that Windows 95, Microsoft Plus!, and the 3C882 ISDN modem software have already been installed.

To setup your 3C882 ISDN manually and bypass Windows 95 Plug and Play, refer to the section “Setup for Windows NT 4.0” below.

1 Reboot your PC with the 3C882 ISDN modem powered up

and physically connected to your PC.

The New Hardware dialog box appears, shown in Figure 3-13.

Setup Using Windows 95 3-15

Figure 3-13 New Hardware Dialog Box

2 Select the Driver from disk provided by hardware

manufacturer option.

3 Click OK.

3-16 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

The Install From Disk dialog box appears, as shown in Figure 3-14.

Figure 3-14 Install From Disk Dialog Box

4 Insert the 3ComImpact IQ Windows Installation Diagnostic

Utilities diskette into an available ﬂoppy drive.

5 Click OK.

The Select Device dialog box appears, as shown in Figure 3-15.

Figure 3-15 Select Device Dialog Box

Setup Using Windows NT 3.5.1 RAS 3-17

6 Check Show All Devices.

7 Select 3ComImpact IQ for baud rates of up to 115.2Kbps

and click Next.

The 3C882 ISDN modem allows for transfer rates of up to

230.4 Kbps. However, some computers require the installation of additional hardware, such as an accelerated serial port card, to take advantage of this higher speed. Additional conﬁguration steps, as well, are required. Refer to “Setup for 230Kbps” for instructions.

8 Click OK.

This completes the setup procedure for Windows 95. Refer to “Conﬁgure Dial-Up Networking” to setup a remote access conﬁguration, or continue on to Chapter 5, “Advanced Conﬁguration,” to review the default settings and ensure that they reﬂect your preferences. If you prefer not to change the default settings, then go on to Chapter 7, “Placing and Receiving Calls”.

Setup Using Windows NT 3.5.1 RAS

This section describes how to set up the 3C882 ISDN modem using Windows NT RAS version 3.5.1. Note that these instructions assume that the 3C882 ISDN modem software has already been installed.

1 Using the File Manager, locate the Windows NT

MODEM.INF ﬁle in the %SystemRoot%/System32/RAS directory and rename it MODEM.ORG.

For example, if your root directory is Windows, you would look for the Windows NT MODEM.INF ﬁle in the following directory:

C:\windows\System32\RAS

3-18 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

2 Copy the 3C882 ISDN modem MODEM.INF ﬁle to the same

directory as the MODEM.ORG ﬁle.

3 From the main menu, select Control Panel, and then select

Network.

The Network Settings dialog box appears, as shown in Figure 3-16.

Figure 3-16 Network Settings Dialog Box

4 From the Installed Network Software list box, select

Remote Access Service and then click Conﬁgure.

Setup Using Windows NT 3.5.1 RAS 3-19

The Remote Access Setup dialog box appears, as shown in Figure 3-17.

Figure 3-17 Remote Access Setup Dialog Box

5 If a modem is already conﬁgured, select it, and then click

Remove.

6 Click Add.

The Add Port dialog box appears.

7 Select a COM port, and then click OK.

The Remote Access Setup message box appears.

8 Click Cancel.

The Conﬁgure Port dialog box appears.

9 Select 3ComImpact IQ for baud rates up to 115.2 Kbps and

then specify the port usage. Click OK.

The 3C882 ISDN modem allows for transfer rates of up to

The Remote Access Setup dialog box appears.

3-20 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

10 Click Continue.

11 Click OK to exit the Network Settings dialog box.

The Network Settings Change alert box appears.

12 Click Restart Now.

Once your computer has rebooted, you are ready to use the 3C882 ISDN modem.

Refer to Chapter 5, “Advanced Conﬁguration,” to review the default settings and ensure that they reﬂect your preferences. If you prefer not to change the default settings, then go on to Chapter 7, “Placing and Receiving Calls”.

Setup for Windows NT 4.0

This section describes how to set up the 3C882 ISDN modem using Windows NT 4.0. Note that these instructions assume that the 3C882 ISDN modem software has already been installed.

These instructions also apply for Windows 95 manual setup.

1 Insert the 3ComImpact IQ Windows Installation Diagnostic

Utilities diskette into an available ﬂoppy drive.

2 From the Control Panel dialog box, double-click the

Modems icon.

The Modems Properties dialog box appears.

3 Click Add.

The Install New Modem dialog box appears, as shown in Figure 3-18.

Setup for Windows NT 4.0 3-21

Figure 3-18 Install New Modems Dialog Box

4 Check Don’t detect my modem, I will select it from a list and

click Next.

3-22 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

The New Modem Manufacture screen will open, as shown in Figure 3-19.

Figure 3-19 Modem Manufacturers and Models Dialog Box

You will only see a 3Com entry if you have previously installed a 3Com modem.

5 Click Have Disk.

6 Select 3ComImpact IQ for baud rates of up to 115.2K and

click Next.

The 3C882 ISDN modem allows for transfer rates of up to

7 Select the appropriate COM port to which your modem is

connected.

8 Click Next.

Configure Dial-Up Networking 3-23

A dialog box indicates successful setup.

9 Click Finish.

This completes the setup procedure for Windows NT 4.0. Refer to “Conﬁgure Dial-Up Networking” below to setup a remote access conﬁguration, or continue on to Chapter 5, “Advanced Conﬁguration,” to review the default settings and ensure that they reﬂect your preferences. If you prefer not to change the default settings, then go on to Chapter 7, “Placing and Receiving Calls”.

Conﬁgure Dial-Up Networking

This section describes the Dial-Up Networking setup procedure for both Windows 95 and Windows NT 4.0

Dial-Up Networking setup requires speciﬁc Internet Service Provider (ISP) information; your particular setup parameters may vary widely. You may need to check with your ISP for assistance.

Dial Up Networking for Windows 95

If you would like to connect to the Internet, you can choose to have the Internet Setup Wizard to guide you through the procedure or you may choose to conﬁgure Dial-Up Networking manually for other remote connections.

To conﬁgure Dial-Up Networking manually:

1 From the Start menu, select Programs, Accessories, and

Dial-Up Networking.

The Dial-Up Networking window opens.

2 Double click the Make New Connection icon.

3 Enter a name for this connection (such as your ISP).

4 Select 3ComImpact IQ for baud rates up to 115.2 Kbps.

3-24 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

If you have not already set up the modem for 230K, refer to “Setup for 230Kbps” for assistance.

5 Click Conﬁgure.

The 3ComImpact IQ Properties window opens.

6 Select the appropriate COM port and maximum speed

available for your computer.

7 Click OK.

You are returned to the Make New Connection screen.

8 Click Next.

Enter the area code, telephone number and (if necessary) the country code of the location you are dialing.

9 Click Next.

10 Click Finish.

To make a call, double click the connection icon for the destination you wish to access. A connection dialog box will open.

11 Click Connect.

Once your call has been established, you may open any web browser to access the Internet.

Running the Internet Set-Up Wizard

The Internet Set-Up Wizard automates the conﬁguration procedure for connecting to the Internet. You will need the following information, which your Internet Service Provider (ISP) should supply:

■ Name of you ISP

■ Your ISP access number

■ Your user name and password

■ IP Address (if required)

Configure Dial-Up Networking 3-25

■ Subnet Mask (if required)

■ Primary and Alternate DNS Server address

To send and receive e-mail through the Internet:

■ E-mail address

■ Mail server address

To run the Internet Set-Up Wizard, do the following:

The Internet Set-Up Wizard procedure may vary depending on your particular version of Windows 95.

1 Click Start, Programs, Accessories, Internet Tools, and

Internet Setup Wizard.

2 Click Next to view the Connection Type dialog box.

3 Select Connect Using My Phone Line. Click Next to view the

Connection Type dialog box.

4 Choose to “Connect to the Internet using an Internet

Service Provider”.

5 Click Next.

If this is the ﬁrst time you are running the Internet Setup Wizard, the Installing Files dialog box appears.

6 Click Next.

The Choose Modem dialog box opens.

7 Select 3ComImpact IQ for baud rates of up to 115.2 Kbps

or 3ComImpact IQ 230K if you have installed an accelerated serial port for higher baud rates. You must have already followed speciﬁc setup instructions for operating at 230K.

If you have not already set up the modem for 230K, refer to “Setup for 230Kbps” for assistance.

8 Click Next.

3-26 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

The Service Provider dialog box opens.

9 Enter the name of your ISP and click Next.

The Phone number dialog box opens.

10 Enter the area code, telephone number and (if necessary) the

country code of the location you are dialing.

11 Click Next.

The User Name and Password dialog box will open.

12 Enter your user name and password and click Next.

13 Conﬁgure as speciﬁed by your ISP and click Next.

14 Enter the IP address of your DNS server and click Next.

15 Choose the appropriate box to send and receive email

through the Internet. Then enter your email address (e.g., username@isp.com) and your Internet mail server address.

16 Click Next and Finish to exit the Internet Setup Wizard.

This completes the setup procedure for the Internet Setup Wizard. Refer to Chapter 5, “Advanced Conﬁguration,” to review the default settings and ensure that they reﬂect your preferences. If you prefer not to change the default settings, then go on to Chapter 7, “Placing and Receiving Calls”.

Dial-up Networking for Windows NT 4.0

To conﬁgure Dial-Up Networking for Windows NT 4.0, follow these instructions.

1 Click Start, Programs, Accessories, and Dial-Up-Networking.

Click New to create a new connection.

Configure Dial-Up Networking 3-27

The New Phonebook Entry screen opens, as shown in Figure 3-20.

Figure 3-20 New Phonebook Entry Wizard

If you have not yet conﬁgured a Dial-Up Networking connection, a message will indicate that your phonebook is empty. Click OK to add an entry.

2 Type a name for your connection, and click Next.

3 Select “I’m calling the Internet” and click Next.

4 Enter your ISP’s ISDN access number, and click Next.

5 Click Finish to close the New Phonebook Entry Wizard.

The Phonebook entry screen opens, as shown in Figure 3-21.

3-28 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

Figure 3-21 Phonebook Entry Screen

You now have an opportunity to verify various settings of your Dial-Up Networking connection.

6 Click More, and select “Edit entry and modem properties”.

Verify your ISP’s ISDN access number and your modem selection.

7 Click the Server tab. The Server Type screen opens, as

shown in Figure 3-22.

Figure 3-22 Server Type Screen

Configure Dial-Up Networking 3-29

8 Choose “PPP: Windows NT, Windows 95 Plus, Internet”

from the Dial-up server type drop down box.

9 Check TCP/IP if you are dialing into an ISP for Internet

access.

If you are accessing a remote network, such as a corporate LAN, check with your MIS network administrator for the appropriate Network Protocols.

10 Click the TCP/IP Settings button.

In most cases your ISP will provide a dynamic IP address; if so check “Server assigned IP address”. Enter your DNS and WINS server addresses if required.

If your ISP has assigned you a dedicated IP address, click “Specify an IP Address” and enter it here.

11 Click OK to return to the Phonebook Entry screen.

12 Click the Script tab. Set Script to None unless otherwise

speciﬁed by your ISP.

13 Click the Security tab.

Change the Authentication method to “Accept any authentication, including clear text” for PAP authentication or “Accept Only Encrypted Authentication” for CHAP.

14 Click OK.

The 3C882 ISDN modem does not support Microsoft Encrypted Authentication. X.25 is not supported either; therefore, no changes are required on the X.25 screen.

This completes the Dial-Up Networking setup procedure for Windows NT 4.0. Refer to Chapter 5, “Advanced Conﬁguration,” to review the default settings and ensure that they reﬂect your preferences. If you prefer not to change the default settings, then go on to Chapter 7, “Placing and Receiving Calls”.

3-30 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

Setup for 230Kbps

The 3C882 ISDN modem allows for transfer rates of up to

230.4 Kbps. Note that some computers require the installation of additional hardware, such as an accelerated serial port card, to take advantage of this higher speed.

There are two setup scenarios covered:

■ 230K setup for Windows NT 3.5.1

■ 230K setup for Windows 95 and Windows NT 4.0

Setting up 230K for Windows NT 3.5.1

These instructions require prior installation of the modem.inf driver, which is installed as part of the initial setup procedure. Refer to “Setup Using Windows NT 3.5.1 RAS” earlier in this chapter for assistance.

1 Ensure that your computer’s COM port and

communications software support 230.4 Kbps.

For instructions on sending AT commands, refer to the section “Changing the Parameter Settings” on page 5-4.

2 Using terminal emulation software send the command

$B 230400

to the 3C882 ISDN modem. This will set the baud rate to 230.4 Kbps.

Once the baud rate is set to a ﬁxed amount you will no longer be able to access the Conﬁguration dialog box to make changes. Refer to “Restoring the 3C882 ISDN Modem to Autobaud” on page 8-9 for assistance.

3 Save this setting by entering

AT&W and press return.

Next you must install the 230K driver to take advantage of the speed increase.

Setup for 230Kbps 3-31

4 From the Main menu, select Control Panel, then select

Network.

The Network Settings dialog box appears.

5 Click Conﬁgure.

The Remote Access Setup dialog box appears.

6 Click Conﬁgure.

7 Select 3ComImpact IQ 230K.

8 Click OK.

9 Change the setting of your application program to 230400

bps.

This completes the procedure to change the baud rate to

230.4 Kbps for Windows NT 3.5.1.

Setting up 230K for Windows 95 and Windows NT 4.0

These instructions require prior installation of the impact.inf driver, which is installed as part of the initial setup procedure. Refer to “Setup Using Windows 95” or “Setup for Windows NT

4.0” earlier in this chapter for assistance.

1 Ensure that your computer’s COM port and

communications software support 230.4 Kbps.

For instructions on sending AT commands, refer to the section “Changing the Parameter Settings” on page 5-4.

2 Using terminal emulation software (such as

HyperTerminal) send the command

AT $B 230400 to the

3-32 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

3C882 ISDN modem. This will set the baud rate to 230.4 Kbps.

3 Save this setting by entering

AT&W and press return.

Next you must install the 230K driver to take advantage of the higher baud rate.

4 From the Control Panel dialog box, double click the

Modems icon.

The Modems Properties dialog box appears.

5 Click Add.

The Install New Modem dialog box appears.

6 Check the box to prevent automatic detection of the

3ComImpact IQ ISDN modem and click Next.

The dialog box listing modem manufacturers and modem models appears.

7 From the Manufacturers list box, select 3COM, and from

the Models list box, select 3ComImpact IQ 230K.

8 Click Next.

9 Select the appropriate COM port. and click Next.

A dialog box indicates successful setup.

10 Click Finish.

11 Be sure to change the setting of your application program

(such as Dial-Up Networking for Windows 95) to 230400 bps.

Setup for 230Kbps 3-33

This completes the procedure to change the baud rate to

230.4 Kbps for Windows 95 and Windows NT 4.0.

3-34 CHAPTER 3: CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

CONFIGURATION FOR AN

APPLE MACINTOSH COMPUTER

This chapter describes the conﬁguration for the 3C882 ISDN modem for use with an Apple Macintosh computer. Main topics covered are:

■ Conﬁguring the 3C882 ISDN modem

■ Conﬁguring Internet access for a Macintosh computer

You will need the ISDN telephone numbers from the ISDN Information Sheet you completed in Chapter 1.

Conﬁguring the 3C882 ISDN Modem for a Macintosh Computer

The main steps are shown in Figure 4-1.

Install 3C882

software

Run

SPID Wizard

Configure

Multilink PPP, B channel rate, & voice call routing

Verify

configuration

Figure 4-1 3C882 Conﬁguration Steps for a Macintosh

4-2 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

Installing the 3C882 Software

To install the 3C882 ISDN modem software in an Apple Macintosh computer:

1 Insert the 3ComImpact IQ Installer Diagnostic Utilities

software utility diskette into the ﬂoppy drive and then double-click the 3ComImpact IQ Installer icon.

A message box appears as shown in Figure 4-2.

Figure 4-2 Installation Message Box

2 Click Continue.

The Readme ﬁle opens. You can choose to review the document or print the ﬁle.

3 Click Continue to install the software.

The Software Installation Location dialog box opens.

4 Select the location on your hard drive where you would

like to install the 3ComImpact IQ folder. If you do not want to use the default folder name, it may be changed.

5 Click Install.

After the 3ComImpact IQ ISDN modem software is installed, Figure 4-3 will open.

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

Figure 4-3 Successful Installation Message Box

6 Click OK.

This completes the software installation.

Running the SPID Wizard

The SPID Wizard automatically detects your telephone company’s switch type and conﬁgures the SPID(s). The SPID Wizard automatically runs when you are conﬁguring the 3C882 ISDN modem for the ﬁrst time, if you connect the 3C882 ISDN modem to a different ISDN line, or if any of your ISDN line parameters have changed (e.g., an area code). Once the ISDN switch type, telephone number(s) and SPID(s) have been conﬁgured, clicking on the 3ComImpact IQ program icon will thereafter directly display the Conﬁguration dialog box shown in Figure 4-9.

1 Double-click the 3ComImpact IQ program icon shown in

Figure 4-4.

Figure 4-4 3ComImpact IQ Program Icon

4-4 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

The Select Modem Port screen appears, as shown in Figure 4-5.

Figure 4-5 Select Modem Port Screen

2 Select the port to which the 3C882 ISDN modem is

connected and then click OK.

The SPID Wizard start screen appears, as shown in Figure 4-6.

Figure 4-6 SPID Wizard Start Screen

If you do not want to run the SPID Wizard, click Cancel to conﬁgure your values manually via the conﬁguration dialog box (see Figure 4-9). Once there you can select your ISDN switch type, enter the telephone number(s) and, if required, enter the corresponding SPID(s) for your ISDN line. Note that

Configuring the 3C882 ISDN Modem for a Macintosh Computer 4-5

the SPID Wizard is the recommended method for conﬁguring your SPID values.

3 Click Next.

The SPID Wizard ﬁrst checks for ISDN layer 1status, and then conﬁgures the switch type.

After the switch type is conﬁgured, the First Telephone Number dialog box appears, as shown in Figure 4-7.

Figure 4-7 First Telephone Number Screen for Macintosh

4 Enter the ﬁrst telephone number for your ISDN line and

then click Next.

4-6 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

After the SPID Wizard conﬁgures the SPID for the ﬁrst telephone number, Figure 4-8 appears.

Figure 4-8 Second Telephone Screen for Macintosh

5 If you have a second telephone number for your ISDN line,

enter it and click Next. If not, leave the ﬁeld incomplete, and then click Done

If you entered a second telephone number for your ISDN line, the SPID for the second telephone number is conﬁgured.

A message box indicates that the conﬁguration was successful.

6 Click Done.

The on-line registration dialog box appears. Click Register and enter your information. When complete, click Register Now.

Configuring the 3C882 ISDN Modem for a Macintosh Computer 4-7

After your information has been sent, the Conﬁguration dialog box appears, as shown in Figure 4-9.

Figure 4-9 Conﬁguration Dialog Box for Macintosh

The Conﬁguration dialog box buttons do the following.

Update Conﬁguration. Click Update Conﬁguration to download parameter changes to your ISDN modem’s S registers.

Update Firmware. Refer to the readme ﬁle for ﬁrmware download instructions.

Diagnostics. Use the Diagnostics tool only under the direction of technical support personnel.

Quit. Click Quit to leave the Conﬁguration dialog box.

Conﬁguring Multilink PPP

4-8 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

are dialing must also support Multilink PPP, or you will get a single B channel connection instead of the dual-channel link.

By default, Multilink PPP is enabled. To enable or disable Multilink PPP, do the following:

1 Click the Multilink check box in the PPP area to clear it

(disable) or check it (enable).

2 Click the Update Conﬁguration button to download the

change to your 3C882 ISDN modem’s S register.

Additional conﬁguration may be needed for Multilink PPP. For details refer to S registers 82 and 83 in Appendix B.

ATD 908 555 1212 & 908 555 1213

Conﬁguring the B Channel Rate

By default, the B channel rate is 56 Kbps. Check with your telephone company for the appropriate B channel rate.

To change the connection speed to 64 Kbps or TollMizer, do the following:

1 Select the appropriate radio button (64 Kbps or TollMizer).

2 Click the Update button to download the change to your

3C882 ISDN modem’s S register.

Configuring the 3C882 ISDN Modem for a Macintosh Computer 4-9

Conﬁguring Voice Call Routing

ISDN U

RS-232

RESET

9 VDC

• 5A MAX

908 555 1212 908 555 1213

Figure 4-10 Voice Call Routing Default Setting

Note the phone port check marks for each telephone number. This default conﬁguration routes each telephone number to a speciﬁed port.

The ISDN Call Waiting default conﬁguration is best served by the recommended scenario shown in Figure 4-13. By default, ISDN Call Waiting has been enabled on Phone Port 1, for use with your telephone, but disabled on Phone Port 2 to prevent potential interruption of calls to your fax machine (S76=1).

One Telephone Number and Two Analog Devices.

If you have only one telephone number for your ISDN line and two analog devices, check the Phone Port 1 and Phone Port 2 boxes located in the Number 1 group box, as shown in

4-10 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

Figure 4-11. Calls to that telephone number will ring both devices, allowing you to answer a call using either device.

ISDN U

RS-232

RESET

9 VDC

• 5A MAX

908 555 1212 908 555 1212

Figure 4-11 Conﬁguration for One Telephone Number and Two Devices

Note that while you are using the fax machine, for example, you cannot use the telephone to place or receive calls because your ISDN line has only one telephone number.

Two Telephone Numbers and Two Analog Devices

ISDN U

RS-232

RESET

9 VDC

• 5A MAX

908 555 1212 908 555 1213

Configuring the 3C882 ISDN Modem for a Macintosh Computer 4-11

Figure 4-12 Conﬁguration to ring both ports simultaneously

To change the voice call routing setting:

1 Specify which Phone port should handle the calls

associated with Telephone Number 1.

2 If your ISDN line has two telephone numbers, specify

which Phone port should handle the calls associated with Telephone Number 2.

3 Click the Update Conﬁguration button to download the

change to your 3C882 ISDN modem’s S register.

Verifying the Conﬁguration

Check the status bar located toward the bottom of the Conﬁguration dialog box to verify correct conﬁguration. If the parameters were conﬁgured accurately and the 3C882 ISDN modem is ready to send and receive calls, the status bar ﬁelds will appear as shown here.

The TEI number(s) are not conﬁgured by the user. The TEI number(s) are provided by the telephone company for informational purposes only.

■ Layer 1: UP

■ SPID 1: Init (if required)

4-12 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

■ TEI 1: Number from 64 to 126

■ SPID 2: Init (if required)

■ TEI 2: Number from 64 to 126 (if required)

Before closing the Conﬁguration dialog box, do the following.

1 Conﬁrm that the Conﬁguration dialog box parameters are

correct.

2 Click the Update Conﬁguration button if you made any

changes to the 3C882 ISDN modem conﬁguration.

3 Click Quit to exit the Conﬁguration dialog box.

This completes the 3C882 ISDN modem conﬁguration.

Conﬁguring Internet Access for a Macintosh Computer

There are two Internet Access Conﬁguration scenarios covered:

■ Open Transport (1.1 or higher) with OT/PPP

■ Open Transport (1.1 or higher) with FreePPP

Set Up Using OT/PPP and Open Transport

This section describes setting up the 3C882 ISDN modem for use with Apple’s Open Transport PPP (OT/PPP) in conjunction with Apple’s Open Transport networking software (version

1.1 or higher). These instructions assume that the pertinent software has already been installed on your system.

Configuring Internet Access for a Macintosh Computer 4-13

1 Activate the PPP control panel by choosing the Apple

menu, Control Panels and then PPP. The PPP control panel opens as shown in .

Figure 4-13 PPP Control Panel

2 Conﬁgure the PPP control panel as speciﬁed by your ISP.

3 Open the Modem control panel by choosing the PPP pull

down menu and selecting Modem.

The Modem control panel opens as shown in Figure 4-14.

4-14 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

Figure 4-14 OT/PPP Modem Control Panel

4 Choose the port to which your modem is attached from

the Connect via pop up menu. Then select the appropriate modem script ﬁle from the Modem menu that best matches your dial up criteria.

For example, if your ISP accepts connections at 64Kbps, and your computer’s COM port can handle speeds up to 115K, then you would choose the 3ComImpact™ IQ-64k-115K modem script.

NOTE: Users of Apple’s System 7.6 or later must move the 3ComImpact IQ Modem Script ﬁles into a separate folder in order to access them from the OT/PPP Modem control panel. These CCL scripts were placed in your Extensions folder (located in the System folder) during installation of the 3ComImpact IQ ISDN modem software. If you are using System 7.6 or later, drag these modem script ﬁles from the Extensions folder into the Modem Scripts folder (also located in the Extensions folder). Then select the appropriate script from the Modem menu.

5 Close the Modem control panel by choosing File and Close.

This returns you to the PPP control panel, as shown in .

Configuring Internet Access for a Macintosh Computer 4-15

6 Open the TCP/IP control panel by choosing TCP/IP from

the PPP pull down menu.

The TCP/IP control panel opens as shown in Figure 4-15.

Figure 4-15 TCP/IP Control Panel

7 Choose PPP from the Connect via pop up menu, and Using

PPP Server from the Conﬁgure menu (or Manually if

speciﬁed by your ISP).

8 Enter the Name server address(es) as directed by your ISP,

and the appropriate Search domain(s) if required. Then choose File and Close. When asked to save changes do so by choosing Save.

This returns you to the PPP control panel, shown in .

9 Close the PPP control panel by choosing File and Close.

When asked to save changes, choose Save.

10 To make a connection, open the PPP control panel and

choose Connect.

Once your call has been authenticated, you may open any web browser to access the Internet, such as Netscape or Microsoft’s Internet Explorer.

4-16 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

Set Up Using FreePPP with Open Transport

FreePPP is a freeware application for accessing the Internet available for use with Apple’s Open Transport networking software (version 1.1 or higher) or MacTCP, Apple’s older networking software. These instructions cover Open Transport conﬁguration only, and assume that the pertinent software has already been installed on your system.

These instructions are for FreePPP 2.5v2.

1 Open FreePPP Setup from the menu bar control panel

located along the top of your Macintosh screen (you must have the FreePPP Setup control panel installed in your Control Panels folder to access and make changes to FreePPP.)

The FreePPP Setup screen opens as shown in Figure 4-16.

Figure 4-16 FreePPP Setup Screen

NOTE: If you do not see the General, Accounts or Locations tabs as shown in Figure 4-16, click the diamond on the left hand side of the FreePPP setup screen to the down position.

2 Click on the Accounts tab and select New.

Configuring Internet Access for a Macintosh Computer 4-17

The Account screen will open as shown in Figure 4-17.

Figure 4-17 FreePPP Account Screen

3 Conﬁgure the ﬁelds as speciﬁed by your Internet service

provider.

Generally you would enter the name of your ISP as the Server Name. However you may wish to specify a more unique description to distinguish this particular dial up proﬁle. For example, you may want to set up two types of connections to the same ISP, one for single channel 64 Kbps calls and another for Multilink dual channel 128 Kbps calls. In this case, you should enter distinguishable names such as ISP 64K and ISP 128K.

4 Click the Connection tab at the top of the Account screen.

The Connection conﬁguration screen will open as shown in.Figure 4-18

4-18 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

Figure 4-18 FreePPP Connection Screen

5 Choose the maximum COM port rate available for your

computer, and then select CTS & RTS (DTR) from the pop up menu, as shown in Figure 4-18. Click OK to return to the FreePPP setup screen.

6 Click the General tab to return to the FreePPP Setup

screen. Then click Modem Setup to reveal the FreePPP Modem Setup screen as shown in Figure 4-19.

Figure 4-19 FreePPP Modem Setup Screen

Configuring Internet Access for a Macintosh Computer 4-19

7 Choose the port to which your 3ComImpact IQ ISDN

modem is attached. Under Modem Init String Settings, click Use: and add

at&d0. Click OK to return to the FreePPP

Setup screen.

NOTE: You may want to set up unique modem conﬁgurations for each dial up Account proﬁle (i.e., one Multilink PPP dial up account and one 64K Single link dial up). In this case, you would need to set speciﬁc modem init strings for each Account. To do this, check Use init string from account

conﬁguration in the Modem Init Strings Settings of the Modem Setup screen shown in Figure 4-19. You would then

specify a speciﬁc modem init string under the Connection tab of each Account conﬁguration proﬁle that you create.

For example, to set up a speciﬁc account proﬁle for Multilink PPP calls, you would add

S80=1 to the end of any existing

init string you have; your complete init string would then read

at&d0S80=1.

Multilink PPP calls may also be designated via the Conﬁguration dialog box.

8 Click Open TCP/IP to access the TCP/IP control panel shown

in Figure 4-20.

4-20 CHAPTER 4: CONFIGURATION FOR AN APPLE MACINTOSH COMPUTER

Figure 4-20 FreePPP TCP/IP Control Panel

9 Choose FreePPP from the Connect via pop up menu.

10 Choose Using PPP Server from the Conﬁgure menu (or

Manually if speciﬁed by your ISP). Enter the Name Server Address(es) as directed by your ISP, and the appropriate Search Domain(s) if required. Then choose File and Close. When asked to save changes do so by choosing Save.

11 To make a connection, choose Open PPP Connection from

the FreePPP menu bar control panel located at the top of your screen. Alternatively, choose Open FreePPP Setup, also located in the FreePPP menu bar control panel, click on the Accounts tab, highlight the particular dial up account that you wish to access, and click Connect.

Once your call has been authenticated, you may open any web browser to access the Internet, such as Netscape or Microsoft’s Internet Explorer.

ADVANCED CONFIGURATION

This chapter presents information to guide you through advanced conﬁguration options available for the 3C882 ISDN modem.

Advanced Conﬁguration Parameter Default Values

To change advanced conﬁguration parameter values, you will need terminal emulation software which will allow you to use AT commands.

The Windows 95 and Windows NT operating systems provide HyperTerminal terminal emulation software. For Macintosh users, terminal emulation software was provided in the 3ComImpact IQ folder during software installation.

The advanced conﬁguration parameters and their default settings are as follows:

■ QuickSelect (enabled)

■ Dynamic Bandwidth Allocation (enabled)

■ Auto Answer (disabled)

■ Compression (enabled)

■ Baud Rate (automatic detection of rates up to 115.2 Kbps)

Each parameter is described in detail in the following sections. If the default settings meet your preferences, go on to Chapter 7, “Placing and Receiving Calls.”

For instructions on sending AT commands, refer to the section “Changing the Parameter Settings” on page 5-4.

5-2 CHAPTER 5: ADVANCED CONFIGURATION

QuickSelect

The QuickSelect feature (S71=0, by default) automatically detects and implements the protocol required for each digital call, either V.120 or Async-Sync PPP. Typically, V.120 is used for communication between two computers, whereas PPP is used for communication between a computer and an Internet service provider.

Dynamic Bandwidth Allocation

DBA (S70=3, by default) is a method of automatically reallocating bandwidth to allow you to place or receive a voice call while a Multilink PPP call is active (i.e., both B channels are in use).

In this situation, when you lift the handset to place an outgoing call or to answer an incoming call, one of the B channels is temporarily removed from the Multilink PPP call and is used for the voice call.

Once the voice call ends, that B channel is automatically returned to the Multilink PPP call. Although throughput is reduced to one channel while the voice call is active, the integrity of the Multilink PPP call is maintained.

If you are on the receiving end of a Multilink PPP call (i.e., someone has dialed into your 3C882 ISDN modem) and you place a voice call, one of the B channels will still be allocated for the new voice call. However, once the voice call ends, that B channel cannot be returned to the incoming Multilink PPP call. The B channel can only be returned to the Multilink PPP call for outgoing Multilink PPP calls.

Outgoing DBA takes precedence over incoming DBA. For example, during a Multilink PPP call, you receive an incoming voice call over Phone port 1. You may, however, prefer to place an outgoing call over Phone port 2 and ignore the incoming call. When you place your call over Phone port 2,

Advanced Configuration Parameter Default Values 5-3

the incoming call is dropped. The calling party will still hear ringing, and must retry their call.

If you have a Multilink PPP call active and you receive an incoming voice call, one of the two B channels will not be assigned to the voice call until you answer the voice call. The LED remains green until the call is answered.

Auto Answer

When Auto Answer is disabled (S0=0, by default), a RING message is delivered to the RS-232 serial port upon reception of an incoming data call to the 3C882 ISDN modem. Enter the command

CONNECT message is then delivered to the RS-232 port upon

AT A to answer the incoming data call. A

successful connection.

If Auto Answer is enabled (S0=(1-255)), the data call is automatically answered after the number of rings speciﬁed via the S register, and a

CONNECT message, along with the

speed of the connection, is delivered to the RS-232 port.

Compression

Compression is a method of reducing the size of transferred data without losing any information. The 3C882 ISDN modem automatically compresses data to improve data transfer times using the hi/fn LZS version 5 compression method.

Compression is enabled (%C2, by default) and will automatically be invoked unless you are running compression on your computer. If you are running compression on your computer, that compression method will be used instead of 3C882 compression even if 3C882 compression is enabled. AT%C0 will disable compression.

Baud Rate

By default, the baud rate is set to Autobaud ($B0). Autobaud automatically detects the maximum data rate of your computer’s COM port. Rates up to 115.2 Kbps can be detected automatically. 3Com recommends that you leave

5-4 CHAPTER 5: ADVANCED CONFIGURATION

Autobaud enabled unless you want to set the baud rate to

230.4 Kbps. The command AT $B (baud rate) is used to set a speciﬁc baud rate, such as 230.4 Kbps. Refer to Appendix B for a list of acceptable values.

To access the 3C882 Conﬁguration dialog box, Autobaud must be enabled. If the baud rate is set to a speciﬁc rate, you will not be able to access the Conﬁguration dialog box. Refer to Chapter 8, “Restoring the 3C882 ISDN Modem to Autobaud.” for assistance.

Changing the Parameter Settings

To change parameter settings:

1 Launch your communications or terminal emulation

software.

2 Be sure the 3C882 ISDN modem is in command mode

(sometimes called local mode or terminal mode) so that it interprets your commands.

When powered on, the 3C882 ISDN modem automatically starts in command mode. If you have recently used the 3C882 ISDN modem to make a call and have not yet disconnected, type +++ to switch to command mode.

3 Type:

AT <command>

4 Press [Enter] or [Return].

Refer to Table 5-1 for the appropriate command. For example, to disable compression, you would type

AT%C0

and then press [Enter] or [Return].

An AT command line starts with the characters

AT. The

command line accepts up to 40 command characters in the line (not including the two AT characters, or spaces).

AT commands may be used to set (or change) a value, as well as to read the status of an existing value by including a

Changing the Parameter Settings 5-5

question mark (?) after the particular value. For example, to read the status of S register 63, you would type

AT S63?

and then press [Enter] or [Return].

After completing its tasks, the 3C882 ISDN modem sends a message to the screen followed by a result code. Refer to Appendix B for a complete list of result codes.

5 To change another parameter setting, repeat steps 1

through 4. Otherwise, go on to Chapter 7, “Placing and Receiving Calls.”

Table 5-1 Changing Default Settings

Parameter Default Value To Change the Default

QuickSelect Enabled (S71=0) Send the command ATS71=1 to use Async-Sync

DBA Enabled for both

incoming and outgoing calls (S70=3)

Auto Answer Disabled (S0=0) Send the command ATS0=(number of rings before

Compression Enabled (%C2) Send the command AT%C0 to disable compression.

Autobaud Enabled ($B0) Send the command AT$B (rate) to set a specific

PPP exclusively or ATS71=2 to use V.120 exclusively.

Send the command ATS70=0 to disable DBA.

the ISDN modem answers the call) to enable Auto Answer.

baud rate. Acceptable values are 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, and 230400.

Send the command AT$B0 to return to Autobaud.

Autobaud does not exceed 115200. For 230400 you must send the command AT $B230400 to the ISDN modem.

* To access the Configuration dialog box, the baud rate must be set to Autobaud.

5-6 CHAPTER 5: ADVANCED CONFIGURATION

SUPPLEMENTARY VOICE FEATURES

Supplementary Voice Features

This chapter provides an overview of the supplementary voice features which are available for the 3C882 ISDN Modem. These voice features are as follows:

■ Call Forwarding

■ ISDN Call Waiting

■ Call Conference (3 Way Calling)

■ Call Transfer

To use Call Conference, as well as Call Transfer, your ISDN line must support Flexible Calling. To use ISDN Call Waiting, your ISDN line must support Additional Call Offering (ACO). Check with your telephone company to determine whether or not these services are supported. Note that there may be an extra charge to support these features. Refer to Chapter A, “Ordering ISDN Service” for additional information.

In some cases your telephone company may enable supplementary voice features service on your ﬁrst telephone number only. You may need to speciﬁcally request that these services be enabled on your second telephone number as well.

Call Forwarding

The ISDN modem passively supports Call Forwarding. If you subscribe to this service, which you must order separately from your telephone company, you can enter the appropriate command from the analog telephone attached to your ISDN modem and it will be passed through. Your

6-2 CHAPTER 6: SUPPLEMENTARY VOICE FEATURES

telephone company should provide the appropriate commands.

The 3C882 ISDN modem will announce a forwarded call by producing a short ring on the telephone that is routed to the forwarded number.

ISDN Call Waiting

ISDN Call Waiting allows you to place a voice call on hold while you answer an incoming voice call.

By default, ISDN Call Waiting is disabled on analog port 2 (S76=1). To avoid potential call interruptions when sending or receiving a fax transmission, you should therefore install your fax machine on analog port 2.

Table 6-1 How to Use Call Waiting

How Do I Do This

Place the first call on hold and answer the second?

Place the second call on hold and then switch back to the first call?

End the first call and then answer the second call?

What if the call on hold is dropped?

What if the active caller hangs up?

When you hear the call waiting indicator, press and immediately release the switch hook button.

Press and release the flash hook. The second call is then put on hold.

Hang up the telephone, wait for the telephone to ring, and then answer the call.

If the call on hold hangs up at the far end, you will receive no notice. If you press and release the switch hook button, you will get a dial tone, indicating that the call on hold was dropped. Press and release the switch hook button again to return to the previously active caller.

If the active caller hangs up, the call on hold remains on hold until you retrieve it by pressing and immediately releasing the switch hook button. If you hang up while a call is on hold, the telephone will ring to indicate that there is a call on hold. If you do not retrieve the call within 6 seconds, the call is dropped.

Supplementary Voice Features 6-3

The analog method for disabling Call Waiting, typically *70, is not available for ISDN. Instead, you must set the appropriate S Register (S76) to activate or deactivate the Call Waiting feature. Refer to Appendix B, “AT Commands, S Registers, and Result Codes” for the appropriate values.

Troubleshooting

What if the call is busy? The 3C882 ISDN modem supports two simultaneous voice calls per voice port. If you already have two calls up (e.g., one active and one on hold), any incoming calls will be rejected (i.e., the caller hears a busy signal). An incoming call will also be rejected during an outgoing call that is not yet active, or while your telephone is ringing for an incoming call.

If you should hear the Call Waiting indicator when attempting to dial a third party, the Call Waiting takes precedence.

Call Conference

Call Conference (also referred to as Three-Way Calling or TWC) is a voice call feature that allows you to add another party to an existing call. This feature can be used whether you have received or have placed the ﬁrst call.

You cannot conference two incoming calls. You must initiate the third call in order to activate Call Conferencing.

Table 6-2 How to Use Call Conference

How Do I Do This

Place a new conference call? While the first call is active, press and release the

Drop the last party added to the conference call?

switch hook button. The B channel LED light flashes to indicate that the first call is on hold, and you will hear a dial tone. Then dial a third party number.

After the third party has answered, press and release the switch hook button to connect all three parties.

To drop the last party added to the conference call, press and release the switch hook button.

6-4 CHAPTER 6: SUPPLEMENTARY VOICE FEATURES

Table 6-2 How to Use Call Conference

How Do I Do This

Abort the second dial and switch back to the first call?

What if I hear a dial tone when I attempt to conference all three parties?

What if the telephone rings after I hang up?

If the dialed party is busy, press and release the switch hook button to cancel the call and reconnect you to the first call.

If you dialed a wrong number, or the far end does not answer, hang up the phone to abort the attempted call. The phone will then ring, indicating that the first call is on hold. Answer the phone to reconnect you to the first call.

A dial tone indicates that one of the parties has dropped their call. Press and release the switch hook button to return to the previously active call. You can then conference a third party as described previously.

While you try to conference a call, the active call will be put on hold to allow you to dial a new call. If you hang up the phone before the call is connected, the telephone will ring to let you know that you still have a call on hold. The call on hold will be disconnected in 6 seconds if the call is not answered.

Call Drop

Call Drop allows you to remove the last caller to a conference. After a conference call has been established, simply press and release the ﬂash hook button to drop the last caller added. See S register 79 in Appendix B for more Call Drop information.

Call Transfer

Call Transfer is a voice call feature that allows you to transfer a call to a third party. This feature can be used whether you have received or have placed the ﬁrst call.

Table 6-3 How to Use Call Transfer

How Do I Do This

Place a new call? While the first call is active, press and release the

switch hook button, wait for the dial tone, and then dial a third party number.

After the third party has answered, press and release the switch hook button to conference all three parties, and then hang up the telephone to transfer the call.

Table 6-3 How to Use Call Transfer

How Do I Do This

Cancel the second call and switch back to the first call?

If the dialed party is busy, press and release the switch hook button to cancel the attempted call and reconnect you to the first call. If you should hang up, the phone will ring back, indicating that you have a call on hold.

If you experience difﬁculty implementing any of the Supplementary Voice Features, conﬁrm that you have these features enabled on your ISDN line, and that the default Call Conferencing, Call Transfer, and Call Drop S register values (S77, S78, and S79) match the values required by your telephone company.

Supplementary Voice Features 6-5

ISDN Service from Paciﬁc Bell

If your ISDN line has been provisioned through Paciﬁc Bell, and you are having difﬁculty implementing Call Hold, Call Drop, Call Conference and Call Transfer, you may need to make three additional S register changes to take advantage of these Flexible Calling features.

1 Contact Paciﬁc Bell and discern the appropriate Call Hold,

Call Drop, Call Conference and Call Transfer key values.

2 Launch your terminal emulation software.

You will need to change the values of S registers 77, 78, and

79.

3 Send the following command to the 3C882 ISDN modem:

AT S77=x S78=x 79=x

(where x is the key value supplied by Paciﬁc Bell) and press [Enter] or [Return].

6-6 CHAPTER 6: SUPPLEMENTARY VOICE FEATURES

This completes the procedure for Paciﬁc Bell ISDN users.

Refer to Chapter 5, “Changing the Parameter Settings” or Appendix B, “AT Commands, S Registers, and Result Codes” for further assistance.

PLACING AND RECEIVING CALLS

This chapter illustrates how to place and receive a variety of calls with your 3C882 ISDN modem. The 3C882 ISDN modem uses AT commands and S registers for call management.

This chapter covers the following:

■ Placing ISDN data calls

■ Placing a Multilink PPP call

■ Placing a TollMizer call

■ Receiving ISDN data calls

■ Placing calls using an analog phone port

■ Receiving calls using an analog phone port

■ ISDN Call Logging

Placing ISDN Data Calls

You can let your communications software send and receive calls for you, or you can use a terminal emulator to place calls manually. Software that communicates using AT commands (such as HyperTerminal) is required to control the 3C882 ISDN modem. You can choose to enter these codes manually; however they are often entered automatically by modem communications software.

When you place a call, the B channel LED(s) ﬂash green and then remain lit once the call is established. (If you are running Multilink PPP, one B channel ﬂashes and then remains lit. Then the second B channel ﬂashes and it too remains lit.)

For Macintosh users, add string of your communications software.

&DO to the modem initialization

7-2 CHAPTER 7: PLACING AND RECEIVING CALLS

Placing Calls Automatically

If you are using standard communications software, select the 3ComImpact IQ ISDN modem. If the 3ComImpact IQ ISDN modem is not listed, select a Hayes modem conﬁguration and dial out through the 3C882 ISDN modem. If you are using a Hayes-compatible modem conﬁguration, you may have to manually conﬁgure settings such as baud rate. Refer to your communications software documentation for more details.

Placing Calls Manually

You can place calls manually using AT commands. Your communications software must be in terminal emulation mode.

Follow these steps to use AT commands:

In most situations, an initialization string is not necessary with the 3C882 ISDN modem. If an initialization string is required by the communications software or server, use the Hayes default initialization string.

-compatible

1 Launch your communications software.

2 Be sure the 3C882 ISDN modem is in command mode

(sometimes called local mode or terminal mode) so that it interprets your commands.

When your computer is powered on, the 3C882 ISDN modem automatically starts in command mode. If you have recently used the 3C882 ISDN modem to make a call and have not yet disconnected, type +++ to switch to command mode.

3 Type:

AT D <telephone number>

The 3C882 ISDN modem recognizes the AT command AT D to dial a digital ISDN data call. Correct examples of outgoing

circuit-switched ISDN modem commands with dial strings are:

AT D 1 408 654 2703

ATD14086542703

For a summary of the AT command set, see Appendix B.

4 Press [Enter] or [Return].

After completing its tasks, the 3C882 ISDN modem sends a message to the screen.

An AT command line starts with the characters AT. The command line can accept up to 40 command characters in the line (not including the two AT characters, or spaces) Refer to Chapter 5, “Changing the Parameter Settings” for assistance on AT commands.

Placing Multilink PPP Calls

Placing ISDN Data Calls 7-3

Before you place a call, ensure that the Multilink PPP box on the 3C882 ISDN modem Conﬁguration dialog box is checked. The destination you are calling must also support Multilink PPP. For example, if you are trying to dial into the Internet, your Internet service provider must support Multilink PPP in order to successfully place a Multilink PPP call.

Although this is not generally the case, your Internet service provider may require an Endpoint Discriminator Class and an Endpoint Discriminator. The Endpoint Discriminator Class is conﬁgured using S register 82. The Endpoint Discriminator value is conﬁgured using S register 83. Refer to Appendix B for acceptable values.

For automatic placement of a Multilink PPP call, once you have checked the appropriate box in the Conﬁguration dialog box, simply launch the call.

For manual dialing, use terminal emulation software and type the following:

7-4 CHAPTER 7: PLACING AND RECEIVING CALLS

ATD <telephone number>

An example is as follows:

ATD 1 908 555 1212

Some Internet service providers may require you to dial two telephone numbers to place a Multilink PPP call. In this case, the ampersand (&) character is used to dial two telephone numbers.

To automatically dial two telephone numbers, add the following to the dial string of your application software:

In this case, you would type, for example:

ATD 1 908 555 1212 & 1 908 555 1213

Note that if Multilink PPP is disabled (i.e., S 80=0), you can still place a Multilink PPP call without changing the S 80 register value. In the dial string, enter the ﬁrst telephone number, then the ampersand character followed by the second telephone number, as shown in the example above.

Placing a TollMizer Call

The TollMizer feature (also referred to as Switch 56 Permissive or Data Over Voice) allows you to place a data call using a voice channel, saving the extra cost of the data channel. Combining TollMizer with 3ComImpact IQ compression, you can transfer up to 128 Kbps of data for the price of a single voice call.

TollMizer calls may not work properly if placed via long distance carriers.

You can select this feature from the 3C882 ISDN modem’s Conﬁguration dialog box. Once enabled, all outgoing ISDN calls will be TollMizer calls. Note that to place calls to devices which do not support TollMizer, you must disable this feature

3COM ISDN Modem User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLES

ABOUT THIS GUIDE

Introduction

How to Use This Guide

Conventions

INTRODUCTION

3C882 ISDN Modem Features

Easy Installation and Use

High Performance

Protocols

ISDN Standards and Interface

Security

Voice Features

Upgradability

Diagnostics

Warranty

3C882 ISDN Modem Package Contents

Before You Install the 3C882 ISDN Modem

IBM PC or Compatible Requirements

Apple Macintosh Requirements

ISDN Information

Familiarizing Yourself with the 3C882 ISDN Modem

Installing a Serial Cable

Installing the ISDN Cable

Installing Analog Equipment

Installing the Power Cable

CONFIGURATION FOR AN IBM-COMPATIBLE PC RUNNING WINDOWS

Installing the 3C882 Software

Running the SPID Wizard

Running the SPID Wizard Again

Setup Using Windows 95

Setup Using Windows NT 3.5.1 RAS

Setup for Windows NT 4.0

Configure Dial-Up Networking 3-23

Dial Up Networking for Windows 95

Running the Internet Set-Up Wizard

Dial-up Networking for Windows NT 4.0

Setup for 230Kbps

Setting up 230K for Windows NT 3.5.1

Setting up 230K for Windows 95 and Windows NT 4.0

Installing the 3C882 Software

Running the SPID Wizard

Two Telephone Numbers and Two Analog Devices

Set Up Using OT/PPP and Open Transport

Set Up Using FreePPP with Open Transport

ADVANCED CONFIGURATION

QuickSelect

Dynamic Bandwidth Allocation

Auto Answer

Compression

Baud Rate

Changing the Parameter Settings

SUPPLEMENTARY VOICE FEATURES

Supplementary Voice Features

Call Forwarding

ISDN Call Waiting

Troubleshooting

Call Conference

Call Drop

Call Transfer

PLACING AND RECEIVING CALLS

Placing ISDN Data Calls

Placing Calls Automatically

Placing Calls Manually

Placing Multilink PPP Calls

Placing a TollMizer Call