Troubleshooting, Checking the Basics | 3Com 3C882 specification

7 TROUBLESHOOTING

This chapter explains how to isolate and solve problems encountered with the 3C882 ISDN modem. Problems may stem from incorrect option settings or improper installation.

This chapter covers the following main topics:

■Checking the basics

■Monitoring the LEDs

■Evaluating symptoms and solutions

■Using on-line help

■Finding more information

■Contacting technical support

■Downloading Firmware

There are no user-serviceable parts inside your 3C882 ISDN modem. Unauthorized opening of the unit will void the warranty.

Checking the Basics

Before you monitor the LEDs or refer to the section on symptoms and solutions, check the following:

■Verify that the cables are not physically damaged. If damage is apparent, replace the cable.

■Verify that the power cord is connected to the 3C882 ISDN modem and an electrical outlet.

Image 72

3Com 3C882 manual Troubleshooting, Checking the Basics

Contents

3COMIMPACT IQ External Isdn Modem User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Year Limited Warranty Contents Conﬁguring Multilink PPP Placing Isdn Data Calls AT&T 5ESS Custom Switch A-4 Registers World Wide Web Site Support from 3Com E-4 Returning Products for Repair E-4 Figures Main 3C882 Conﬁguration Steps for a Macintosh Tables Pin Descriptions How to Use This Guide Advanced configuration ChapterAbout this Guide Introduction Conventions Network Access with the 3C882 Isdn Modem Introduction 3C882 Isdn Modem Features Easy Installation and Use3C882 Isdn modem provides the following features High Performance ProtocolsIsdn Standards and Interface Ansi V.120 rate adaption Voice Features DiagnosticsWarranty Security 3C882 Isdn Modem Package Contents Before You Install the 3C882 Isdn Modem IBM PC or Compatible Requirements Apple Macintosh Requirements Isdn Switch Type Isdn InformationIsdn Information Sheet 3ComImpact IQ Isdn Modem Before You Install the 3C882 Isdn Modem Installing the 3C882 Main hardware installation steps are depicted Front Panel LED Indicators Familiarizing Yourself with the 3C882 Isdn Modem Front Panel LED Indicator Deﬁnitions As power is supplied to the unitColor Description Green Installing a Serial Cable You will need the following type of serial cable Installing the Isdn Cable Installing Analog Equipment Analog Equipment Connection Installing Analog Equipment Installing the Power Cable Power Cable Connection Configuration for AN IBM-COMPATIBLE PCConﬁguring the 3C882 Isdn Modem for a PC Main steps are shown in Figure Installing the 3C882 Software To install the 3C882 Isdn modem softwareClick OK Running Spid Wizard Double-click the 3ComImpact IQ 3.0 icon shown in FigureYou will see a start message, as shown in Figure First Telephone Number Dialog Box for PC Second Telephone Number Dialog Box for PC Click Finish Conﬁguration dialog box buttons do the following Configuring the 3C882 Isdn Modem for a PC Conﬁguring Multilink PPP Appears Click Finish Conﬁguring the B Channel Rate Conﬁguring Voice Call Routing Configuring the 3C882 Isdn Modem for a PC Verifying the Conﬁguration 11 Conﬁguration for One Telephone Number & Two Devices Configuring the 3C882 Isdn Modem for a PC Setup Using Windows 12 New Hardware Dialog Box 13 Install From Disk Dialog Box 15 Install New Modems Dialog Box 16 Modem Manufacturers and Models Dialog Box Setup Using Windows NT RAS 17 Network Settings Dialog Box 18 Remote Access Setup Dialog Box Remote Access Setup dialog box appears Conﬁgure Port dialog box appears Configuration for AN Apple Macintosh Computer Conﬁguring the 3C882 Isdn Modem for a Macintosh Computer Message box appears Click Continue. -3 appears Click OK This completes the software installation procedure Click Continue. -4 appears 3ComImpact IQ Program Icon Select Modem Port Screen Spid Wizard Start Screen 10 First Telephone Number Screen for Macintosh 11 Second Telephone Screen for Macintosh 12 Successful Conﬁguration Screen Quit. Click Quit to leave the Conﬁguration dialog box Configuring the 3C882 Isdn Modem for a Macintosh Computer 15 Conﬁguration for One Telephone Number per Device Verifying the Conﬁguration Configuring the 3C882 Isdn Modem for a Macintosh Computer Advanced Configuration Advanced Conﬁguration Parameter Default Values DBA Auto Answer Baud Rate Changing The Parameter Settings Send the command AT $B 230400 to the 3C882 Isdn modem Auto Answer Disabled Autobaud EnabledType Answer Placing and Receiving CallsPlacing Isdn Data Calls Placing Calls Automatically Placing Calls Manually Placing Multilink PPP Calls Placing a 56K TollSaver Call An example is as follows ATD 1 908 555 1212 & 1 908 555 When the 3C882 Isdn modem receives a voice call, Receiving Isdn Data CallsAn example is as follows Atdd 1 908 555 Channels ﬂash and then remain lit Placing Voice Calls Using an Analog Phone Port Receiving Voice Calls Using an Analog Phone Port Troubleshooting Checking the Basics Monitoring LEDs Monitoring the Test LEDMonitoring the D Channel LED Evaluating Symptoms and Solutions Monitoring the B Channel LEDs Symptom Possible Cause Solution LED remains lit Properly configured You receive aCannot be sent Upon power up Previous firmware Do not remain Or application software or Using On-Line Help Finding More Information Contacting Technical SupportDownloading Firmware to Your 3C882 Isdn Modem Following on-line help is available Ordering Isdn Service Placing the Isdn Order Through 3ComPlacing the Isdn Order Through Your Telephone Company Give the representative the 3C882 Isdn modem Isdn code Table A-1 Isdn Order Codes Number of Telephone Numbers Package K Package U Switch Circuit-switched DataTelephone company with the information provided Table A-2 Switch To order Isdn service for the Northern Telecom DMS Switch, supply the telephone company with the informationProvided in Table A-4 Dynamic Ewsd Key System Ekts Flexible Call Offering FCO Yes † AT Commands REGISTERS, and Result Codes AT Command Set Host computer default Answer mode only\Q0 disables flow control Hardware flow control default Settings AT \S Reset AT Z+++ Enter command state \T0 disables inactivity timer default Registers Registers except S0 are the 3Com extended registers Isdn Default S65 Isdn Caller ID for Voice Calls for Phone Port S75 Connection Delay Result Codes Table B-3 lists the 3C882 Isdn modem result codes Specifications 3C882 Isdn Modem Speciﬁcations RS-232 COM Port Pin Speciﬁcations Clear to Send CTS From Isdn modem PC Serial Cable Pin Speciﬁcations Macintosh Serial Cable Pin SpeciﬁcationsReceive Data RD Send Data SD Configuration Using Conﬁguration Using DOSTo copy the README.TXT ﬁle, at the C\3Com prompt, type Use the Space Bar to select the 3C882 Isdn modem’s COM port Configuration Using DOS On-line Technical Services 3Com Bulletin Board ServiceTechnical Support World Wide Web Site Call the telephone number nearest you 3ComFacts Automated Fax Service 3ComForum on CompuServeTo use 3ComForum Log on to CompuServe Press Return to see the 3ComForum main menu U.S. and Canada, call 800 876 3266 for customer service Support from Your Network SupplierSupport from 3Com Returning Products for Repair Glossary Async-Sync PPP ConversionChannel COM port Isdn Layer Plain old telephone service 120 Analog equipment installation 2-6 analog port IndexNumerics Apple macintosh requirements 1-6 Async-Sync PPP Data Using AT commands 6-2 voice Registers B-4 Serial cable installationDMS 100 A-5 Result codes B-8 Index Limited Warranty Santa Clara, CA 95052-8145 408 3COM END User Software License Agreement For civilian agencies Interference Handbook Canadian Notice  1996, 3Com Corporation