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3Com ISDN Modem 8 TROUBLESHOOTING, ■Using on-linehelp, ■Checking the basics, ■Monitoring the LEDs, ■Downloading ﬁrmware, ■Identifying error codes, ■Finding more information

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8 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.

Your ISDN line provisioning may also affect your 3C882 ISDN modem’s performance. Refer to Chapter A,“Ordering ISDN Service” for assistance.

This chapter covers the following main topics:■Checking the basics■Monitoring the LEDs■Evaluating symptoms and solutions■Identifying error codes■Using on-line help■Finding more information■Contacting technical support■Downloading ﬁrmware■Microkey driver error codes■Restoring the modem to Autobaud

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

Contents

3COMIMPACTIQ EXTERNAL ISDN MODEM ISDN M USER GUIDE Page 5-YEAR LIMITED WARRANTY Page CONTENTS Page ISDN S AT C , S R DOS FCC C B C FIGURES Page TABLES Page ABOUT THIS GUIDE Introduction How to Use This Guide Conventions 1 INTRODUCTION 3C882 ISDN Modem Features High Performance hi/fn The PPP Compression Control Protocol PPP LZS Compression Protocol (1974) An asynchronous 3C882 ISDN Modem Package Contents Before You Install the 3C882 ISDN Modem IBM PC or Compatible Requirements An IBM-compatiblePC must have the following: ■A 386, 486, or Pentium processor ■640 KB of conventional memory ■A hard disk drive with 4 MB of free space ISDN Information Page INSTALLING THE 3C882 ISDN MODEM Familiarizing Yourself with the 3C882 ISDN Modem Installing a Serial Cable To install the 3C882 ISDN modem serial cable: On a Macintosh computer, the COM port is the mini DIN 8-pinserial connector depicted by the telephone handset 1Installing the ISDN Cable Installing Analog Equipment Insert one 2Insert the other RJ-11end into the appropriate RJ-11port on the analog device 3If you have another analog device to install, repeat steps 1 and Installing the Power Cable This completes the 3C882 ISDN modem installation CONFIGURATION FOR AN IBM-COMPATIBLE PC IBM-C RUNNING WINDOWS Conﬁguring the 3C882 ISDN Modem for a PC To install the 3C882 ISDN modem software: 3Click OK 4Click Next to continue the installation 6Click Yes to review this ﬁle 7Click OK to complete the installation 1Double-clickthe 3ComImpact IQ icon shown in Figure You will see a start message, as shown in Figure 2Enter the ﬁrst telephone number for your ISDN line 3Click Next Page 5Click Finish 6Click OK If you clicked No, the Conﬁguration dialog box will open, as shown in Figure The Conﬁguration dialog box buttons do the following Help Tools Firmware Tests To run the SPID Wizard for a second telephone number: From the Conﬁguration dialog box, check the Enabled A message box appears and asks you to conﬁrm that you want to run SPID Wizard 2Click OK To change the connection speed to 64 Kbps or TollMizer, do the following: 1Select the appropriate radio button (64 Kbps or TollMizer) One Telephone Number and Two Analog Devices Two Telephone Numbers and Two Analog Devices To change the voice call routing setting: ■Layer 1: UP ■SPID 1: Init (if required) ■TEI 1: Number from 64 to ■SPID 2: Init (if required) 3Click Exit to leave the utility This completes the ISDN modem conﬁguration procedure Setup Using Windows The Install From Disk dialog box appears, as shown in 5Click OK The Select Device dialog box appears, as shown in Figure Setup Using Windows NT 3.5.1 RAS 3From the main menu, select Control Panel, and then select Network The Network Settings dialog box appears, as shown in Figure The Remote Access Setup dialog box appears, as shown in Figure 5If a modem is already conﬁgured, select it, and then click Remove 6Click Add The Add Port dialog box appears 7Select a COM port, and then click OK Setup for Windows NT Page The New Modem Manufacture screen will open, as shown in Figure You will only see a 3Com entry if you have previously installed a 3Com modem 5Click Have Disk 6Select 3ComImpact IQ for baud rates of up to 115.2K and click Next 7Select the appropriate COM port to which your modem is connected Conﬁgure Dial-UpNetworking 5Click Conﬁgure The 3ComImpact IQ Properties window opens 6Select the appropriate COM port and maximum speed available for your computer 7Click OK You are returned to the Make New Connection screen Subnet Mask (if required) Primary and Alternate DNS Server address To send and receive e-mailthrough the Internet: E-mailaddress Mail server address The Service Provider dialog box opens 11Click Next The User Name and Password dialog box will open 12Enter your user name and password and click Next 13Conﬁgure as speciﬁed by your ISP and click Next The New Phonebook Entry screen opens, as shown in Figure 2Type a name for your connection, and click Next 3Select “I’m calling the Internet” and click Next 4Enter your ISP’s ISDN access number, and click Next Page 9Check TCP/IP if you are dialing into an ISP for Internet access 10Click the TCP/IP Settings button 11Click OK to return to the Phonebook Entry screen Script None Setup for 230Kbps 4From the Main menu, select Control Panel, then select Network The Network Settings dialog box appears 6Click Conﬁgure 7Select 3ComImpact IQ 230K 9Change the setting of your application program to 230400 bps 3C882 ISDN modem. This will set the baud rate to 230.4 Kbps 4From the Control Panel dialog box, double click the Modems icon 5Click Add The Install New Modem dialog box appears The dialog box listing modem manufacturers and modem models appears Page Page 4 APPLE MACINTOSH COMPUTER Conﬁguring the 3C882 ISDN Modem for a Macintosh Computer To install the 3C882 ISDN modem software in an Apple Macintosh computer: A message box appears as shown in Figure 2Click Continue The Readme ﬁle opens. You can choose to review the document or print the ﬁle This completes the software installation 1Double-clickthe 3ComImpact IQ program icon shown in Figure The Select Modem Port screen appears, as shown in 2Select the port to which the 3C882 ISDN modem is connected and then click OK the SPID Wizard is the recommended method for conﬁguring your SPID values 4Enter the ﬁrst telephone number for your ISDN line and then click Next If you have a second telephone number for your ISDN line, enter it and click A message box indicates that the conﬁguration was successful 6Click Done Update Conﬁguration Update Firmware. Refer to the readme ﬁle for ﬁrmware download instructions Quit. Click Quit to leave the Conﬁguration dialog box By default, Multilink PPP is enabled. To enable or disable Multilink PPP, do the following: Page Two Telephone Numbers and Two Analog Devices Page Conﬁguring Internet Access for a Macintosh Computer Page Page 6Open 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 Choose PPP Using PPP Server Set Up Using FreePPP with Open Transport These instructions are for FreePPP Open FreePPP Setup The FreePPP Setup screen opens as shown in Figure The Account screen will open as shown in Figure 3Conﬁgure the ﬁelds as speciﬁed by your Internet service provider 4Click the Connection tab at the top of the Account screen The Connection conﬁguration screen will open as shown in.Figure Choose the maximum COM port rate available for your computer, and then select CTS & RTS (DTR) Use Multilink PPP calls may also be designated via the Conﬁguration dialog box 8Click Open TCP/IP to access the TCP/IP control panel shown in Figure 9Choose FreePPP from the Connect via pop up menu 5 ADVANCED CONFIGURATION Advanced Conﬁguration Parameter Default Values is used for communication between a computer and an Internet service provider Dynamic Bandwidth Allocation Auto Answer Compression Baud Rate Changing the Parameter Settings Page Page SUPPLEMENTARY VOICE FEATURES Supplementary Voice Features telephone company should provide the appropriate commands ISDN Call Waiting Call Conference Call Drop Call Transfer ISDN Service from Paciﬁc Bell 2Launch your terminal emulation software You will need to change the values of S registers 77, 78, and 3Send the following command to the 3C882 ISDN modem: This completes the procedure for Paciﬁc Bell ISDN users PLACING AND RECEIVING CALLS Placing ISDN Data Calls Placing Calls Automatically Placing Calls Manually Follow these steps to use AT commands: 1Launch your communications software circuit-switchedISDN modem commands with dial strings are: AT D 1 408 654 ATD14086542703 For a summary of the AT command set, see Appendix B After completing its tasks, the 3C882 ISDN modem sends a message to the screen An example is as follows: ATD 1 908 555 In this case, you would type, for example: ATD 1 908 555 1212 & 1 908 555 Placing a TollMizer Call Receiving ISDN Data Calls Placing Voice Calls Using an Analog Phone Port Receiving Voice Calls Using an Analog Phone Port ISDN Call Logging Page 8 TROUBLESHOOTING Checking the Basics Monitoring LEDs Monitoring the D Channel LED Monitoring the B Channel LEDs Monitoring the SD LED Monitoring the RD LED Evaluating Symptoms and Solutions Page Page Page Microkey Error Codes Restoring the 3C882 ISDN Modem to Autobaud Using On-LineHelp Finding More Information Downloading Firmware to Your 3C882 ISDN Modem A ORDERING ISDN SERVICE ISDN S Placing the ISDN Order Through 3Com Placing the ISDN Order Through Your Telephone Company To order the ISDN service from the telephone company for the 3C882 ISDN modem: 1Call the telephone company and ask for the ISDN representative IOC S1 provides circuit switched voice and data on both What Do I Need To Support Supplementary Voice Features ISDN Line Parameter Tables AT&T 5ESS Switch NI1 AT&T 5ESS Custom Switch NorthernTelecomDMS 100 Switch Siemens EWSD Switch AT COMMANDS AT C B S REGISTERS, AND RESULT CODES AT Command Set Page Page S Registers Page Page Page Page Result Codes Page C SPECIFICATIONS 3C882 ISDN Modem Speciﬁcations RS-232COM Port Pin Speciﬁcations PC Serial Cable Pin Speciﬁcations Macintosh Serial Cable Pin Speciﬁcations Page CONFIGURATION USING DOS Conﬁguration Using DOS 4Use the [Space Bar] to select the 3C882 ISDN modem’s COM port 5Press [F10] to connect to the 3C882 ISDN modem via the chosen COM port The Conﬁguration screen appears 6Select the ISDN switch type Your telephone company can provide this information 13Conﬁrm that the parameters listed in steps 6 through 12 are correct 14Press [F10] to update the information in the ISDN modem Page GLOSSARY CHAP COM port D channel DBA Default Firmware ISDN Kbps Layer Multilink PPP National ISDN Network terminator (NT1) PAP POTS Plain old telephone service TollMizer 56 Kbps or 64 Kbps rate. V.120 is used for communication between two computers Page Numerics