Troubleshooting And Maintenance; Checking The Basics - 3Com OfficeConnect 3C892 User Manual

9

Checking the Basics

T
ROUBLESHOOTING AND
M
AINTENANCE
This chapter explains how to isolate and solve problems encountered with the
ISDN LAN 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
Finding more information
Contacting technical support
Downloading firmware
Resetting the ISDN LAN Modem
Reviewing statistics
CAUTION: There are no user-serviceable parts inside your ISDN LAN Modem.
Unauthorized opening of the unit will void the warranty.
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 you have a proper 10BASE-T Ethernet cable (8-pin to 8-pin)
Verify that the power cord is connected to the ISDN LAN Modem and an
electrical outlet.
Verify that the ISDN cable is properly connected to the ISDN LAN Modem
and the ISDN wall outlet.
The ISDN LAN Modem will not operate if connected to an analog telephone wall
jack. Make sure that the ISDN LAN Modem is connected directly into the ISDN wall
outlet without connection to any intermediate telephone equipment (an NT1
device is not required with the ISDN LAN Modem).