8TROUBLESHOOTING AND
MAINTENANCE
This chapter explains how to isolate and solve problems encountered with the 56K
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 56K LAN Modem
■Reviewing statistics
CAUTION: There are no user-serviceable parts inside your 56K LAN Modem.
Unauthorized opening of the unit will void the warranty.
Checking the Basics Before you monitor the LEDs or refer to the symptoms and solutions section,
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 56K LAN Modem and an
electrical outlet.
■Verify that the analog telephone cable is properly connected to the 56K
LAN Modem and the telephone wall outlet.
Monitoring LEDs If you are experiencing operational inconsistencies, you can monitor the ALERT
and LAN port status LEDs to isolate problems.
Monitoring the ALERT
LED Power cycle the 56K LAN Modem and observe the ALERT LED. During the
power-up self-test, the ALERT LED will remain lit.
■If the ALERT LED turns off, the test has been successful.
■If the ALERT LED flashes for more than several seconds, it is either in firmware
download mode or there is an internal failure. If the 56K LAN Modem is not in
firmware download mode, notify your reseller that the 56K LAN Modem has
failed the self-test and order a replacement.