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Monitoring LEDs
93
Troubleshooting
Problems Indicated by
LEDs
Table Table 8 lists the states of ISDN LAN Modem LEDs which indicate errors and
also provides possible causes and solutions.
Table 8
Troubleshooting Problems Indicated by LEDs
LED
LED State
Possible Cause
Solution
ALERT LED
ALERT LED remains
lit.
An internal failure.
Notify your reseller or technical support that the ISDN
LAN Modem has failed the self-test.
ALERT LED continues
to flash.
Self test failure or ISDN LAN
Modem is in firmware download
mode.
Power cycle the ISDN LAN Modem. If the ALERT LED
continues to flash, the ISDN LAN Modem has failed the
self test. Contact your network supplier. If the ALERT
LED is not flashing, then the ISDN LAN Modem is now
operating correctly.
Upon power up, both
the ALERT and ISDN
LEDs flash.
A previous firmware download
was not completed successfully.
Download the firmware. Refer to the Readme file
located at
http://www.remoteaccess.3com.com/support/do
cs/lanmodem
for firmware download instructions.
ALERT, ISDN OK, B1,
and B2 LEDs
alternately flash.
Firmware download process was
aborted.
Do not remove power plug.
Wait until the LEDs stop
flashing (about 1 minute) to allow the ISDN LAN modem
to cancel the firmware download. Once the LEDs stop
flashing, you may restart firmware download.
B1/B2
B channel LED(s) do
not remain green or
amber.
Problem with your computer or
application software or
incompatible local or toll
telephone company.
Carefully monitor the B1 and B2 LEDs while attempting
a call. These LEDs flash during call establishment and
then remain green or amber once the connection is
established.
If neither LED flashes, make sure that your computer is
turned on and operational.
If you are able to place a voice call but not a data call,
then there may be an incompatible local or toll
telephone company. Contact your local telephone
company and have it verify that you can dial a data call
to the destination telephone number.
ISDN LED
ISDN LED does not
light.
Poor physical connection to the
local telephone equipment.
Check the cables to ensure that they are securely
connected to the appropriate ports.
If the telephone wires at your site appear to be
satisfactory, call your local telephone company for
assistance.
LAN STATUS
LAN port status LED is
off (that is, not
illuminated).
Ethernet cable is not securely
connected.
Check the Ethernet cable connection and make sure it is
inserted properly in a port labeled 1,2,3,or 4 on the
back of the ISDN LAN Modem and in the Ethernet port
on the back of your computer. Also, your computer
should be turned on and your network software should
be running.
Ethernet card is not set up
properly.
Make sure your Ethernet card is set up properly (proper
drivers are loaded). Refer to the documentation
provided with your Ethernet card for instructions.
Содержание OfficeConnect 3C892A
Страница 1: ...http www 3com com OfficeConnect ISDN LAN Modem User Guide Part No 984 000026 2 Published January 1999 ...
Страница 8: ......
Страница 14: ......
Страница 22: ...16 CHAPTER 1 INTRODUCTION ...
Страница 32: ...26 CHAPTER 2 ISDN LAN MODEM FUNCTIONALITY DESCRIPTION ...
Страница 42: ...36 CHAPTER 3 HARDWARE DESCRIPTION AND INSTALLATION ...
Страница 52: ...46 CHAPTER 4 SETTING UP TCP IP FOR WINDOWS AND MACINTOSH ...
Страница 64: ...58 CHAPTER 5 CONFIGURING THE ISDN LAN MODEM ...
Страница 90: ...84 CHAPTER 7 SUPPLEMENTARY VOICE CALL SERVICES ...
Страница 96: ...90 CHAPTER 8 PLACING RECEIVING AND DISCONNECTING CALLS ...
Страница 114: ...108 APPENDIX A NETWORKING PRIMER ...
Страница 118: ...112 APPENDIX C ISDN LAN MODEM FACTORY DEFAULTS ...
Страница 122: ...116 APPENDIX D ISDN LAN MODEM SPECIFICATIONS ...
Страница 126: ...120 GLOSSARY ...
Страница 128: ...122 INDEX ...