3Com 3C892 manual LEDs, LED State Possible Cause Solution, B1/B2

Monitoring LEDs 93

Troubleshooting Table Table 5 lists the states of ISDN LAN Modem LEDs which indicate errors and Problems Indicated by also provides possible causes and solutions.

LEDs

Table 5 Troubleshooting Problems Indicated by LEDs

LED	LED State	Possible Cause	Solution
ALERT LED	ALERT LED remains	An internal failure.	Notify your reseller or technical support that the ISDN
	lit.		LAN Modem has failed the self-test.
	ALERT LED continues	Self test failure or ISDN LAN	Power cycle the ISDN LAN Modem. If the ALERT LED
	to flash.	Modem is in firmware download	continues to flash, the ISDN LAN Modem has failed the
		mode.	self test. Contact your network supplier. If the ALERT
			LED is not flashing, then the ISDN LAN Modem is now
			operating correctly.

ISDN LAN Modem has received new voice mail messages.

DHCP server is full and cannot assign any more IP addresses

Lift the telephone handset and listen for the stutter tone that indicates new messages are waiting for you.

Release the last IP address assigned by pressing **3265# from a telephone connected to a LAN Modem phone port

	Upon power up, both
	the ALERT and ISDN
	LEDs flash.
	ALERT, ISDN OK, B1,
	and B2 LEDs
	alternately flash.
B1/B2	B channel LED(s) do
	not remain green or
	amber.

ISDN LED ISDN LED does not light.

ISDN LED continues to flash for more than a few minutes

LAN STATUS LAN port status LED is off (that is, not illuminated).

A previous firmware download was not completed successfully.

Firmware download process was aborted.

Problem with your computer or application software or incompatible local or toll telephone company.

Poor physical connection to the local telephone equipment.

A mismatch between the settings of the ISDN line and the ISDN LAN Modem configuration.

Ethernet cable is not securely connected.

Download the firmware. Refer to

http://www.remoteaccess.3com.com/support/ docs/lanmodem/welcome.html for firmware

download instructions.

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.

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.

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.

Check the ISDN statistics screen to determine whether the SPIDs are properly configured. If not, go to the ISDN Parameters screen to enter the correct SPIDs.

Call the telephone company and have it verify that your line is configured for circuit-switched voice and data service.

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.