Evaluating Symptoms and Solutions

7-3

Monitoring the B Channel LEDs

Attempt to place a call and observe the B channel LED(s). The B1 and B2 LEDs flash amber for a voice call or green for a data call during the call establishment phase. They then remain continuously amber or green once the connection is established. If they do not remain continuously amber or green, refer to the “Evaluating Symptoms and Solutions” section.

Evaluating Symptoms and Solutions

Table 7-1 lists symptoms of common problems, possible causes, and possible solutions.

Table 7-1 Symptoms, Causes, and Solutions

Symptom

Possible Cause

Solution

 

 

 

TEST LED remains

An internal failure.

Notify 3Com Technical Support that

lit for more than a

 

the 3C882 ISDN modem has failed the

few minutes

 

self-test.

D channel remains

Poor physical connection to

If the telephone wires at your site

lit for more than a

the local telephone company.

appear to be satisfactory, call your

few minutes

 

local telephone company for repair of

 

 

telephone company equipment and

 

 

troubleshooting assistance.

D channel

A mismatch between the

continues to flash

settings of the ISDN line and

for more than a

the 3C882 ISDN modem

few minutes

configuration.

Verify the telephone number and SPID (if required). If the D channel LED continues to flash, call your telephone company to verify the SPID and telephone number and ensure that the telephone company has configured the ISDN line properly (refer to Appendix A).

Calls cannot be

If you cannot place a calls,

placed from

there may be a problem with

analog equipment

the configuration of your

 

ISDN line.

 

Calls from that analog port

 

may be blocked.

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

From the Configuration dialog box, check the Phone Port 1 and Phone Port 2 boxes which are used for voice call routing. Ensure that the correct Phone Port box for that port is checked.

(continued)

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3Com 3C882 manual Evaluating Symptoms and Solutions, Monitoring the B Channel LEDs