Digital Line Card Troubleshooting - 3Com 3C10402B Administrator's Manual

Digital Line Card
Troubleshooting
Table 80 Troubleshooting Actions (continued)
Symptom Possible Cause
All greetings The wrong
and prompts message
are missing. For compression
example, format was
calling the Auto selected.
Attendant or a
user's mailbox
produces
silence instead
of the expected
greetings.
Caller ID Your local
information is telephone
not appearing company is not
when an providing Caller ID
outside call service to you.
arrives.
You are
answering the
telephone before
the Caller ID
information is fully
received.
To troubleshoot a Digital Line Card correctly, determine whether the
origin of the problem is:
The hardware
■
The software configuration
■
The CSU (Channel Service Unit)
■
The telephone company's line
■
To eliminate the Digital Line Card (T1 or E1) attach a loop back connector
in place of the telephone company's line. Configure the card as described
in the appropriate section of
The 3C10116D T1 card and 3C101156D E1 card can respond to
commands from the Central Office to loop back data at different points
for diagnostic purposes. You enable each loopback test using the NBX
NetSet utility. You initiate the Local and Framer loopback tests using the
NBX NetSet utility. The Line and Payload loopback tests must be initiated
System-level Troubleshooting
Suggested Action
Prior to R1.1.0, all audio used MuLaw
compression. With R1.1.0, audio, that is, any
prompt, message, or greeting, was recorded
using ADPCM compression. If you are running
R1.1.0 or higher, leave the compression format
set to ADPCM. The ability to select the format
allows you to migrate existing data into an
older database for backwards compatibility.
In release R2.6 and all later releases, the
compression is set to ADPCM and you cannot
change it.
Caller ID is typically an optional service which
you must order from your telephone company.
You might be able to see caller ID by number
or by name (or both) depending on the service
your telephone company provides.
Caller ID information does not appear
immediately. It usually appears between the
first and second rings. If you answer the call
too quickly, the information is never received.
If you transfer the call, the person you transfer
the call to sees your ID instead of the ID of the
original caller.
Chapter 5.
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