Section 39: Troubleshooting Tips
T
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Page 344
T E C H N O L O G Y
39.2.
ISDN Troubleshooting (See the ISDN section for more
details about connecting over ISDN)
1.
First, if you have an ISDN line connected to your ISDN module, ensure that
you have “SYNC” displayed on the LCD next to the line you wish to connect
with – as displayed in the following image.
If not ensure you have an ISDN service available.
2.
Following is a checklist for you to go through in order to check the
ISDN
setup menu items one by one. Double check that all the information has been
entered exactly as provided by the phone company and matches to the ISDN
setup guide above. Here is the list:
Setup Item
Your Entered value
Correct?
ISDN AutoAnswer
ISDN Network
ISDN Line Type
ISDN Interface
ISDN 56K Dial
Local SubAddress
SPID1
DN1/MSN1
SPID2
DN2/MSN2
Table 21: ISDN Connection Checklist
3.
Unplug the ISDN line and leave it unplugged. Turn the codec off, pause and
turn it back on. Wait about a minute, or until you see
ISDN No Line
on the
LCD
codec screen. Plug in the ISDN line again and wait for
ISDN Line
Ready
.
4.
You can sometimes get a line working without the proper SPIDs by dialing
into it. It is a temporary fix and the line will fail next time the codec is booted.
5.
If your ISDN line has two B channels, try to ring each codec from itself. It
must get connected instantly and remain connected for a few seconds. This
way you can see which side the problem is from.
ManDflt MonoPgm
[ISDN1> Enter# Sync]
ISDN2> Enter# Sync
Aud Menu