Digium TE800 Series, User Manual

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Chapter 4: Troubleshooting
I am having issues with my PRI. How can I see the messages coming
across my D channel?
Enter the following command:
*CLI> PRI debug span X
where X is the port from which you are connected. This command will
show you the PRI messages coming across your D channel for that span.
I am still having problems and the telco tells me it is my equipment.
The first thing to do in this situation is to test your equipment.
Plug in a loopback cable. (A loopback cable is a cable that has pin 1
going to pin 4 and pin 2 going to pin 5.) Plug the cable into the span
and wait for its LED to turn green.
Alternatively, the dahdi_maint utility may be used to place a span into
loopback mode. An example using dahdi_maint to place a span in
loopback mode is provided below.
# dahdi_maint -s <span_number> -l localhost
3.
Stop Asterisk and edit
system.conf
by removing the lines defined for
your card and replacing them with the following:
span => 1,0,0,esf,b8zs
clear = 1-24
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