When the PRI card was purchased from Digium, Digium has provided free
technical support for configuring the card.

The lights on the PRI card can be red, amber/green or green. When all is
well they are green.

If Asterisk aborts when you try to start it, there are several things you
can check:

The Linux modules for your Zapata cards have to be loaded in order for the
connections to work. You load the PRI driver, wct4xxp, before you load the
FXS/FXO driver, wctdm.

You also have to execute the program ztcfg to get things to work. If all is
well, when you run ztcfg it should not produce any output unless you
specify verbose output (”ztcfg -vv”). When you run ztcfg, the lights should
change to green, even if Asterisk has not been started.

Loading of the modules may or may not be done automatically by the system.

Digium says it is possible to construct a loop-back plug to test your
PRI card. You do this using an RJ45 plug, connecting pin one to pin four
and pin two to pin five. When the loop-back connector is connected to the
card, the light should turn green. Again, the modules have to be loaded
and possibly ztcfg has to have been run.

The B channels listed in zaptel.conf must agree with the channels listed in
/etc/asterisk/zapata.conf, otherwise Asterisk may abort when you try to
start it. Zapata channels are indexed starting at one rather than zero
(Zap/1, Zap/2, etc.)