asterisk users - Feb 2008 - Able to receive calls on my fxo port and not able to do calls via it

Hi All;

If I succeed to receive calls on my FXO ports (Digium)
and still when I place any outsite calls (via the same
ports) I get busy tone coming from the service
provider, what does that mean?

Already the call is routed successfully to the fxo
port that I can receive on it (I can see that on the
asterisk CLI, and I can see how it is placed on the
channel), but I get busy tone?!! While incoming calls
are coming fine.

Any help?

The region is egypt, any one knows a close signaling
for it?

Regards
Bilal


     
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