Dears;

I am facing the following problem:

Already we requested from the service provider to enable the auto jumping 
service for our analoge telephone lines, so because we have 4 telephone lines 
from the service provider, then if you called line # 1 and it was busy, then 
the call will be sent to any available line #2 or #3 or #4, and if you call 
line # 3 and it was busy then the call will be sent via any available line of 
these four lines.

This feature is causing a problem at the Asterisk PBX, so some calls are not 
handled properly (it is ringing and we do not hear the welcome message), also 
the outgoing calls are facing a problem because it seems that there is a 
confusing happening in dahdi to determine the available line.

I do not know really how the automatic jumping feature is working at the 
service provider and what is the effecting on the DAHDI and Asterisk that is 
causing to not responding for the DAHDI channels properly.

For more details to be sure that I described the behaviour of the auto jumping 
feature that I took it from the service provider, let us assume my number is 
22446789, when I call this number and I look for asterisk CLI, I can see that 
the call came via DAHDI/3-1 and then I do another call to this line, I can see 
it via DAHDI/4-1 and I do another call to this line and I will see it via 
DAHDI/2-1.

Also, not all my calls are failed ... but some are succeed and some are fails, 
so the responding is not perfect. I am sure because of the auto jumping feature 
from the service provider. 

Appreciate the kindly help and advise.

Regards
Bilal

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