Have you tried your PSTN provider at the CO level? To me it seems to be a 
DID issue.
Solomon



From:   Ly Tran <[email protected]>
To:     "[email protected]" <[email protected]>
Date:   12/13/2011 01:14 PM
Subject:        [sipx-users] Incoming DID Not Working
Sent by:        [email protected]



We have an unusual problem with one of our DIDs not working correctly and 
cannot seem to figure out.  If someone have experienced this before or can 
point me in the right direction, it would be appreciated.  We have the 
most current sipx version loaded.  PBX has been restarted.  All other DIDs 
works correctly for incoming/outgoing calls.  This one DID was used as a 
t.38 fax alias and had been working properly, until now and cannot receive 
any faxes.  We have 14 other DIDs used for f t.38 faxing and they work 
fine.  In testing, we removed this DID from the fax alias and assigned it 
to a user/phone.  We can dial the phone internally using the extension and 
dial outbound calls, but cannot receive incoming to this DID.  Dialing 
this number externally only gets ?dead air?.  The PBX does not seem to 
pick up the call and route.
 
Ly Tran
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