Thanks Tony.  I did a siptrace and could not see any traffic coming in when 
initiating an external call to that DID.. not even an Invite.  Called ITSP and 
told them this and to check configuration again for this number.  Problem now 
fixed.  T.38 was enabled, but the DID was not assigned to our trunk group. One 
out of 15 not too bad <grin>.

Ly Tran

From: [email protected] 
[mailto:[email protected]] On Behalf Of Tony Graziano
Sent: Tuesday, December 13, 2011 12:55 PM
To: Discussion list for users of sipXecs software
Subject: Re: [sipx-users] Incoming DID Not Working


Let me elaborate...

I see the same problem with providers who do not send rtp on from the same 
address the invite comes from. This usually becomes a problem especially when 
you use more than one wan connection.
On Dec 13, 2011 1:43 PM, "Tony Graziano" 
<[email protected]<mailto:[email protected]>> wrote:

You would need a sip trace to make sure it sends the invite on port 5080 and 
from the expected ip address or gateway with your provider.

Then we would want to make sure it does a proper reinvite for t.38.

I suspect it does not come from the same provider gateway but the best thing to 
do is to get a trace of the call.
On Dec 13, 2011 1:14 PM, "Ly Tran" 
<[email protected]<mailto:[email protected]>> wrote:
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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