T2xP looses registration when call timeout

[braymond]

Hi Matt,

No I did not solve the issue and have not really pursued it as it was fairly intermittent since my phones are directly connected on the same network as the PBX.

But your test shows exactly the real issue where the phone will force a REGISTER if its dialog (the INVITE in most cases) can't be fully completed.

Your problem looks to be NAT related. When DAHDI is answered, you can see Asterisk sending the 200 OK several times which is probably not even reaching the phone. So the phone has a pending INVITE not completed and then eventually gets the BYE from Asterisk when the call actually fails to be answered. The phone responds with a 481 and probably (my guess here) displays the call timeout and initiate a REGISTER.

It doesn't look like this phone should be anywhere other than on the same network.