[Freeswitch-users] Calls drop after ~1:48

R W wingcomm at hotmail.com
Mon Aug 27 09:10:50 MSD 2012

We're seeing this same exact issue with a number of our phones (specifically CounterPath Bria for iOS and others). Calls placed disconnect after ~1:48 on some NATs, (specifically our wireless data carrier, AT&T 3G).

In freeswitch, the CLI shows:

2012-08-27 00:41:59.471201 [DEBUG] switch_core_session.c:1429 Session 174 (sofia/internal/2000 at mydomain.com) Locked, Waiting on external entities
2012-08-27 00:41:59.471201 [NOTICE] switch_core_session.c:1447 Session 174 (sofia/internal/2000 at mydomain.com) Ended
2012-08-27 00:41:59.471201 [NOTICE] switch_core_session.c:1449 Close Channel sofia/internal/2000 at mydomain.com [CS_DESTROY]
2012-08-27 00:41:59.471201 [DEBUG] switch_core_state_machine.c:514 (sofia/internal/2000 at mydomain.com) Callstate Change HANGUP -> DOWN
2012-08-27 00:41:59.471201 [DEBUG] switch_core_state_machine.c:517 (sofia/internal/2000 at mydomain.com) Running State Change CS_DESTROY
2012-08-27 00:41:59.471201 [DEBUG] switch_core_state_machine.c:527 (sofia/internal/2000 at mydomain.com) State DESTROY
2012-08-27 00:41:59.471201 [DEBUG] mod_sofia.c:374 sofia/internal/2000 at mydomain.com SOFIA DESTROY
2012-08-27 00:41:59.471201 [DEBUG] switch_core_state_machine.c:86 sofia/internal/2000 at mydomain.com Standard DESTROY
2012-08-27 00:41:59.471201 [DEBUG] switch_core_state_machine.c:527 (sofia/internal/2000 at mydomain.com) State DESTROY going to sleep
We fixed this by shutting of the "Passive Session Timer" in the "SIP Miscellaneous." However, I'm curious to know if anyone can explain why this happens on some NATs and not others? Is there s problem with disabling the "Passive Session Timer" on our clients?

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