[Freeswitch-users] Call drops after 30 seconds

Wed Jun 22 16:44:15 MSD 2011

My two cents worth...

I have fixed this in the past by setting up a STUND server to help with the
SIP data. I had the same problem as you, 30 seconds on the dot the call
would drop. After pointing my sip devices to a stun server everything is
solved. (for me anyway :)

HTH

Matt

On 22 June 2011 22:38, Matthew Ralston <freeswitch at mralston.com> wrote:

> Hi,
>
> I'm having a problem at the moment with calls being successfully set up,
> with two-way audio, being terminated by FreeSWITCH after 30 seconds.
>
> Internal calls (i.e. between SIP phones on the same LAN segment as the
> FreeSWITCH box) work flawlessly.
>
> The problem arises when at least one of the handsets is located elsewhere
> on the Internet. This behaviour is exhibited under the following
> circumstances:
>
> - A-leg only call, e.g. to voicemail when the handset is at another
> location on the Internet
> - A-leg-B-leg call if one or both of the handsets are at another location
> on the Internet
> - Inbound calls from our external SIP provider
> - Outbound calls to our external SIP provider
>
> So it is obvious that the problem is related to the SIP going via the
> Internet, but I'm having trouble understanding why.
>
> Whilst debugging this problem I have placed the FreeSWITCH box is in the
> DMZ on our router, so there should not be any ports blocked. The FreeSWITCH
> box itself is not running a software firewall.
>
> The calls themselves are absolutely fine for the first 30 seconds - each
> party can hear the other talking fine.
>
> The fact that the call is consistently dropped after 30 seconds (give or
> take a second or two for PDD) suggests that some timeout is being triggered.
>
> When FreeSWITCH terminates the call, the following is logged to the
> console:
>
> 2011-06-22 13:33:50.514941 [DEBUG] sofia.c:4787 Channel
> sofia/internal/1006 at public.ip.removed entering state [terminating][0]
> 2011-06-22 13:33:50.514941 [DEBUG] switch_channel.c:2641
> (sofia/internal/1006 at public.ip.removed) Callstate Change ACTIVE -> HANGUP
> 2011-06-22 13:33:50.514941 [NOTICE] sofia.c:5508 Hangup
> sofia/internal/1006 at public.ip.removed [CS_EXECUTE] [NORMAL_UNSPECIFIED]
> 2011-06-22 13:33:50.514941 [DEBUG] switch_channel.c:2657 Send signal
> sofia/internal/1006 at public.ip.removed [KILL]
> 2011-06-22 13:33:50.514941 [DEBUG] switch_core_session.c:1118 Send signal
> sofia/internal/1006 at public.ip.removed [BREAK]
> 2011-06-22 13:33:50.534966 [DEBUG] switch_ivr_play_say.c:1649 done playing
> file
> 2011-06-22 13:33:50.625988 [DEBUG] switch_ivr_play_say.c:244 Handle
> play-file:[voicemail/vm-press.wav] (en:en)
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_session.c:2063
> sofia/internal/1006 at public.ip.removed skip receive message
> [APPLICATION_EXEC_COMPLETE] (channel is hungup already)
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_state_machine.c:371
> (sofia/internal/1006 at public.ip.removed) State EXECUTE going to sleep
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_state_machine.c:325
> (sofia/internal/1006 at public.ip.removed) Running State Change CS_HANGUP
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_state_machine.c:565
> (sofia/internal/1006 at public.ip.removed) State HANGUP
> 2011-06-22 13:33:50.727027 [DEBUG] mod_sofia.c:458 Channel
> sofia/internal/1006 at public.ip.removed hanging up, cause:
> NORMAL_UNSPECIFIED
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_state_machine.c:46
> sofia/internal/1006 at public.ip.removed Standard HANGUP, cause:
> NORMAL_UNSPECIFIED
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_state_machine.c:565
> (sofia/internal/1006 at public.ip.removed) State HANGUP going to sleep
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_state_machine.c:356
> (sofia/internal/1006 at public.ip.removed) State Change CS_HANGUP ->
> CS_REPORTING
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_session.c:1118 Send signal
> sofia/internal/1006 at public.ip.removed [BREAK]
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_state_machine.c:325
> (sofia/internal/1006 at public.ip.removed) Running State Change CS_REPORTING
> 2011-06-22 13:33:50.727027 [DEBUG] switch_core_state_machine.c:625
> (sofia/internal/1006 at public.ip.removed) State REPORTING
> 2011-06-22 13:33:50.740064 [DEBUG] switch_core_state_machine.c:53
> sofia/internal/1006 at public.ip.removed Standard REPORTING, cause:
> NORMAL_UNSPECIFIED
> 2011-06-22 13:33:50.740064 [DEBUG] switch_core_state_machine.c:625
> (sofia/internal/1006 at public.ip.removed) State REPORTING going to sleep
> 2011-06-22 13:33:50.740064 [DEBUG] switch_core_state_machine.c:350
> (sofia/internal/1006 at public.ip.removed) State Change CS_REPORTING ->
> CS_DESTROY
> 2011-06-22 13:33:50.740064 [DEBUG] switch_core_session.c:1118 Send signal
> sofia/internal/1006 at public.ip.removed [BREAK]
> 2011-06-22 13:33:50.740064 [DEBUG] switch_core_session.c:1290 Session 5
> (sofia/internal/1006 at public.ip.removed) Locked, Waiting on external
> entities
> 2011-06-22 13:33:50.740064 [NOTICE] switch_core_session.c:1308 Session 5
> (sofia/internal/1006 at public.ip.removed) Ended
> 2011-06-22 13:33:50.740064 [NOTICE] switch_core_session.c:1310 Close
> Channel sofia/internal/1006 at public.ip.removed [CS_DESTROY]
> 2011-06-22 13:33:50.740064 [DEBUG] switch_core_state_machine.c:454
> (sofia/internal/1006 at public.ip.removed) Callstate Change HANGUP -> DOWN
> 2011-06-22 13:33:50.740064 [DEBUG] switch_core_state_machine.c:457
> (sofia/internal/1006 at public.ip.removed) Running State Change CS_DESTROY
> 2011-06-22 13:33:50.740064 [DEBUG] switch_core_state_machine.c:467
> (sofia/internal/1006 at public.ip.removed) State DESTROY
> 2011-06-22 13:33:50.740064 [DEBUG] mod_sofia.c:363
> sofia/internal/1006 at public.ip.removed SOFIA DESTROY
> 2011-06-22 13:33:50.780056 [DEBUG] switch_nat.c:570 unmapped public port
> 31484 protocol UDP to localport 31484
> 2011-06-22 13:33:50.840070 [DEBUG] switch_nat.c:570 unmapped public port
> 31485 protocol UDP to localport 31485
> 2011-06-22 13:33:50.840070 [DEBUG] switch_core_state_machine.c:60
> sofia/internal/1006 at public.ip.removed Standard DESTROY
> 2011-06-22 13:33:50.840070 [DEBUG] switch_core_state_machine.c:467
> (sofia/internal/1006 at public.ip.removed) State DESTROY going to sleep
>
> The above example was from an externally situated SIP phone ringing
> voicemail (4000) on FreeSWITCH.
>
> I have experimented changing various timers and timeouts in the config of
> FreeSWITCH (one at a time, being careful to put them back afterwards!) but
> been unable to resolve the issue.
>
> Incidentally, we have no long term intention of running off-site SIP phones
> with the PBX and I'm hoping not to have to leave it in the DMZ either, it's
> just like that for debugging. What is a real issue is the calls to our
> external SIP provider (i.e. outbound calls) being dropped.
>
> Any suggestions would be greatly appreciated.
>
> Thanks,
>
> Matthew Ralston
> Web Developer & IT Consultant
>
> matt at mralston.co.uk
> www.mralston.com
>
>
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