The usual reason is re-INVITES being ignored by the other end. Freeswitch periodically sends a reinvite to check the channel is still live, if it does not recieve a response it hangs up the call. This can be cause either bad NAT or bad proxy configuration.<br>
<br><div class="gmail_quote">On 21 March 2013 22:38, Steven Schoch <span dir="ltr">&lt;<a href="mailto:schoch+freeswitch.org@xwin32.com" target="_blank">schoch+freeswitch.org@xwin32.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">One of my users (the one who uses the phone the most) has reported several times since switching to VoIP that sometimes calls are getting disconnected unexpectedly.  Since this is intermittent, the only way I can debug it is looking through the log.  Here are the entries when today&#39;s call got disconnected (I changed his number to 4085551212 in this log):<div>

<br></div><div><div>2013-03-21 09:53:47.420473 [DEBUG] switch_core_session.c:975 Send signal sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a> [BREAK]</div><div>
2013-03-21 09:53:47.440473 [DEBUG] switch_channel.c:3011 (sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a>) Callstate Change ACTIVE -&gt; HANGUP</div>
<div>2013-03-21 09:53:47.440473 [NOTICE] sofia.c:711 Hangup sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a> [CS_EXCHANGE_MEDIA] [NORMAL_CLEARING]</div><div>2013-03-21 09:53:47.440473 [DEBUG] switch_channel.c:3034 Send signal sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a> [KILL]</div>

<div>2013-03-21 09:53:47.440473 [DEBUG] switch_core_session.c:1310 Send signal sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a> [BREAK]</div><div>2013-03-21 09:53:47.440473 [DEBUG] switch_ivr_bridge.c:597 BRIDGE THREAD DONE [sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a>]</div>

<div>2013-03-21 09:53:47.440473 [DEBUG] switch_ivr_bridge.c:622 Send signal sofia/external/+<a href="mailto:19259639530@flowroute.com" target="_blank">19259639530@flowroute.com</a> [BREAK]</div><div>2013-03-21 09:53:47.440473 [DEBUG] switch_core_state_machine.c:480 (sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a>) State EXCHANGE_MEDIA going to sleep</div>

<div>2013-03-21 09:53:47.440473 [DEBUG] switch_core_state_machine.c:415 (sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a>) Running State Change CS_HANGUP</div><div>
2013-03-21 09:53:47.440473 [DEBUG] switch_core_state_machine.c:676 (sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a>) State HANGUP</div>
<div>2013-03-21 09:53:47.440473 [DEBUG] mod_sofia.c:503 Channel sofia/phone/<a href="mailto:sip%3A4085551212@192.168.4.244" target="_blank">sip:4085551212@192.168.4.244</a> hanging up, cause: NORMAL_CLEARING</div></div><div>
<br></div><div>
I&#39;m assuming this mean that the internal user (who&#39;s phone is 192.168.4.244) hung up, but he tells me he didn&#39;t.  He was just talking and then there was no answer.  I&#39;m not sure where to look next.  Any idea?</div>
<span class="HOEnZb"><font color="#888888">
<div><br></div><div>-- </div><div>Steve</div></font></span></div>
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