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<p class="MsoNormal">FreeSWITCH Version 1.8.5-6-31281a0bf1~64bit (-6-31281a0bf1 64bit)
<o:p></o:p></p>
<p class="MsoNormal">The server is offsite and not NATed, the phones are NATed.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My customer got some Mitel 6867i phones. They are working fine 95% of the time. We have narrowed it down we think but this may be anecdotal based on limited data. It appears to only happen when a call is originated from these Mitel phones.
Cisco phones at the same site are rock solid. The customer reports “dropped calls”. I got a Mitel 6867i and tested.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">After 44 test calls, I got a dropped call within seconds of being answered. Another instance where user actually gave me enough information to track it down showed the exact same thing - hangup after 7 seconds.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is a log extract at the point where I answer the test call.
<span style="font-size:9.5pt;font-family:Consolas;color:black">sofia/external/4104440002 is the Mitel originating phone.</span><o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.041308 [NOTICE] sofia.c:8429 Channel [sofia/internal/314] has been answered<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.041308 [DEBUG] switch_channel.c:3781 (sofia/internal/314) Callstate Change EARLY -> ACTIVE<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.041308 [DEBUG] switch_core_codec.c:248 sofia/external/4104440002@66.241.96.237 Restore previous codec PCMU:0.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.041308 [DEBUG] switch_ivr_originate.c:3798 Originate Resulted in Success: [sofia/internal/314]<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.041308 [DEBUG] switch_channel.c:2047 (sofia/external/4104440002@66.241.96.237) Callstate Change RING_WAIT -> ACTIVE<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.041308 [DEBUG] switch_ivr_bridge.c:1782 (sofia/internal/314) State Change CS_CONSUME_MEDIA -> CS_EXCHANGE_MEDIA<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.041308 [DEBUG] switch_core_state_machine.c:584 (sofia/internal/314) Running State Change CS_EXCHANGE_MEDIA (Cur 4 Tot 1109)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.041308 [DEBUG] switch_core_state_machine.c:653 (sofia/internal/314) State EXCHANGE_MEDIA<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.041308 [DEBUG] mod_sofia.c:646 SOFIA EXCHANGE_MEDIA<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:04.101306 [DEBUG] switch_rtp.c:7550 Correct audio ip/port confirmed.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.501320 [NOTICE] sofia.c:1079 Hangup sofia/external/4104440002@66.241.96.237 [CS_EXECUTE] [NORMAL_CLEARING]<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.501320 [DEBUG] switch_ivr_bridge.c:917 BRIDGE THREAD DONE [sofia/external/4104440002@66.241.96.237]<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_ivr_bridge.c:825 sofia/external/4104440002@66.241.96.237 ending bridge by request from write function<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_ivr_bridge.c:917 BRIDGE THREAD DONE [sofia/internal/314]<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [NOTICE] switch_ivr_bridge.c:1034 Hangup sofia/internal/314 [CS_EXCHANGE_MEDIA] [NORMAL_CLEARING]<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_core_state_machine.c:653 (sofia/internal/314) State EXCHANGE_MEDIA going to sleep<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_core_state_machine.c:584 (sofia/internal/314) Running State Change CS_HANGUP (Cur 4 Tot 1109)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_core_state_machine.c:847 (sofia/internal/314) Callstate Change ACTIVE -> HANGUP<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_ivr_bridge.c:1881 sofia/internal/314 skip receive message [UNBRIDGE] (channel is hungup already)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_ivr_bridge.c:1884 sofia/external/4104440002@66.241.96.237 skip receive message [UNBRIDGE] (channel is hungup already)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_core_state_machine.c:849 (sofia/internal/314) State HANGUP<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] mod_sofia.c:443 sofia/internal/314 Overriding SIP cause 480 with 200 from the other leg<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] mod_sofia.c:449 Channel sofia/internal/314 hanging up, cause: NORMAL_CLEARING<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_core_session.c:2887 sofia/external/4104440002@66.241.96.237 skip receive message [APPLICATION_EXEC_COMPLETE] (channel
is hungup already)<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.5pt;font-family:Consolas;color:black">15:52:07.521295 [DEBUG] switch_core_session.c:2887 sofia/external/4104440002@66.241.96.237 skip receive message [APPLICATION_EXEC_COMPLETE] (channel
is hungup already)<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any ideas why this is happening?<o:p></o:p></p>
<p class="MsoNormal">Anyone know any secrets about Mitel phones other then use TCP instead of UDP?<o:p></o:p></p>
<p class="MsoNormal">Any ideas on how to debug this further since it happens so rarely?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Sean<o:p></o:p></p>
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