ACK is not received from SIP

Discussion in '3CX Phone System - General' started by gordontor, Jan 5, 2014.

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  1. gordontor

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    Since this evening, whenever an outbound incoming call is received, after about 30 seconds, the call is disconnected. If the call is from another extension, no disconnection will happen.

    04-Jan-2014 21:52:53.187 [CM503008]: Call(C:2): Call is terminated
    04-Jan-2014 21:52:53.187 [CM503021]: Call(C:2): ACK is not received from sip:xxxxxxxxxx@172.29.249.169:9119
     
  2. mixig

    mixig Active Member

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    Start firewall checker and post the results here, NAT/firewall problem probably..
     
  3. jpillow

    jpillow Well-Known Member

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    Maybe if you post the server log or a packet capture that would shine some light on why this is happening, is this a remote extension are they all onsite, is this issues happeneing on both incoming and outoging callsk... There isnt a lot of information to go on here maybe if you were to provide more detail that would be helpful in getting this figured out.
     
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  4. gordontor

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    Thanks for reply. I did "Run Firewall Checker" from Settings - Firewall Checker", and it showed everything was successful. Now system is running well. No more disconnections happen.

    When I posted this topic, the disconnection only happened to the incoming calls. The outgoing calls were working well. Now, both incoming and outgoing are working.
     
  5. way

    way

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    Do you use a load balancing router? If you use this, make sure to bind port 3478 to the same supply as you use for VoIP.
     
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