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Disconnections just after dialing process


natedev
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For a small percentage of our outbound calls each day (about 3 or 4 times per day), we'll hear ringing and then suddenly a fast-busy sound and the call drops.

 

Our SIP trunk provider is Broadvox and they did a capture of the problem when it occurred. What they said is that sometimes pbxnsip 3.2.0.3144 (win32) isn't sending a response to their 200 code to indicate acknowledgement of the connection. As a result, Broadvox thinks the caller on the pbxnsip side hung up so they disconnect.

 

Is anyone else running into this? If so, what version are you running (and what OS)?

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For a small percentage of our outbound calls each day (about 3 or 4 times per day), we'll hear ringing and then suddenly a fast-busy sound and the call drops.

 

Our SIP trunk provider is Broadvox and they did a capture of the problem when it occurred. What they said is that sometimes pbxnsip 3.2.0.3144 (win32) isn't sending a response to their 200 code to indicate acknowledgement of the connection. As a result, Broadvox thinks the caller on the pbxnsip side hung up so they disconnect.

 

Is anyone else running into this? If so, what version are you running (and what OS)?

 

You mean the ACK does not make it? What transport layer? I guess UDP? Maybe it makes sense to run Wireshark on port 5060 and record the signalling. It could be a problem with DNS SRV or the branch tags.

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