Take your cellphone and dial the Twilio Number you purchased. Scroll down to 'Voice' under 'A Call Comes in' select your configured TwiML Bin as SIP Outbound call from the dropdown menu and click 'Save'. In the first instance of the error, I am curious as to whether the source being the external gateway IP means that is a problem at the other end? This can't be the case as it happens on calls from anyone. (link takes you to an external page) page. However thati s about where my knowledge ends. I understand that this error is caused by a UAS receiving a SIP packet for call of which it is not aware. Settings -> Accounts -> Select your sip account. Change the DTMF mode to match the server settings. At time 29 is when the internal transfer is made. Go to Settings -> accounts -> select your SIP account -> tap 'Edit' -> Swipe left or right until you reach the 'Features' section.

Here is the wireshark trace we are getting on an independent call. However we do need to find out what is causing this error because it is causing havoc with our SIP call recorder. So with the actual telecommunication, there is no probem. Everyone can still talk, the new extension picks up the call fine. What is strange is that, even after showing this error, the call continues fine. Outbound calls transferred do not produce the error. Our phones are done through SIP and we were noticing this error appearing on our server.Īfter running tests, we have determined that it only appears on inbound calls from external numbers, when we attempt to transfer that call to an internal extension.

Zoiper call ended