<div>
<div>One potential reason could be that the ACK request being sent to Asterisk is malformed. Notice "branch=0" in the top Via. This should start with "z9hG4bK" magic cookie since the INVITE was an RFC 3261 transaction.
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<div> </div>
<div>While "branch=0" is valid in RFC 2543, I don't think an INVITE can start-off as RFC 3261 and then the ACK can switch over to RFC 2543 in the middle of the transaction. Clearly, Asterisk is dropping this ACK on the floor.
</div><span class="sg">
<div> </div>
<div>Raj</div></span><span class="q">
<div> </div>
<div> </div>
<div><-- SIP read from 147.202.nnn.nnn:5060:<br>ACK <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:sip:6499777777@203.89.nnn.nnn" target="_blank">sip:6499777777@203.89.nnn.nnn</a> SIP/2.0<br>Record-Route: <sip:
147.202.nnn.nnn;ftag=as4917b107;lr=on><br>Via: SIP/2.0/UDP 147.202.nnn.nnn;<font color="#cc0000"><font color="#ff0000">branch=0</font><br></font>Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK61752efe;rport=5060<br>
From: "6494444444" <<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:sip:6494444444@202.180.nnn.nnn" target="_blank"> sip:6494444444@202.180.nnn.nnn</a>>;tag=as4917b107<br>To: <<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:sip:6499777777@domain.co.nz" target="_blank">
sip:6499777777@domain.co.nz</a>>;tag=as7cefaa53<br>Contact: <<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:sip:6494444444@202.180.nnn.nnn" target="_blank"> sip:6494444444@202.180.nnn.nnn</a>
><br>Call-ID: <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:79620dc1382184b64681b2e85584ca4d@202.180.nnn.nnn" target="_blank">79620dc1382184b64681b2e85584ca4d@202.180.nnn.nnn</a><br>CSeq: 102 ACK
<br>User-Agent: Asterisk PBX<br>Max-Forwards: 69 <br>Content-Length: 0</div></span></div>
<div> </div>
<div><br> <br>--- (12 headers 0 lines) ---<br>Retransmitting #6 (no NAT) to 147.202.nnn.nnn:5060:<br>SIP/2.0 200 OK<br>Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd0e3.48331fd3.0;received=147.202.nnn.nnn<br>Via: SIP/2.0/UDP
202.180.nnn.nnn:5060;branch=z9hG4bK3757e55c;rport=5060<br>Record-Route: <sip:147.202.nnn.nnn;ftag=as4917b107;lr=on><br>From: "6494444444" <<a href="mailto:sip:6494444444@202.180.nnn.nnn">sip:6494444444@202.180.nnn.nnn
</a>>;tag=as4917b107<br>To: <<a href="mailto:sip:6499777777@domain.co.nz">sip:6499777777@domain.co.nz</a>>;tag=as7cefaa53<br>Call-ID: <a href="mailto:79620dc1382184b64681b2e85584ca4d@202.180.nnn.nnn">79620dc1382184b64681b2e85584ca4d@202.180.nnn.nnn
</a><br>CSeq: 102 INVITE<br>User-Agent: Asterisk PBX<br>Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY<br>Contact: <<a href="mailto:sip:6499777777@203.89.nnn.nnn">sip:6499777777@203.89.nnn.nnn</a>>
<br>Content-Type: application/sdp<br>Content-Length: 244<br><br>v=0<br>o=root 16300 16300 IN IP4 203.89.nnn.nnn<br>s=session<br>c=IN IP4 203.89.nnn.nnn<br>t=0 0<br>m=audio 11648 RTP/AVP 0 8 101<br>a=rtpmap:0 PCMU/8000<br>
a=rtpmap:8 PCMA/8000<br>a=rtpmap:101 telephone-event/8000<br>a=fmtp:101 0-16<br>a=silenceSupp:off - - - -<br><br>---<br>capetown*CLI><br><-- SIP read from 147.202.nnn.nnn:5060:<br>ACK <a href="mailto:sip:6499777777@203.89.nnn.nnn">
sip:6499777777@203.89.nnn.nnn</a> SIP/2.0<br>Record-Route: <sip:147.202.nnn.nnn;ftag=as4917b107;lr=on><br>Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0<br>Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0c397910;rport=5060
<br>From: "6494444444" <<a href="mailto:sip:6494444444@202.180.nnn.nnn">sip:6494444444@202.180.nnn.nnn</a>>;tag=as4917b107<br>To: <<a href="mailto:sip:6499777777@domain.co.nz">sip:6499777777@domain.co.nz
</a>>;tag=as7cefaa53<br>Contact: <<a href="mailto:sip:6494444444@202.180.nnn.nnn">sip:6494444444@202.180.nnn.nnn</a>><br>Call-ID: <a href="mailto:79620dc1382184b64681b2e85584ca4d@202.180.nnn.nnn">79620dc1382184b64681b2e85584ca4d@202.180.nnn.nnn
</a><br>CSeq: 102 ACK<br>User-Agent: Asterisk PBX<br>Max-Forwards: 69<br>Content-Length: 0<br><br><br>--- (12 headers 0 lines) ---<br>== Spawn extension (ivr-3, s, 7) exited non-zero on 'SIP/6499777777-b791bb60'<br>
-- Executing Hangup("SIP/6499777777-b791bb60", "") in new stack<br>== Spawn extension (ivr-3, h, 1) exited non-zero on 'SIP/6499777777-b791bb60'<br>Destroying call '<a href="mailto:79620dc1382184b64681b2e85584ca4d@202.180.nnn.nnn">
79620dc1382184b64681b2e85584ca4d@202.180.nnn.nnn</a>'<br>capetown*CLI><br><br>Any advice in resolving this issue would be greatly appreciated.<br><br>Regards<br><br>Cameron<br><br><br><br>___________________________________________________________
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