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.
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.
Raj
<-- SIP read from 147.202.nnn.nnn:5060:
ACK sip:[EMAIL PROTECTED] SIP/2.0
Record-Route: <sip:147.202.nnn.nnn;ftag=as4917b107;lr=on>
Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0
Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK61752efe;rport=5060
From: "6494444444" < sip:[EMAIL PROTECTED]>;tag=as4917b107
To: <sip:[EMAIL PROTECTED]>;tag=as7cefaa53
Contact: < sip:[EMAIL PROTECTED]>
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK
User-Agent: Asterisk PBX
Max-Forwards: 69
Content-Length: 0
--- (12 headers 0 lines) ---
Retransmitting #6 (no NAT) to 147.202.nnn.nnn:5060:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd0e3.48331fd3.0;received=
147.202.nnn.nnn
Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK3757e55c;rport=5060
Record-Route: <sip:147.202.nnn.nnn;ftag=as4917b107;lr=on>
From: "6494444444" <sip:[EMAIL PROTECTED]>;tag=as4917b107
To: <sip:[EMAIL PROTECTED]>;tag=as7cefaa53
Call-ID: [EMAIL PROTECTED]
CSeq: 102 INVITE
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Contact: <sip:[EMAIL PROTECTED]>
Content-Type: application/sdp
Content-Length: 244
v=0
o=root 16300 16300 IN IP4 203.89.nnn.nnn
s=session
c=IN IP4 203.89.nnn.nnn
t=0 0
m=audio 11648 RTP/AVP 0 8 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
---
capetown*CLI>
<-- SIP read from 147.202.nnn.nnn:5060:
ACK sip:[EMAIL PROTECTED] SIP/2.0
Record-Route: <sip:147.202.nnn.nnn;ftag=as4917b107;lr=on>
Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0
Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0c397910;rport=5060
From: "6494444444" <sip:[EMAIL PROTECTED]>;tag=as4917b107
To: <sip:[EMAIL PROTECTED]>;tag=as7cefaa53
Contact: <sip:[EMAIL PROTECTED]>
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK
User-Agent: Asterisk PBX
Max-Forwards: 69
Content-Length: 0
--- (12 headers 0 lines) ---
== Spawn extension (ivr-3, s, 7) exited non-zero on
'SIP/6499777777-b791bb60'
-- Executing Hangup("SIP/6499777777-b791bb60", "") in new stack
== Spawn extension (ivr-3, h, 1) exited non-zero on
'SIP/6499777777-b791bb60'
Destroying call '[EMAIL PROTECTED]'
capetown*CLI>
Any advice in resolving this issue would be greatly appreciated.
Regards
Cameron
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