-------------------------
INITIAL CALL
-------------------------

>>>>>> ASTERISK -> HUAWEI

INVITE sip:911839945@W.X.Y.Z:5060 SIP/2.0
Via: SIP/2.0/UDP A.B.C.D:5060;branch=z9hG4bK1121f2ad;rport
Max-Forwards: 70
From: "Unknown" <sip:Unknown@A.B.C.D>;tag=as7c4d1227
To: <sip:911839945@W.X.Y.Z:5060>
Contact: <sip:Unknown@A.B.C.D>
Call-ID: 07f382923127df5a240f614564712165@A.B.C.D
CSeq: 102 INVITE
User-Agent: Asterisk PBX
Date: Thu, 22 Jul 2010 10:37:02 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 281

v=0
o=root 1066087043 1066087043 IN IP4 A.B.C.D
s=Asterisk PBX 1.6.2.10
c=IN IP4 A.B.C.D
t=0 0
m=audio 10062 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
a=ptime:20
a=sendrecv



>>>>>> ASTERISK <- HUAWEI

SIP/2.0 100 Trying
Via: SIP/2.0/UDP A.B.C.D:5060;received=A.B.C.D;branch=z9hG4bK1121f2ad;rport=5060
From: "Unknown" <sip:Unknown@A.B.C.D>;tag=as7c4d1227
To: <sip:911839945@W.X.Y.Z:5060>
Call-ID: 07f382923127df5a240f614564712165@A.B.C.D
CSeq: 102 INVITE



>>>>>> ASTERISK <- HUAWEI

SIP/2.0 180 Ringing
Via: SIP/2.0/UDP A.B.C.D:5060;received=A.B.C.D;branch=z9hG4bK1121f2ad;rport=5060
From: "Unknown" <sip:Unknown@A.B.C.D>;tag=as7c4d1227
To: <sip:911839945@W.X.Y.Z:5060>;tag=dg1caiif-CC-26
Call-ID: 07f382923127df5a240f614564712165@A.B.C.D
CSeq: 102 INVITE
Contact: <sip:911839945@W.X.Y.Z:5060;user=phone;transport=udp>
Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,REGISTER,INFO,PRACK,SUBSCRIBE,NOTIFY,UPDATE,MESSAGE,REFER
Content-Length: 221
Content-Type: application/sdp

v=0
o=HuaweiSoftX3000 15280591 15280591 IN IP4 W.X.Y.K
s=Sip Call
c=IN IP4 W.X.Y.K
t=0 0
m=audio 21988 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=ptime:20
a=fmtp:101 0-15



>>>>>> ASTERISK <- HUAWEI

SIP/2.0 200 OK
Via: SIP/2.0/UDP A.B.C.D:5060;received=A.B.C.D;branch=z9hG4bK1121f2ad;rport=5060
From: "Unknown" <sip:Unknown@A.B.C.D>;tag=as7c4d1227
To: <sip:911839945@W.X.Y.Z:5060>;tag=dg1caiif-CC-26
Call-ID: 07f382923127df5a240f614564712165@A.B.C.D
CSeq: 102 INVITE
Contact: <sip:911839945@W.X.Y.Z:5060;user=phone;transport=udp>
Content-Length: 221
Content-Type: application/sdp

v=0
o=HuaweiSoftX3000 15280591 15280592 IN IP4 W.X.Y.K
s=Sip Call
c=IN IP4 W.X.Y.K
t=0 0
m=audio 21988 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=ptime:20
a=fmtp:101 0-15



>>>>>> ASTERISK -> HUAWEI

ACK sip:911839945@W.X.Y.Z:5060;user=phone;transport=udp SIP/2.0
Via: SIP/2.0/UDP A.B.C.D:5060;branch=z9hG4bK3c35ed8b;rport
Max-Forwards: 70
From: "Unknown" <sip:Unknown@A.B.C.D>;tag=as7c4d1227
To: <sip:911839945@W.X.Y.Z:5060>;tag=dg1caiif-CC-26
Contact: <sip:Unknown@A.B.C.D>
Call-ID: 07f382923127df5a240f614564712165@A.B.C.D
CSeq: 102 ACK
User-Agent: Asterisk PBX
Content-Length: 0