thanks very much for your reply.
In my call flow, cipango is not a proxy server but a b2bua server, A and cipango is a sip session, B and cipango is another sip session. So I think I should not use the proxy.setRecordRoute(true), right?
I refered to the b2bua demo provided by the cipango too.
The attachment below is my cipango logs. (user a is the caller, and b is the callee)
And the question now is: When cipango recv a 200OK from the callee b,then it use the request.createResponse(200) to create a 200OK response to caller a. The contact of the 200OK response to a is the cipango's sip uri (cipango server ip, server port). After the caller a recv the 200OK, it generate an ACK message, the request -uri of the ack is the contact address of the pre 200OK(cipango server ip, server port).
Refer to the sip RFC, I think these are all correct. But my sip servlet code(doRequest) can't listen to the recv of this ACK message. In the cipango logs,it had printed the ack message, so I think it was the sip stack who ignored and abandoned the message. Since the sip stact didn't accept the ack message, then it keeped sending the 200OK to the caller a.
Below attachment is my cipango logs, cipango was acted as a b2bua server between caller a , and callee b.
I don't know whether it is the problem of my computer, I can't add a file in this reply, so I can only paste my cipango logs as the below text:
======================================================================================================
Allow: ACK, CANCEL, BYE, OPTIONS, INVITE
Call-ID: og3it7uf6nqgn18ntj3quv
Contact: <sip:fd43...@luk4a3al5kar.invalid;transport=ws>;reg-id=1;+sip.instance="<urn:uuid:9720f561-9339-4905-93c0-1ec5029a879b>";expires=600
Content-Length: 0
CSeq: 81 REGISTER
Max-Forwards: 69
Route: <sip:10.166.41.126:18080;transport=ws;lr>
Supported: path, outbound, gruu
User-Agent: JsSIP 0.3.0
Via: SIP/2.0/WS luk4a3al5kar.invalid;branch=z9hG4bK9796433
SIP/2.0 200 OK
Call-ID: og3it7uf6nqgn18ntj3quv
Contact: <sip:fd43...@luk4a3al5kar.invalid;transport=ws>;reg-id=1;+sip.instance="<urn:uuid:9720f561-9339-4905-93c0-1ec5029a879b>";expires=600;pub-gruu="sip:a...@10.166.41.126:18080;gr=urn:uuid:9720f561-9339-4905-93c0-1ec5029a879b"
;temp-gruu="sip:a...@10.166.41.126:18080;gr"
;expires=3600
CSeq: 81 REGISTER
Via: SIP/2.0/WS luk4a3al5kar.invalid;branch=z9hG4bK9796433;received=10.166.41.126
Content-Length: 0
Allow: ACK, CANCEL, BYE, OPTIONS, INVITE
Call-ID: v0fvin3ou0ip28u3j88nqo
Contact: <sip:9qk6...@7m0e529frbnl.invalid;transport=ws>;reg-id=1;+sip.instance="<urn:uuid:98419f24-06bd-4981-ba96-e6b3c715c73e>";expires=600
Content-Length: 0
CSeq: 81 REGISTER
Max-Forwards: 69
Route: <sip:10.166.41.126:18080;transport=ws;lr>
Supported: path, outbound, gruu
User-Agent: JsSIP 0.3.0
Via: SIP/2.0/WS 7m0e529frbnl.invalid;branch=z9hG4bK621975
SIP/2.0 200 OK
Call-ID: v0fvin3ou0ip28u3j88nqo
Contact: <sip:9qk6...@7m0e529frbnl.invalid;transport=ws>;reg-id=1;+sip.instance="<urn:uuid:98419f24-06bd-4981-ba96-e6b3c715c73e>";expires=600;pub-gruu="sip:b...@10.166.41.126:18080;gr=urn:uuid:98419f24-06bd-4981-ba96-e6b3c715c73e"
;temp-gruu="sip:b...@10.166.41.126:18080;gr"
;expires=3600
CSeq: 81 REGISTER
Via: SIP/2.0/WS 7m0e529frbnl.invalid;branch=z9hG4bK621975;received=10.166.41.126
Content-Length: 0
Allow: ACK, CANCEL, BYE, OPTIONS, INVITE
Call-ID: 49q3vik5243l5758cq8u
Contact: <sip:a...@10.166.41.126:18080;gr=urn:uuid:9720f561-9339-4905-93c0-1ec5029a879b;ob>
Content-Length: 1489
Content-Type: application/sdp
CSeq: 6778 INVITE
Max-Forwards: 69
Route: <sip:10.166.41.126:18080;transport=ws;lr>
Supported: path, outbound, gruu
User-Agent: JsSIP 0.3.0
Via: SIP/2.0/WS luk4a3al5kar.invalid;branch=z9hG4bK3280942
v=0
o=- 223673127 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0
m=audio 49380 RTP/SAVPF 111 103 104 0 8 107 106 105 13 126
c=IN IP4 10.166.41.126
a=rtcp:49380 IN IP4 10.166.41.126
a=candidate:579493354 1 udp 2113937151 10.166.41.126 49380 typ host generation 0
a=candidate:579493354 2 udp 2113937151 10.166.41.126 49380 typ host generation 0
a=candidate:1812570394 1 tcp 1509957375 10.166.41.126 46881 typ host generation 0
a=candidate:1812570394 2 tcp 1509957375 10.166.41.126 46881 typ host generation 0
a=ice-ufrag:vrsZ8UYTgcQdId3R
a=ice-pwd:COAwdY1IFzlu7ITpU2uawFxI
a=ice-options:google-ice
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=mid:audio
a=rtcp-mux
a=crypto:0 AES_CM_128_HMAC_SHA1_32 inline:I/lurQ0U/0EifLrEu5gIgHsl59jSUfP86MpHCZuI
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:iWtls1qQxVw97pOE+Lk/qJkbOHNlUYPpY3wusa4C
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:104 ISAC/32000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:107 CN/48000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:2891400832 cname:t74hX0aOD4Wr1Hfz
a=ssrc:2891400832 msid:yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0 yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0a0
a=ssrc:2891400832 mslabel:yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0
a=ssrc:2891400832 label:yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0a0
SIP/2.0 100 Trying
Call-ID: 49q3vik5243l5758cq8u
CSeq: 6778 INVITE
Via: SIP/2.0/WS luk4a3al5kar.invalid;branch=z9hG4bK3280942;received=10.166.41.126
Content-Length: 0
INVITE sip:b...@10.166.41.126:46879;transport=ws SIP/2.0
Allow: ACK, CANCEL, BYE, OPTIONS, INVITE
Call-ID: SKbrnhG37M@X00197827
Contact: <sip:10.166.41.126:18080;transport=ws;appid=1Y6.3QLKKpBiTxI>
Content-Length: 1489
Content-Type: application/sdp
CSeq: 1 INVITE
Max-Forwards: 70
Supported: path, outbound, gruu
User-Agent: JsSIP 0.3.0
Via: SIP/2.0/WS 10.166.41.126:18080;branch=z9hG4bK3FdgXrOn6iY
v=0
o=- 223673127 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0
m=audio 49380 RTP/SAVPF 111 103 104 0 8 107 106 105 13 126
c=IN IP4 10.166.41.126
a=rtcp:49380 IN IP4 10.166.41.126
a=candidate:579493354 1 udp 2113937151 10.166.41.126 49380 typ host generation 0
a=candidate:579493354 2 udp 2113937151 10.166.41.126 49380 typ host generation 0
a=candidate:1812570394 1 tcp 1509957375 10.166.41.126 46881 typ host generation 0
a=candidate:1812570394 2 tcp 1509957375 10.166.41.126 46881 typ host generation 0
a=ice-ufrag:vrsZ8UYTgcQdId3R
a=ice-pwd:COAwdY1IFzlu7ITpU2uawFxI
a=ice-options:google-ice
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=mid:audio
a=rtcp-mux
a=crypto:0 AES_CM_128_HMAC_SHA1_32 inline:I/lurQ0U/0EifLrEu5gIgHsl59jSUfP86MpHCZuI
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:iWtls1qQxVw97pOE+Lk/qJkbOHNlUYPpY3wusa4C
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:104 ISAC/32000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:107 CN/48000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:2891400832 cname:t74hX0aOD4Wr1Hfz
a=ssrc:2891400832 msid:yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0 yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0a0
a=ssrc:2891400832 mslabel:yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0
a=ssrc:2891400832 label:yK4A8hFH44whvr1nz4ZzpWxUOG2ENqdFZ2g0a0
SIP/2.0 100 Trying
Call-ID: SKbrnhG37M@X00197827
Content-Length: 0
CSeq: 1 INVITE
Via: SIP/2.0/WS 10.166.41.126:18080;branch=z9hG4bK3FdgXrOn6iY
SIP/2.0 180 Ringing
Call-ID: SKbrnhG37M@X00197827
Contact: <sip:b...@10.166.41.126:18080;gr=urn:uuid:98419f24-06bd-4981-ba96-e6b3c715c73e>
Content-Length: 0
CSeq: 1 INVITE
Via: SIP/2.0/WS 10.166.41.126:18080;branch=z9hG4bK3FdgXrOn6iY
SIP/2.0 180 Ringing
Call-ID: 49q3vik5243l5758cq8u
Contact: <sip:10.166.41.126:18080;transport=ws;appid=1Y6.3QLKKpBiTxI>
CSeq: 6778 INVITE
Via: SIP/2.0/WS luk4a3al5kar.invalid;branch=z9hG4bK3280942;received=10.166.41.126
Content-Length: 0
SIP/2.0 200 OK
Call-ID: SKbrnhG37M@X00197827
Contact: <sip:b...@10.166.41.126:18080;gr=urn:uuid:98419f24-06bd-4981-ba96-e6b3c715c73e>
Content-Length: 1204
Content-Type: application/sdp
CSeq: 1 INVITE
Via: SIP/2.0/WS 10.166.41.126:18080;branch=z9hG4bK3FdgXrOn6iY
v=0
o=- 922188810 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
m=audio 49381 RTP/SAVPF 111 103 104 0 8 107 106 105 13 126
c=IN IP4 10.166.41.126
a=rtcp:1 IN IP4 0.0.0.0
a=candidate:579493354 1 udp 2113937151 10.166.41.126 49381 typ host generation 0
a=candidate:1812570394 1 tcp 1509957375 10.166.41.126 46883 typ host generation 0
a=ice-ufrag:kQkzZbKEnxfZZ3P+
a=ice-pwd:LQWkAPtsI7kv/n97SkHHg2VF
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=mid:audio
a=rtcp-mux
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:T0BktPPPF/Z1U/xeoLYp9zCSKJxYcrdnw61hytJq
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:104 ISAC/32000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:107 CN/48000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:
2537349872 msid:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
a=ssrc:
2537349872 mslabel:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
a=ssrc:
2537349872 label:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
SIP/2.0 200 OK
Call-ID: 49q3vik5243l5758cq8u
Contact: <sip:10.166.41.126:18080;transport=ws;appid=1Y6.3QLKKpBiTxI>
Content-Length: 1204
Content-Type: application/sdp
CSeq: 6778 INVITE
Via: SIP/2.0/WS luk4a3al5kar.invalid;branch=z9hG4bK3280942;received=10.166.41.126
v=0
o=- 922188810 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
m=audio 49381 RTP/SAVPF 111 103 104 0 8 107 106 105 13 126
c=IN IP4 10.166.41.126
a=rtcp:1 IN IP4 0.0.0.0
a=candidate:579493354 1 udp 2113937151 10.166.41.126 49381 typ host generation 0
a=candidate:1812570394 1 tcp 1509957375 10.166.41.126 46883 typ host generation 0
a=ice-ufrag:kQkzZbKEnxfZZ3P+
a=ice-pwd:LQWkAPtsI7kv/n97SkHHg2VF
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=mid:audio
a=rtcp-mux
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:T0BktPPPF/Z1U/xeoLYp9zCSKJxYcrdnw61hytJq
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:104 ISAC/32000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:107 CN/48000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:
2537349872 msid:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
a=ssrc:
2537349872 mslabel:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
a=ssrc:
2537349872 label:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
ACK sip:10.166.41.126:18080;transport=ws;appid=1y6.3qlkkpbitxi SIP/2.0
Call-ID: 49q3vik5243l5758cq8u
Content-Length: 0
CSeq: 6778 ACK
Max-Forwards: 69
Supported: path, outbound, gruu
User-Agent: JsSIP 0.3.0
Via: SIP/2.0/WS luk4a3al5kar.invalid;branch=z9hG4bK7912608
SIP/2.0 200 OK
Call-ID: SKbrnhG37M@X00197827
Contact: <sip:b...@10.166.41.126:18080;gr=urn:uuid:98419f24-06bd-4981-ba96-e6b3c715c73e>
Content-Length: 1204
Content-Type: application/sdp
CSeq: 1 INVITE
Via: SIP/2.0/WS 10.166.41.126:18080;branch=z9hG4bK3FdgXrOn6iY
v=0
o=- 922188810 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
m=audio 49381 RTP/SAVPF 111 103 104 0 8 107 106 105 13 126
c=IN IP4 10.166.41.126
a=rtcp:1 IN IP4 0.0.0.0
a=candidate:579493354 1 udp 2113937151 10.166.41.126 49381 typ host generation 0
a=candidate:1812570394 1 tcp 1509957375 10.166.41.126 46883 typ host generation 0
a=ice-ufrag:kQkzZbKEnxfZZ3P+
a=ice-pwd:LQWkAPtsI7kv/n97SkHHg2VF
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=mid:audio
a=rtcp-mux
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:T0BktPPPF/Z1U/xeoLYp9zCSKJxYcrdnw61hytJq
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:104 ISAC/32000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:107 CN/48000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:
2537349872 msid:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
a=ssrc:
2537349872 mslabel:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
a=ssrc:
2537349872 label:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
SIP/2.0 200 OK
Call-ID: SKbrnhG37M@X00197827
Contact: <sip:b...@10.166.41.126:18080;gr=urn:uuid:98419f24-06bd-4981-ba96-e6b3c715c73e>
Content-Length: 1204
Content-Type: application/sdp
CSeq: 1 INVITE
Via: SIP/2.0/WS 10.166.41.126:18080;branch=z9hG4bK3FdgXrOn6iY
v=0
o=- 922188810 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
m=audio 49381 RTP/SAVPF 111 103 104 0 8 107 106 105 13 126
c=IN IP4 10.166.41.126
a=rtcp:1 IN IP4 0.0.0.0
a=candidate:579493354 1 udp 2113937151 10.166.41.126 49381 typ host generation 0
a=candidate:1812570394 1 tcp 1509957375 10.166.41.126 46883 typ host generation 0
a=ice-ufrag:kQkzZbKEnxfZZ3P+
a=ice-pwd:LQWkAPtsI7kv/n97SkHHg2VF
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=mid:audio
a=rtcp-mux
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:T0BktPPPF/Z1U/xeoLYp9zCSKJxYcrdnw61hytJq
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:104 ISAC/32000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:107 CN/48000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:
2537349872 msid:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
a=ssrc:
2537349872 mslabel:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
a=ssrc:
2537349872 label:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
SIP/2.0 200 OK
Call-ID: SKbrnhG37M@X00197827
Contact: <sip:b...@10.166.41.126:18080;gr=urn:uuid:98419f24-06bd-4981-ba96-e6b3c715c73e>
Content-Length: 1204
Content-Type: application/sdp
CSeq: 1 INVITE
Via: SIP/2.0/WS 10.166.41.126:18080;branch=z9hG4bK3FdgXrOn6iY
v=0
o=- 922188810 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
m=audio 49381 RTP/SAVPF 111 103 104 0 8 107 106 105 13 126
c=IN IP4 10.166.41.126
a=rtcp:1 IN IP4 0.0.0.0
a=candidate:579493354 1 udp 2113937151 10.166.41.126 49381 typ host generation 0
a=candidate:1812570394 1 tcp 1509957375 10.166.41.126 46883 typ host generation 0
a=ice-ufrag:kQkzZbKEnxfZZ3P+
a=ice-pwd:LQWkAPtsI7kv/n97SkHHg2VF
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=mid:audio
a=rtcp-mux
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:T0BktPPPF/Z1U/xeoLYp9zCSKJxYcrdnw61hytJq
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:104 ISAC/32000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:107 CN/48000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:
2537349872 msid:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
a=ssrc:
2537349872 mslabel:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
a=ssrc:
2537349872 label:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
SIP/2.0 200 OK
Call-ID: 49q3vik5243l5758cq8u
Contact: <sip:10.166.41.126:18080;transport=ws;appid=1Y6.3QLKKpBiTxI>
Content-Length: 1204
Content-Type: application/sdp
CSeq: 6778 INVITE
Via: SIP/2.0/WS luk4a3al5kar.invalid;branch=z9hG4bK3280942;received=10.166.41.126
v=0
o=- 922188810 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio
a=msid-semantic: WMS P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
m=audio 49381 RTP/SAVPF 111 103 104 0 8 107 106 105 13 126
c=IN IP4 10.166.41.126
a=rtcp:1 IN IP4 0.0.0.0
a=candidate:579493354 1 udp 2113937151 10.166.41.126 49381 typ host generation 0
a=candidate:1812570394 1 tcp 1509957375 10.166.41.126 46883 typ host generation 0
a=ice-ufrag:kQkzZbKEnxfZZ3P+
a=ice-pwd:LQWkAPtsI7kv/n97SkHHg2VF
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=mid:audio
a=rtcp-mux
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:T0BktPPPF/Z1U/xeoLYp9zCSKJxYcrdnw61hytJq
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10
a=rtpmap:103 ISAC/16000
a=rtpmap:104 ISAC/32000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:107 CN/48000
a=rtpmap:106 CN/32000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:126 telephone-event/8000
a=maxptime:60
a=ssrc:
2537349872 msid:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
a=ssrc:
2537349872 mslabel:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWK
a=ssrc:
2537349872 label:P2pkXPP49GqHldQfnhcbBlEyr1c1VpZMRhWKa0
==========================================================================================================
Thanks you very much for your help and your reply will be appreciated.
Regards.