What do you have in the alias and in the listen statements??
Sometimes I found similar behaviour and a 483 Too Many Hops at the end when openSER does not recognize the request (CANCEL) as targeted to itself. The problem is that 10.200.0.228 does not validates against the myself statement and the server sends the request to the IP present in the Req-URI, which happens to be the openSER IP address. This proceeding is repeated until the Too Many Hops is reached.
There was another issue with CANCEL to INVITE transactions which have not finished (no reply>199 received) because the CANCEL does not match the transaction when the caller "hangs up" before the callee "picks up the phone". I think this is more a openSER internal issue which might have been solved...apologies if this issue has been closed.
Hope it helps, Samuel.
2006/5/4, unplug maillisting@gmail.com:
I have experienced a problem (looping problem?) in the system. From the log (ngrep) below, the cancel message issues a loop and it will affect the performance of the system. User can't dial/receive call after the loop happened.
How and why this loop will created? Does it related to the rtpproxy that I am using in the system? Any one can give me some hints?
Thanks, unplug
Note: 10.200.0.228 is an openser server.
filter: (ip) and ( port 5060 ) U 10.200.0.228:5060 -> 10.200.0.228:5060 CANCEL sip:85234163634@10.200.0.228 SIP/2.0. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.3ffb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.2ffb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.1ffb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.0ffb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.fefb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.eefb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.defb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.cefb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.befb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.aefb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.9efb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.8efb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.7efb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.6efb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.4efb2934.0. Via: SIP/2.0/UDP 10.0.0.92:5060;branch=z9hG4bKrmPCJR8Xm6JKY4o8. Max-Forwards: 55. User-Agent: Koncept KE10XX v4.32.14 00-09-45-0a-fc-29. From: "871966760539" sip:871966760539@10.200.0.228;tag=ckRP8FNJugUqMOjy. To: "85234163634" sip:85234163634@10.200.0.228. Call-ID: WfigvZ4YJatMKamV@10.0.0.92. Contact: sip:871966760539@10.0.0.92:5060. CSeq: 1 CANCEL. Content-Length: 0. .
# U 10.200.0.228:5060 -> 10.200.0.228:5060 SIP/2.0 408 Request Timeout. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.201bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.101bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.001bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.ff0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.ef0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.df0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.cf0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.bf0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.af0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.9f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.8f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.7f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.6f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.5f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.4f0bae66.0. Via: SIP/2.0/UDP 10.0.0.92:5060;branch=z9hG4bKjMEHTGhvWKHZ0R2J. From: "871966760539" sip:871966760539@10.200.0.228;tag=SM4dtzpkDKYyCkzu. To: "8521878200" sip:8521878200@10.200.0.228;tag=4cdbaed0e769eb1d9b81f5252847cf64-3d33. Call-ID: nQCHB6bq42pOheks@10.0.0.92. CSeq: 1 CANCEL. Server: OpenSer (1.0.1 (i386/linux)). Content-Length: 0. Warning: 392 10.200.0.228:5060 "Noisy feedback tells: pid=3174 req_src_ip=10.200.0.228 req_src_port=5060 in_uri=sip:8521878200@10.200.0.228 out_uri=sip:8521878200@10.200.0.228 via_cnt==0". .
######## U 10.200.0.228:5060 -> 10.200.0.228:5060 SIP/2.0 408 Request Timeout. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.bf0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.af0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.9f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.8f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.7f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.6f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.5f0bae66.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bK5002.4f0bae66.0. Via: SIP/2.0/UDP 10.0.0.92:5060;branch=z9hG4bKjMEHTGhvWKHZ0R2J. From: "871966760539" sip:871966760539@10.200.0.228;tag=SM4dtzpkDKYyCkzu. To: "8521878200" sip:8521878200@10.200.0.228;tag=4cdbaed0e769eb1d9b81f5252847cf64-ab74. Call-ID: nQCHB6bq42pOheks@10.0.0.92. CSeq: 1 CANCEL. Server: OpenSer (1.0.1 (i386/linux)). Content-Length: 0. Warning: 392 10.200.0.228:5060 "Noisy feedback tells: pid=3174 req_src_ip=10.200.0.228 req_src_port=5060 in_uri=sip:8521878200@10.200.0.228 out_uri=sip:8521878200@10.200.0.228 via_cnt==0". .
########### U 10.200.0.228:5060 -> 10.200.0.228:5060 CANCEL sip:85292558811@10.200.0.228 SIP/2.0. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.edcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.ddcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.cdcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.bdcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.adcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.9dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.8dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.7dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.6dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.5dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.4dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.3dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.2dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.1dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.0dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.fccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.eccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.dccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.cccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.bccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.accf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.9ccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.8ccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.7ccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.6ccf03a7.0. Via: SIP/2.0/UDP 10.0.0.92:5060;branch=z9hG4bKlpjLoMyFjsI1BvQL. Max-Forwards: 45. User-Agent: Koncept KE10XX v4.32.14 00-09-45-0a-fc-29. From: "871966760539" sip:871966760539@10.200.0.228;tag=MySoSexGPE0vUXa5. To: "85292558811" sip:85292558811@10.200.0.228. Call-ID: 8p3FIbMUfYMXOuW3@10.0.0.92. Contact: sip:871966760539@10.0.0.92:5060. CSeq: 1 CANCEL. Content-Length: 0. .
### U 10.200.0.228:5060 -> 10.200.0.228:5060 CANCEL sip:85234163634@10.200.0.228 SIP/2.0. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Record-Route: sip:10.200.0.228;ftag=ckRP8FNJugUqMOjy;lr=on. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.3ffb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.2ffb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.1ffb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.0ffb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.fefb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.eefb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.defb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.cefb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.befb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.aefb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.9efb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.8efb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.7efb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.6efb2934.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf34.4efb2934.0. Via: SIP/2.0/UDP 10.0.0.92:5060;branch=z9hG4bKrmPCJR8Xm6JKY4o8. Max-Forwards: 55. User-Agent: Koncept KE10XX v4.32.14 00-09-45-0a-fc-29. From: "871966760539" sip:871966760539@10.200.0.228;tag=ckRP8FNJugUqMOjy. To: "85234163634" sip:85234163634@10.200.0.228. Call-ID: WfigvZ4YJatMKamV@10.0.0.92. Contact: sip:871966760539@10.0.0.92:5060. CSeq: 1 CANCEL. Content-Length: 0. .
######## U 10.200.0.228:5060 -> 10.200.0.228:5060 CANCEL sip:85292558811@10.200.0.228 SIP/2.0. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Record-Route: sip:10.200.0.228;ftag=MySoSexGPE0vUXa5;lr=on. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.cdcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.bdcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.adcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.9dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.8dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.7dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.6dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.5dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.4dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.3dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.2dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.1dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.0dcf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.fccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.eccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.dccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.cccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.bccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.accf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.9ccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.8ccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.7ccf03a7.0. Via: SIP/2.0/UDP 10.200.0.228;branch=z9hG4bKf9f4.6ccf03a7.0. Via: SIP/2.0/UDP 10.0.0.92:5060;branch=z9hG4bKlpjLoMyFjsI1BvQL. Max-Forwards: 47. User-Agent: Koncept KE10XX v4.32.14 00-09-45-0a-fc-29. From: "871966760539" sip:871966760539@10.200.0.228;tag=MySoSexGPE0vUXa5. To: "85292558811" sip:85292558811@10.200.0.228. Call-ID: 8p3FIbMUfYMXOuW3@10.0.0.92. Contact: sip:871966760539@10.0.0.92:5060. CSeq: 1 CANCEL. Content-Length: 0. .
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