# U phone_ip:61335 -> server_ip:5060 INVITE sip:called_number@server_domanin SIP/2.0. Via: SIP/2.0/UDP phone_ip:61335;branch=z9hG4bK-5928cfb7. From: sip_username ;tag=89bf3223f61753o0. To: . Call-ID: d0012663-7f62b013@192.168.0.8. CSeq: 102 INVITE. Max-Forwards: 70. Proxy-Authorization: Digest username="sip",realm="asterisk",nonce="2f4c12a0",uri="sip:called_number@server_domanin",algorithm=MD5,response="dfec293ad269bb0c2ff5d1b1b4a2758a". Contact: sip_username . Expires: 240. User-Agent: phone-3.1.4(a). Content-Length: 391. Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER. Content-Type: application/sdp. . v=0. o=- 43163 43163 IN IP4 phone_ip. s=-. c=IN IP4 phone_ip. t=0 0. m=audio 54910 RTP/AVP 0 2 4 8 18 96 97 98 101. a=rtpmap:0 PCMU/8000. a=rtpmap:2 G726-32/8000. a=rtpmap:4 G723/8000. a=rtpmap:8 PCMA/8000. a=rtpmap:18 G729a/8000. a=rtpmap:96 G726-40/8000. a=rtpmap:97 G726-24/8000. a=rtpmap:98 G726-16/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=ptime:20. a=sendrecv. # U server_ip:5060 -> phone_ip:61335 SIP/2.0 100 Trying. Via: SIP/2.0/UDP phone_ip:61335;branch=z9hG4bK-5928cfb7;received=phone_ip. From: sip_username ;tag=89bf3223f61753o0. To: . Call-ID: d0012663-7f62b013@192.168.0.8. CSeq: 102 INVITE. User-Agent: Asterisk PBX. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY. Contact: . Content-Length: 0. . # U server_ip:5060 -> phone_ip:61335 SIP/2.0 200 OK. Via: SIP/2.0/UDP phone_ip:61335;branch=z9hG4bK-5928cfb7;received=phone_ip. From: sip_username ;tag=89bf3223f61753o0. To: ;tag=as63e17e20. Call-ID: d0012663-7f62b013@192.168.0.8. CSeq: 102 INVITE. User-Agent: Asterisk PBX. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY. Contact: . Content-Type: application/sdp. Content-Length: 263. . v=0. o=root 2011 2011 IN IP4 server_ip. s=session. c=IN IP4 server_ip. t=0 0. m=audio 17946 RTP/AVP 0 18 101. a=rtpmap:0 PCMU/8000. a=rtpmap:18 G729/8000. a=fmtp:18 annexb=no. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -. # U phone_ip:61335 -> server_ip:5060 ACK sip:called_number@server_ip SIP/2.0. Via: SIP/2.0/UDP phone_ip:61335;branch=z9hG4bK-2c04f71c. From: sip_username ;tag=89bf3223f61753o0. To: ;tag=as63e17e20. Call-ID: d0012663-7f62b013@192.168.0.8. CSeq: 102 ACK. Max-Forwards: 70. Proxy-Authorization: Digest username="sip",realm="asterisk",nonce="2f4c12a0",uri="sip:called_number@server_ip",algorithm=MD5,response="a13f38fbdc12640e2c2e9d6a0896f56d". Contact: sip_username . User-Agent: phone-3.1.4(a). Content-Length: 0. . # U server_ip:5060 -> destination_ip:5060 INVITE sip:called_number@destination_ip SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK4a6451bf;rport. From: sip_username ;tag=as7f71a1c7. To: . Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 102 INVITE. User-Agent: Asterisk PBX. Max-Forwards: 70. Date: Thu, 24 May 2007 12:21:36 GMT. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY. Content-Type: application/sdp. Content-Length: 263. . v=0. o=root 2011 2011 IN IP4 server_ip. s=session. c=IN IP4 server_ip. t=0 0. m=audio 17370 RTP/AVP 0 18 101. a=rtpmap:0 PCMU/8000. a=rtpmap:18 G729/8000. a=fmtp:18 annexb=no. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -. # U destination_ip:5060 -> server_ip:5060 SIP/2.0 100 Trying. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK4a6451bf;rport. From: sip_username ;tag=as7f71a1c7. To: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 102 INVITE. Content-Length: 0. . # U destination_ip:5060 -> server_ip:5060 SIP/2.0 183 Session Progress. To: ;tag=3388998098-104329. From: sip_username ;tag=as7f71a1c7. Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 102 INVITE. Content-Type: application/sdp. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK4a6451bf;rport. Content-Length: 217. . v=0. o=prxlax02 1234 0 IN IP4 destination_ip. s=sip call. c=IN IP4 destination_ip. t=0 0. m=audio 21246 RTP/AVP 18 101. a=fmtp:18 annexb=no. a=rtpmap:18 G729/8000. a=fmtp:101 0-15. a=rtpmap:101 telephone-event/8000. # U destination_ip:5060 -> server_ip:5060 SIP/2.0 200 OK. To: ;tag=3388998098-104329. From: sip_username ;tag=as7f71a1c7. Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 102 INVITE. Content-Type: application/sdp. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK4a6451bf;rport. Content-Length: 217. . v=0. o=prxlax02 1234 0 IN IP4 destination_ip. s=sip call. c=IN IP4 destination_ip. t=0 0. m=audio 21246 RTP/AVP 18 101. a=fmtp:18 annexb=no. a=rtpmap:18 G729/8000. a=fmtp:101 0-15. a=rtpmap:101 telephone-event/8000. # U server_ip:5060 -> destination_ip:5060 ACK sip:called_number@destination_ip:5060 SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK6ea39a17;rport. From: sip_username ;tag=as7f71a1c7. To: ;tag=3388998098-104329. Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 102 ACK. User-Agent: Asterisk PBX. Max-Forwards: 70. Content-Length: 0. . # U server_ip:5060 -> phone_ip:61335 INVITE sip:sip@phone_ip:61335 SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK3855c268;rport. From: ;tag=as63e17e20. To: sip_username ;tag=89bf3223f61753o0. Contact: . Call-ID: d0012663-7f62b013@192.168.0.8. CSeq: 102 INVITE. User-Agent: Asterisk PBX. Max-Forwards: 70. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY. Content-Type: application/sdp. Content-Length: 241. . v=0. o=root 2011 2012 IN IP4 destination_ip. s=session. c=IN IP4 destination_ip. t=0 0. m=audio 21246 RTP/AVP 18 101. a=rtpmap:18 G729/8000. a=fmtp:18 annexb=no. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -. # U server_ip:5060 -> destination_ip:5060 INVITE sip:called_number@destination_ip:5060 SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK01aee8bf;rport. From: sip_username ;tag=as7f71a1c7. To: ;tag=3388998098-104329. Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 103 INVITE. User-Agent: Asterisk PBX. Max-Forwards: 70. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY. Content-Type: application/sdp. Content-Length: 364. . v=0. o=root 2011 2012 IN IP4 phone_ip. s=session. c=IN IP4 phone_ip. t=0 0. m=audio 54910 RTP/AVP 0 18 4 8 111 97 101. a=rtpmap:0 PCMU/8000. a=rtpmap:18 G729/8000. a=fmtp:18 annexb=no. a=rtpmap:4 G723/8000. a=rtpmap:8 PCMA/8000. a=rtpmap:111 G726-32/8000. a=rtpmap:97 iLBC/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -. # U destination_ip:5060 -> server_ip:5060 SIP/2.0 100 Trying. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK01aee8bf;rport. From: sip_username ;tag=as7f71a1c7. To: ;tag=3388998098-104329. Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 103 INVITE. Content-Length: 0. . # U phone_ip:61335 -> server_ip:5060 SIP/2.0 200 OK. To: sip_username ;tag=89bf3223f61753o0. From: ;tag=as63e17e20. Call-ID: d0012663-7f62b013@192.168.0.8. CSeq: 102 INVITE. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK3855c268. Contact: sip_username . Server: phone-3.1.4(a). Content-Length: 205. Content-Type: application/sdp. . v=0. o=- 44369 44369 IN IP4 phone_ip. s=-. c=IN IP4 phone_ip. t=0 0. m=audio 54916 RTP/AVP 18 101. a=rtpmap:18 G729a/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=ptime:20. a=sendrecv. # U server_ip:5060 -> phone_ip:61335 ACK sip:sip@phone_ip:61335 SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK6a24f12c;rport. From: ;tag=as63e17e20. To: sip_username ;tag=89bf3223f61753o0. Contact: . Call-ID: d0012663-7f62b013@192.168.0.8. CSeq: 102 ACK. User-Agent: Asterisk PBX. Max-Forwards: 70. Content-Length: 0. . # U destination_ip:5060 -> server_ip:5060 SIP/2.0 200 OK. To: ;tag=3388998098-104329. From: sip_username ;tag=as7f71a1c7. Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 103 INVITE. Content-Type: application/sdp. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK01aee8bf;rport. Content-Length: 173. . v=0. o=prxlax02 1234 0 IN IP4 destination_ip. s=sip call. c=IN IP4 destination_ip. t=0 0. m=audio 21246 RTP/AVP 18 101. a=fmtp:101 0-15. a=rtpmap:101 telephone-event/8000. # U server_ip:5060 -> destination_ip:5060 ACK sip:called_number@destination_ip:5060 SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK162e528c;rport. From: sip_username ;tag=as7f71a1c7. To: ;tag=3388998098-104329. Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 103 ACK. User-Agent: Asterisk PBX. Max-Forwards: 70. Content-Length: 0. . # U server_ip:5060 -> destination_ip:5060 INVITE sip:called_number@destination_ip:5060 SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK67def972;rport. From: sip_username ;tag=as7f71a1c7. To: ;tag=3388998098-104329. Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 104 INVITE. User-Agent: Asterisk PBX. Max-Forwards: 70. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY. Content-Type: application/sdp. Content-Length: 235. . v=0. o=root 2011 2013 IN IP4 phone_ip. s=session. c=IN IP4 phone_ip. t=0 0. m=audio 54916 RTP/AVP 18 101. a=rtpmap:18 G729/8000. a=fmtp:18 annexb=no. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -. # U destination_ip:5060 -> server_ip:5060 SIP/2.0 100 Trying. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK67def972;rport. From: sip_username ;tag=as7f71a1c7. To: ;tag=3388998098-104329. Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 104 INVITE. Content-Length: 0. . # U destination_ip:5060 -> server_ip:5060 SIP/2.0 200 OK. To: ;tag=3388998098-104329. From: sip_username ;tag=as7f71a1c7. Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 104 INVITE. Content-Type: application/sdp. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK67def972;rport. Content-Length: 173. . v=0. o=prxlax02 1234 0 IN IP4 destination_ip. s=sip call. c=IN IP4 destination_ip. t=0 0. m=audio 21246 RTP/AVP 18 101. a=fmtp:101 0-15. a=rtpmap:101 telephone-event/8000. # U server_ip:5060 -> destination_ip:5060 ACK sip:called_number@destination_ip:5060 SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK1b728b8d;rport. From: sip_username ;tag=as7f71a1c7. To: ;tag=3388998098-104329. Contact: . Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 104 ACK. User-Agent: Asterisk PBX. Max-Forwards: 70. Content-Length: 0. . # U server_ip:5060 -> destination_ip:5060 BYE sip:called_number@destination_ip:5060 SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK0003df9f;rport. From: sip_username ;tag=as7f71a1c7. To: ;tag=3388998098-104329. Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 105 BYE. User-Agent: Asterisk PBX. Max-Forwards: 70. Content-Length: 0. . # U destination_ip:5060 -> server_ip:5060 SIP/2.0 200 OK. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK0003df9f;rport. From: sip_username ;tag=as7f71a1c7. To: ;tag=3388998098-104329. Call-ID: 1e68bac8104b6dc858c120f17116116e@server_ip. CSeq: 105 BYE. Content-Length: 0. . # U server_ip:5060 -> phone_ip:61335 BYE sip:sip@phone_ip:61335 SIP/2.0. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK1f0a75ed;rport. From: ;tag=as63e17e20. To: sip_username ;tag=89bf3223f61753o0. Call-ID: d0012663-7f62b013@192.168.0.8. CSeq: 103 BYE. User-Agent: Asterisk PBX. Max-Forwards: 70. Content-Length: 0. . # U phone_ip:61335 -> server_ip:5060 SIP/2.0 200 OK. To: sip_username ;tag=89bf3223f61753o0. From: ;tag=as63e17e20. Call-ID: d0012663-7f62b013@192.168.0.8. CSeq: 103 BYE. Via: SIP/2.0/UDP server_ip:5060;branch=z9hG4bK1f0a75ed. Server: phone-3.1.4(a). Content-Length: 0.