157.190.74.153:4386 -> 157.190.74.152:5060 INVITE sip:2092@157.190.74.152 SIP/2.0..Via: SIP/2.0/UDP 157.190.74.153:130 13..Max-Forwards: 70..From: "3500@157.190.74.152" ;tag=dfecb666e90841d5be89eead630afeb8;epid=7cd02a8407..To: ..Call-ID: 15d487d4809b4b55a9a432ddee90befa@157.190.74.153..CSeq: 1 INVITE..Contact: ..User-Agent: RTC/1.2..Content -Type: application/sdp..Content-Length: 527....v=0..o=- 0 0 IN IP4 157.190. 74.153..s=session..c=IN IP4 157.190.74.153..b=CT:1000..t=0 0..m=audio 33736 RTP/AVP 97 111 112 6 0 8 4 5 3 101..k=base64:T5tWyiyMW9DJIn5L5HU7nBedhKgRA KUyH9lM+0cMKxs..a=rtpmap:97 red/8000..a=rtpmap:111 SIREN/16000..a=fmtp:111 bitrate=16000..a=rtpmap:112 G7221/16000..a=fmtp:112 bitrate=24000..a=rtpmap :6 DVI4/16000..a=rtpmap:0 PCMU/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:4 G723/ 8000..a=rtpmap:5 DVI4/8000..a=rtpmap:3 GSM/8000..a=rtpmap:101 telephone-eve nt/8000..a=fmtp:101 0-16..a=encryption:optional.. # U 157.190.74.152:5060 -> 157.190.74.153:13013 SIP/2.0 407 Proxy Authentication Required..Via: SIP/2.0/UDP 157.190.74.153: 13013..From: "3500@157.190.74.152" ;tag=dfecb666e9 0841d5be89eead630afeb8;epid=7cd02a8407..To: ;tag=b 27e1a1d33761e85846fc98f5f3a7e58.c807..Call-ID: 15d487d4809b4b55a9a432ddee90 befa@157.190.74.153..CSeq: 1 INVITE..Proxy-Authenticate: Digest realm="157. 190.74.152", nonce="432a924048cccef20ad6ae4dcda6c7b1c60644ad"..Server: Sip EXpress router (0.9.3 (i386/linux))..Content-Length: 0..Warning: 392 157.19 0.74.152:5060 "Noisy feedback tells: pid=1970 req_src_ip=157.190.74.153 re q_src_port=4386 in_uri=sip:2092@157.190.74.152 out_uri=sip:2092@157.190.74. 152 via_cnt==1".... # U 157.190.74.153:4386 -> 157.190.74.152:5060 ACK sip:2092@157.190.74.152 SIP/2.0..Via: SIP/2.0/UDP 157.190.74.153:13013. .Max-Forwards: 70..From: "3500@157.190.74.152" ;ta g=dfecb666e90841d5be89eead630afeb8;epid=7cd02a8407..To: ;tag=b27e1a1d33761e85846fc98f5f3a7e58.c807..Call-ID: 15d487d4809b4b55 a9a432ddee90befa@157.190.74.153..CSeq: 1 ACK..User-Agent: RTC/1.2..Content- Length: 0.... # U 157.190.74.153:4386 -> 157.190.74.152:5060 INVITE sip:2092@157.190.74.152 SIP/2.0..Via: SIP/2.0/UDP 157.190.74.153:130 13..Max-Forwards: 70..From: "3500@157.190.74.152" ;tag=dfecb666e90841d5be89eead630afeb8;epid=7cd02a8407..To: ..Call-ID: 15d487d4809b4b55a9a432ddee90befa@157.190.74.153..CSeq: 2 INVITE..Contact: ..User-Agent: RTC/1.2..Proxy-A uthorization: Digest username="3500", realm="157.190.74.152", algorithm=md5 , uri="sip:2092@157.190.74.152", nonce="432a924048cccef20ad6ae4dcda6c7b1c60 644ad", response="164fffc48441785b986d26e6e84f44b3"..Content-Type: applicat ion/sdp..Content-Length: 527....v=0..o=- 0 0 IN IP4 157.190.74.153..s=sessi on..c=IN IP4 157.190.74.153..b=CT:1000..t=0 0..m=audio 33736 RTP/AVP 97 111 112 6 0 8 4 5 3 101..k=base64:T5tWyiyMW9DJIn5L5HU7nBedhKgRAKUyH9lM+0cMKxs. .a=rtpmap:97 red/8000..a=rtpmap:111 SIREN/16000..a=fmtp:111 bitrate=16000.. a=rtpmap:112 G7221/16000..a=fmtp:112 bitrate=24000..a=rtpmap:6 DVI4/16000.. a=rtpmap:0 PCMU/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:4 G723/8000..a=rtpmap: 5 DVI4/8000..a=rtpmap:3 GSM/8000..a=rtpmap:101 telephone-event/8000..a=fmtp :101 0-16..a=encryption:optional.. # U 157.190.74.152:5060 -> 157.190.74.153:4386 SIP/2.0 100 trying -- your call is important to us..Via: SIP/2.0/UDP 157.19 0.74.153:13013;rport=4386..From: "3500@157.190.74.152" ;tag=dfecb666e90841d5be89eead630afeb8;epid=7cd02a8407..To: ..Call-ID: 15d487d4809b4b55a9a432ddee90befa@157.190.74.153..C Seq: 2 INVITE..Server: Sip EXpress router (0.9.3 (i386/linux))..Content-Len gth: 0..Warning: 392 157.190.74.152:5060 "Noisy feedback tells: pid=1971 r eq_src_ip=157.190.74.153 req_src_port=4386 in_uri=sip:2092@157.190.74.152 o ut_uri=sip:2092@157.190.74.151 via_cnt==1".... # U 157.190.74.152:5060 -> 157.190.74.151:5060 INVITE sip:2092@157.190.74.151 SIP/2.0..Record-Route: ..Via: SIP/2.0/UDP 157.190.74.15 2;branch=z9hG4bK9387.f9ad92b5.0..Via: SIP/2.0/UDP 157.190.74.153:13013;rpor t=4386..Max-Forwards: 16..From: "3500@157.190.74.152" ;tag=dfecb666e90841d5be89eead630afeb8;epid=7cd02a8407..To: ..Call-ID: 15d487d4809b4b55a9a432ddee90befa@157.190.74.153..CS eq: 2 INVITE..Contact: ..User-Agent: RTC/1.2..Cont ent-Type: application/sdp..Content-Length: 545....v=0..o=- 0 0 IN IP4 157.1 90.74.153..s=session..c=IN IP4 157.190.74.152..b=CT:1000..t=0 0..m=audio 35 012 RTP/AVP 97 111 112 6 0 8 4 5 3 101..k=base64:T5tWyiyMW9DJIn5L5HU7nBedhK gRAKUyH9lM+0cMKxs..a=rtpmap:97 red/8000..a=rtpmap:111 SIREN/16000..a=fmtp:1 11 bitrate=16000..a=rtpmap:112 G7221/16000..a=fmtp:112 bitrate=24000..a=rtp map:6 DVI4/16000..a=rtpmap:0 PCMU/8000..a=rtpmap:8 PCMA/8000..a=rtpmap:4 G7 23/8000..a=rtpmap:5 DVI4/8000..a=rtpmap:3 GSM/8000..a=rtpmap:101 telephone- event/8000..a=fmtp:101 0-16..a=encryption:optional..a=nortpproxy:yes.. # U 157.190.74.151:5060 -> 157.190.74.152:5060 SIP/2.0 100 Trying..Via: SIP/2.0/UDP 157.190.74.152;branch=z9hG4bK9387.f9ad 92b5.0..Via: SIP/2.0/UDP 157.190.74.153:13013;rport=4386..From: "3500@157.1 90.74.152" ;tag=dfecb666e90841d5be89eead630afeb8;e pid=7cd02a8407..To: ..Call-ID: 15d487d4809b4b55a9a 432ddee90befa@157.190.74.153..CSeq: 2 INVITE..User-Agent: Grandstream BT100 1.0.6.7..Content-Length: 0.... # U 157.190.74.151:5060 -> 157.190.74.152:5060 SIP/2.0 486 Busy..Via: SIP/2.0/UDP 157.190.74.152;branch=z9hG4bK9387.f9ad92 b5.0..Via: SIP/2.0/UDP 157.190.74.153:13013;rport=4386..Record-Route: ..From: "3500@15 7.190.74.152" ;tag=dfecb666e90841d5be89eead630afeb 8;epid=7cd02a8407..To: ;tag=15f1aec3b76086f0..Call -ID: 15d487d4809b4b55a9a432ddee90befa@157.190.74.153..CSeq: 2 INVITE..User- Agent: Grandstream BT100 1.0.6.7..Content-Length: 0.... # U 157.190.74.152:5060 -> 157.190.74.151:5060 ACK sip:2092@157.190.74.151 SIP/2.0..Via: SIP/2.0/UDP 157.190.74.152;branch =z9hG4bK9387.f9ad92b5.0..From: "3500@157.190.74.152" ;tag=dfecb666e90841d5be89eead630afeb8;epid=7cd02a8407..Call-ID: 15d487d4 809b4b55a9a432ddee90befa@157.190.74.153..To: ;tag= 15f1aec3b76086f0..CSeq: 2 ACK..User-Agent: Sip EXpress router(0.9.3 (i386/l inux))..Content-Length: 0.... # U 157.190.74.152:5060 -> 157.190.74.153:4386 SIP/2.0 407 Proxy Authentication Required..Via: SIP/2.0/UDP 157.190.74.153: 13013;rport=4386..From: "3500@157.190.74.152" ;tag =dfecb666e90841d5be89eead630afeb8;epid=7cd02a8407..To: ;tag=b27e1a1d33761e85846fc98f5f3a7e58.002b..Call-ID: 15d487d4809b4b55a 9a432ddee90befa@157.190.74.153..CSeq: 2 INVITE..Proxy-Authenticate: Digest realm="157.190.74.152", nonce="432a924048cccef20ad6ae4dcda6c7b1c60644ad"..S erver: Sip EXpress router (0.9.3 (i386/linux))..Content-Length: 0..Warning: 392 157.190.74.152:5060 "Noisy feedback tells: pid=1969 req_src_ip=157.19 0.74.152 req_src_port=5060 in_uri=sip:2009@157.190.74.152 out_uri=sip:2009@ 157.190.74.152 via_cnt==2".... # U 157.190.74.153:4386 -> 157.190.74.152:5060 ACK sip:2092@157.190.74.152 SIP/2.0..Via: SIP/2.0/UDP 157.190.74.153:13013. .Max-Forwards: 70..From: "3500@157.190.74.152" ;ta g=dfecb666e90841d5be89eead630afeb8;epid=7cd02a8407..To: ;tag=b27e1a1d33761e85846fc98f5f3a7e58.002b..Call-ID: 15d487d4809b4b55 a9a432ddee90befa@157.190.74.153..CSeq: 2 ACK..User-Agent: RTC/1.2..Content- Length: 0....