[Serusers] Need help with Record-Route

Jan Janak jan at iptel.org
Wed Nov 19 23:40:22 CET 2003


Hello,

did you uncomment the loose_route() statement as well ? Can you send me
also ser logs ?

  Jan.

On 19-11 16:23, Garey, Tim wrote:
> I am using ser 0.8.11 with redhat 9. I am not using mysql or authentication 
> and currently have a pretty simple config due to my limited programming
> skills.
> I have orig phone A registered to SER and have SER rewriting A's INVITES so
> our 
> softswitch will be happy. Terminating phone B is registered to our
> softswitch.
> 
> Phone A can call a phone B and 2 way voice is established. Phone B can 
> terminate the call and the session will end. All is ok until I try and
> use Record-Route (by removing comment #) in my ser.cfg below.
> 
> Using Record-Route, when the terminating phone answers, the 200 OK
> will propagate all the way through SER and to the originating phone but
> at this point the ACK will not get sent back by SER. Because of
> this our softswitch will continue to send the 200 OK and after some time
> it gives up and terminates both legs with BYE's. Please reference the
> attached sip_scenario trace file (which has end packets removed to conserve
> space)
> 
> Could someone suggest how I might use Record-Route properly?
> 
> Thanks in advance!
> 
> Tim
> =========================================
> 
> (10.16.1.218) is SER registered phone who initiates call
> 10.16.1.147 is SER
> 172.17.4.102 is our softswitch acting as back2back user agent.
> (10.16.1.214) is softswitch registered phone answers/terminates call.
> ================================================
> Here is routing logic:
> 
> # main routing logic
> 
> route{
> 
> 	# initial sanity checks -- messages with
> 	# max_forwards==0, or excessively long requests
> 	if (!mf_process_maxfwd_header("10")) {
> 		sl_send_reply("483","Too Many Hops");
> 		break;
> 	};
> 	if (len_gt( max_len )) {
> 		sl_send_reply("513", "Message too big");
> 		break;
> 	};
> 
> 	if (method=="INVITE") {
> 		rewritehostport("172.17.4.102");
> 	#	record_route();
> 		t_relay();
> 	#	forward (172.17.4.102, 5060);
> 	};
> 
> 	# we record-route all messages -- to make sure that
> 	# subsequent messages will go through our proxy; that's
> 	# particularly good if upstream and downstream entities
> 	# use different transport protocol
> 	#record_route();	
> 	# loose-route processing
> 	#if (loose_route()) {
> 	#	t_relay();
> 	#	break;
> 	#};
> 
> 	# if the request is for other domain use UsrLoc
> 	# (in case, it does not work, use the following command
> 	# with proper names and addresses in it)
> 	if (uri==myself) {
> 
> 		if (method=="REGISTER") {
> 
> # Uncomment this if you want to use digest authentication
> #			if (!www_authorize("iptel.org", "subscriber")) {
> #				www_challenge("iptel.org", "0");
> #				break;
> #			};
> 
> 			save("location");
> 			break;
> 		};
> 
> 		# native SIP destinations are handled using our USRLOC DB
> 		if (!lookup("location")) {
> 			sl_send_reply("404", "Not Found");
> 			break;
> 		};
> 	};
> 	# forward to current uri now; use stateful forwarding; that
> 	# works reliably even if we forward from TCP to UDP
> 	#if (!t_relay()) {
> 	#	sl_reply_error();
> 	#};
> 
> }
> 
>  <<test3.txt>> 
> 
> 
> 
> 
> 

> Sip Scenario Trace
> 
> File: test3.dump
> Generated: Wed Nov 19 16:05:42 2003
> Traced on: Wed Nov 19 15:49:04 2003
> Created by:sip_scenario version=1.1.0 
> 
>                                                           
> 10.16.1.218        10.16.1.147        172.17.4.102       10.16.1.214
> |                  |                  |                  | <Call><PFrame><Time>
> |                  |                  |                  |
> | F1 INVITE (sdp)  |                  |                  |
> |>---------------->|                  |                  |  1 PF:1   15:49:4.9232
> |                  |                  |                  |
> | ant to us 100 F2 |                  |                  |
> |<----------------<|                  |                  |  1 PF:2   15:49:4.9242
> |                  |                  |                  |
> |                  | F3 INVITE (sdp)  |                  |
> |                  |>---------------->|                  |  1 PF:5   15:49:4.9254
> |                  |                  |                  |
> |                  |    Trying 100 F4 |                  |
> |                  |<----------------<|                  |  1 PF:6   15:49:4.9333
> |                  |                  |                  |
> |                  |                  | F5 INVITE (sdp)  |
> |                  |                  |>---------------->|  2 PF:7   15:49:4.9384
> |                  |                  |                  |
> |                  |                  |   Ringing 180 F6 |
> |                  |                  |<----------------<|  2 PF:8   15:49:5.3980
> |                  |                  |                  |
> |                  |   Ringing 180 F7 |                  |
> |                  |<----------------<|                  |  1 PF:9   15:49:5.4040
> |                  |                  |                  |
> |   Ringing 180 F8 |                  |                  |
> |<----------------<|                  |                  |  1 PF:10  15:49:5.4047
> |                  |                  |                  |
> |                  |                  |  (sdp) OK 200 F9 |
> |                  |                  |<----------------<|  2 PF:11  15:49:9.4794
> |                  |                  |                  |
> |                  |                  | F10 ACK          |
> |                  |                  |>---------------->|  2 PF:12  15:49:9.4854
> |                  |                  |                  |
> |                  | (sdp) OK 200 F11 |                  |
> |                  |<----------------<|                  |  1 PF:13  15:49:9.4883
> |                  |                  |                  |
> | (sdp) OK 200 F12 |                  |                  |
> |<----------------<|                  |                  |  1 PF:14  15:49:9.4892
> |                  |                  |                  |
> | F13 ACK          |                  |                  |
> |>---------------->|                  |                  |  1 PF:15  15:49:9.8257
> |                  |                  |                  |
> |                  | (sdp) OK 200 F14 |                  |
> |                  |<----------------<|                  |  1 PF:18  15:49:9.9930
> |                  |                  |                  |
> | (sdp) OK 200 F15 |                  |                  |
> |<----------------<|                  |                  |  1 PF:19  15:49:9.9938
> |                  |                  |                  |
> | F16 ACK          |                  |                  |
> |>---------------->|                  |                  |  1 PF:20  15:49:10.0412
> |                  |                  |                  |
> |                  | (sdp) OK 200 F17 |                  |
> |                  |<----------------<|                  |  1 PF:21  15:49:11.0032
> |                  |                  |                  |
> | (sdp) OK 200 F18 |                  |                  |
> |<----------------<|                  |                  |  1 PF:22  15:49:11.0041
> |                  |                  |                  |
> | F19 ACK          |                  |                  |
> |>---------------->|                  |                  |  1 PF:23  15:49:11.0503
> |                  |                  |                  |
> |                  | (sdp) OK 200 F20 |                  |
> |                  |<----------------<|                  |  1 PF:24  15:49:13.0137
> 
> ================================================================================
> 
>      SIP MESSAGE 1        10.16.1.218:5060() -> 10.16.1.147:5060()
>      UDP Frame 1        19/Nov/03 15:49:4.9232 TimeFromPreviousSipFrame=0.0000 TimeFromStart=0.0000 
> INVITE sip:6032251114 at 10.16.1.147:5060 SIP/2.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> To: sip:6032251114 at 10.16.1.147:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> CSeq: 1745607253 INVITE 
> Supported: timer 
> Min-SE: 5 
> Content-Type: application/sdp 
> Content-Length: 220 
> Contact: 6037534033 <sip:6037534033 at 10.16.1.218:5060> 
> Supported: replaces 
>  
> v=0 
> o=MxSIP 0 1069207096 IN IP4 10.16.1.218 
> s=SIP Call 
> c=IN IP4 10.16.1.218 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 4 100 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> a=rtpmap:4 G723/8000 
> a=rtpmap:100 telephone-event/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 2        10.16.1.147:5060() -> 10.16.1.218:5060()
>      UDP Frame 2        19/Nov/03 15:49:4.9242 TimeFromPreviousSipFrame=0.0010 TimeFromStart=0.0010 
> SIP/2.0 100 trying -- your call is important to us 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> To: sip:6032251114 at 10.16.1.147:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> CSeq: 1745607253 INVITE 
> Server: Sip EXpress router (0.8.11 (i386/linux)) 
> Content-Length: 0 
> Warning: 392 10.16.1.147:5060 "Noisy feedback tells:  pid=29065 req_src_ip=10.16.1.218 req_src_port=5060 in_uri=sip:6032251114 at 10.16.1.147:5060 out_uri=sip:6032251114 at 172.17.4.102 via_cnt==1" 
>  
> 
> ================================================================================
> 
>      SIP MESSAGE 3        10.16.1.147:5060() -> 172.17.4.102:5060()
>      UDP Frame 5        19/Nov/03 15:49:4.9254 TimeFromPreviousSipFrame=0.0011 TimeFromStart=0.0021 
> INVITE sip:6032251114 at 172.17.4.102 SIP/2.0 
> Max-Forwards: 10 
> Record-Route: <sip:6032251114 at 10.16.1.147;ftag=2d19a0f24373be0;lr> 
> Via: SIP/2.0/UDP 10.16.1.147;branch=z9hG4bKc8d4.0c28a9f.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> To: sip:6032251114 at 10.16.1.147:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> CSeq: 1745607253 INVITE 
> Supported: timer 
> Min-SE: 5 
> Content-Type: application/sdp 
> Content-Length: 220 
> Contact: 6037534033 <sip:6037534033 at 10.16.1.218:5060> 
> Supported: replaces 
>  
> v=0 
> o=MxSIP 0 1069207096 IN IP4 10.16.1.218 
> s=SIP Call 
> c=IN IP4 10.16.1.218 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 4 100 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> a=rtpmap:4 G723/8000 
> a=rtpmap:100 telephone-event/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 4        172.17.4.102:5060() -> 10.16.1.147:5060()
>      UDP Frame 6        19/Nov/03 15:49:4.9333 TimeFromPreviousSipFrame=0.0080 TimeFromStart=0.0101 
> SIP/2.0 100 Trying 
> Via: SIP/2.0/UDP 10.16.1.147;branch=z9hG4bKc8d4.0c28a9f.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
>  
> 
> ================================================================================
> 
>      SIP MESSAGE 5        172.17.4.102:5060() -> 10.16.1.214:5060()
>      UDP Frame 7        19/Nov/03 15:49:4.9384 TimeFromPreviousSipFrame=0.0051 TimeFromStart=0.0152 
> INVITE sip:6032251114 at 10.16.1.214 SIP/2.0 
> From: "6037534033" <sip:6037534033 at 172.17.4.102>;tag=1069274873-5907151069865588-11 
> To: <sip:6032251114 at 10.16.1.214;user=phone> 
> Via: SIP/2.0/UDP 172.17.4.102:5060;branch=z9hG4bKSNCLLC1069865708 
> CSeq: 18 INVITE 
> Contact: sip:6037534033 at 172.17.4.102:5060 
> Call-ID: 3784729601-2740955435689601-11 
> Max-Forwards: 70 
> Supported: 100rel 
> Allow: REGISTER, INVITE, ACK, BYE, CANCEL, NOTIFY, REFER 
> Content-Type: application/sdp 
> Content-Length: 157 
>  
> v=0 
> o=MxSIP 0 1069207096 IN IP4 10.16.1.218 
> s=SIP Call 
> c=IN IP4 10.16.1.218 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 6        10.16.1.214:5060() -> 172.17.4.102:5060()
>      UDP Frame 8        19/Nov/03 15:49:5.3980 TimeFromPreviousSipFrame=0.4596 TimeFromStart=0.4748 
> SIP/2.0 180 Ringing 
> Call-ID: 3784729601-2740955435689601-11 
> CSeq: 18 INVITE 
> From: "6037534033" <sip:6037534033 at 172.17.4.102>;tag=1069274873-5907151069865588-11 
> To: <sip:6032251114 at 10.16.1.214;user=phone>;tag=39cabed15d76494 
> Via: SIP/2.0/UDP 172.17.4.102:5060;branch=z9hG4bKSNCLLC1069865708 
> Content-Length: 0 
> Contact: 6032251114 <sip:6032251114 at 10.16.1.214:5060> 
>  
> 
> ================================================================================
> 
>      SIP MESSAGE 7        172.17.4.102:5060() -> 10.16.1.147:5060()
>      UDP Frame 9        19/Nov/03 15:49:5.4040 TimeFromPreviousSipFrame=0.0060 TimeFromStart=0.4808 
> SIP/2.0 180 Ringing 
> Via: SIP/2.0/UDP 10.16.1.147;branch=z9hG4bKc8d4.0c28a9f.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> Contact: sip:6037534033 at 172.17.4.102:5060 
>  
> 
> ================================================================================
> 
>      SIP MESSAGE 8        10.16.1.147:5060() -> 10.16.1.218:5060()
>      UDP Frame 10       19/Nov/03 15:49:5.4047 TimeFromPreviousSipFrame=0.0007 TimeFromStart=0.4815 
> SIP/2.0 180 Ringing 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> Contact: sip:6037534033 at 172.17.4.102:5060 
>  
> 
> ================================================================================
> 
>      SIP MESSAGE 9        10.16.1.214:5060() -> 172.17.4.102:5060()
>      UDP Frame 11       19/Nov/03 15:49:9.4794 TimeFromPreviousSipFrame=4.0747 TimeFromStart=4.5562 
> SIP/2.0 200 OK 
> Call-ID: 3784729601-2740955435689601-11 
> CSeq: 18 INVITE 
> From: "6037534033" <sip:6037534033 at 172.17.4.102>;tag=1069274873-5907151069865588-11 
> To: <sip:6032251114 at 10.16.1.214;user=phone>;tag=39cabed15d76494 
> Via: SIP/2.0/UDP 172.17.4.102:5060;branch=z9hG4bKSNCLLC1069865708 
> Content-Length: 156 
> Content-Type: application/sdp 
> Supported: replaces 
> Contact: 6032251114 <sip:6032251114 at 10.16.1.214:5060> 
>  
> v=0 
> o=MxSIP 0 519532447 IN IP4 10.16.1.214 
> s=SIP Call 
> c=IN IP4 10.16.1.214 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 10       172.17.4.102:5060() -> 10.16.1.214:5060()
>      UDP Frame 12       19/Nov/03 15:49:9.4854 TimeFromPreviousSipFrame=0.0060 TimeFromStart=4.5621 
> ACK sip:6032251114 at 10.16.1.214:5060 SIP/2.0 
> From: "6037534033" <sip:6037534033 at 172.17.4.102>;tag=1069274873-5907151069865588-11 
> To: <sip:6032251114 at 10.16.1.214;user=phone>;tag=39cabed15d76494 
> Via: SIP/2.0/UDP 172.17.4.102:5060;branch=z9hG4bKSNCLLC1069865708 
> Max-Forwards: 70 
> CSeq: 18 ACK 
> Call-ID: 3784729601-2740955435689601-11 
> Contact: sip:6037534033 at 172.17.4.102:5060 
> Content-Length: 0 
>  
> 
> ================================================================================
> 
>      SIP MESSAGE 11       172.17.4.102:5060() -> 10.16.1.147:5060()
>      UDP Frame 13       19/Nov/03 15:49:9.4883 TimeFromPreviousSipFrame=0.0029 TimeFromStart=4.5651 
> SIP/2.0 200 OK 
> Via: SIP/2.0/UDP 10.16.1.147;branch=z9hG4bKc8d4.0c28a9f.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> Contact: sip:6037534033 at 172.17.4.102:5060 
> Allow: REGISTER, INVITE, ACK, BYE, CANCEL, NOTIFY, REFER 
> Content-Type: application/sdp 
> Content-Length: 156 
>  
> v=0 
> o=MxSIP 0 519532447 IN IP4 10.16.1.214 
> s=SIP Call 
> c=IN IP4 10.16.1.214 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 12       10.16.1.147:5060() -> 10.16.1.218:5060()
>      UDP Frame 14       19/Nov/03 15:49:9.4892 TimeFromPreviousSipFrame=0.0009 TimeFromStart=4.5659 
> SIP/2.0 200 OK 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> Contact: sip:6037534033 at 172.17.4.102:5060 
> Allow: REGISTER, INVITE, ACK, BYE, CANCEL, NOTIFY, REFER 
> Content-Type: application/sdp 
> Content-Length: 156 
>  
> v=0 
> o=MxSIP 0 519532447 IN IP4 10.16.1.214 
> s=SIP Call 
> c=IN IP4 10.16.1.214 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 13       10.16.1.218:5060() -> 10.16.1.147:5060()
>      UDP Frame 15       19/Nov/03 15:49:9.8257 TimeFromPreviousSipFrame=0.3365 TimeFromStart=4.9024 
> ACK sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr SIP/2.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> To: sip:6032251114 at 10.16.1.147:5060;tag=1069274873-5853181069860191-11 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> CSeq: 1745607253 ACK 
> Route: <sip:6037534033 at 172.17.4.102:5060> 
> Content-Length: 0 
> Contact: 6037534033 <sip:6037534033 at 10.16.1.218:5060> 
>  
> 
> ================================================================================
> 
>      SIP MESSAGE 14       172.17.4.102:5060() -> 10.16.1.147:5060()
>      UDP Frame 18       19/Nov/03 15:49:9.9930 TimeFromPreviousSipFrame=0.1673 TimeFromStart=5.0698 
> SIP/2.0 200 OK 
> Via: SIP/2.0/UDP 10.16.1.147;branch=z9hG4bKc8d4.0c28a9f.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> Contact: sip:6037534033 at 172.17.4.102:5060 
> Allow: REGISTER, INVITE, ACK, BYE, CANCEL, NOTIFY, REFER 
> Content-Type: application/sdp 
> Content-Length: 156 
>  
> v=0 
> o=MxSIP 0 519532447 IN IP4 10.16.1.214 
> s=SIP Call 
> c=IN IP4 10.16.1.214 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 15       10.16.1.147:5060() -> 10.16.1.218:5060()
>      UDP Frame 19       19/Nov/03 15:49:9.9938 TimeFromPreviousSipFrame=0.0008 TimeFromStart=5.0706 
> SIP/2.0 200 OK 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> Contact: sip:6037534033 at 172.17.4.102:5060 
> Allow: REGISTER, INVITE, ACK, BYE, CANCEL, NOTIFY, REFER 
> Content-Type: application/sdp 
> Content-Length: 156 
>  
> v=0 
> o=MxSIP 0 519532447 IN IP4 10.16.1.214 
> s=SIP Call 
> c=IN IP4 10.16.1.214 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 16       10.16.1.218:5060() -> 10.16.1.147:5060()
>      UDP Frame 20       19/Nov/03 15:49:10.0412 TimeFromPreviousSipFrame=0.0474 TimeFromStart=5.1180 
> ACK sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr SIP/2.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> To: sip:6032251114 at 10.16.1.147:5060;tag=1069274873-5853181069860191-11 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> CSeq: 1745607253 ACK 
> Route: <sip:6037534033 at 172.17.4.102:5060> 
> Content-Length: 0 
> Contact: 6037534033 <sip:6037534033 at 10.16.1.218:5060> 
>  
> 
> ================================================================================
> 
>      SIP MESSAGE 17       172.17.4.102:5060() -> 10.16.1.147:5060()
>      UDP Frame 21       19/Nov/03 15:49:11.0032 TimeFromPreviousSipFrame=0.9620 TimeFromStart=6.0799 
> SIP/2.0 200 OK 
> Via: SIP/2.0/UDP 10.16.1.147;branch=z9hG4bKc8d4.0c28a9f.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> Contact: sip:6037534033 at 172.17.4.102:5060 
> Allow: REGISTER, INVITE, ACK, BYE, CANCEL, NOTIFY, REFER 
> Content-Type: application/sdp 
> Content-Length: 156 
>  
> v=0 
> o=MxSIP 0 519532447 IN IP4 10.16.1.214 
> s=SIP Call 
> c=IN IP4 10.16.1.214 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 18       10.16.1.147:5060() -> 10.16.1.218:5060()
>      UDP Frame 22       19/Nov/03 15:49:11.0041 TimeFromPreviousSipFrame=0.0009 TimeFromStart=6.0808 
> SIP/2.0 200 OK 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> Contact: sip:6037534033 at 172.17.4.102:5060 
> Allow: REGISTER, INVITE, ACK, BYE, CANCEL, NOTIFY, REFER 
> Content-Type: application/sdp 
> Content-Length: 156 
>  
> v=0 
> o=MxSIP 0 519532447 IN IP4 10.16.1.214 
> s=SIP Call 
> c=IN IP4 10.16.1.214 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> 
> ================================================================================
> 
>      SIP MESSAGE 19       10.16.1.218:5060() -> 10.16.1.147:5060()
>      UDP Frame 23       19/Nov/03 15:49:11.0503 TimeFromPreviousSipFrame=0.0462 TimeFromStart=6.1270 
> ACK sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr SIP/2.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> To: sip:6032251114 at 10.16.1.147:5060;tag=1069274873-5853181069860191-11 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> CSeq: 1745607253 ACK 
> Route: <sip:6037534033 at 172.17.4.102:5060> 
> Content-Length: 0 
> Contact: 6037534033 <sip:6037534033 at 10.16.1.218:5060> 
>  
> 
> ================================================================================
> 
>      SIP MESSAGE 20       172.17.4.102:5060() -> 10.16.1.147:5060()
>      UDP Frame 24       19/Nov/03 15:49:13.0137 TimeFromPreviousSipFrame=1.9634 TimeFromStart=8.0904 
> SIP/2.0 200 OK 
> Via: SIP/2.0/UDP 10.16.1.147;branch=z9hG4bKc8d4.0c28a9f.0 
> Via: SIP/2.0/UDP 10.16.1.218:5060 
> From: 6037534033 <sip:6037534033 at 10.16.1.147:5060>;tag=2d19a0f24373be0 
> To: <sip:6032251114 at 10.16.1.147:5060>;tag=1069274873-5853181069860191-11 
> Record-Route: <sip:6032251114 at 10.16.1.147:5060;ftag=2d19a0f24373be0;lr> 
> CSeq: 1745607253 INVITE 
> Call-ID: 5d4fb4526189224bb30809f6c7086e87 at 10.16.1.147 
> Contact: sip:6037534033 at 172.17.4.102:5060 
> Allow: REGISTER, INVITE, ACK, BYE, CANCEL, NOTIFY, REFER 
> Content-Type: application/sdp 
> Content-Length: 156 
>  
> v=0 
> o=MxSIP 0 519532447 IN IP4 10.16.1.214 
> s=SIP Call 
> c=IN IP4 10.16.1.214 
> t=0 0 
> m=audio 5010 RTP/AVP 0 8 
> a=rtpmap:0 PCMU/8000 
> a=rtpmap:8 PCMA/8000 
> 

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