[SR-Users] Missing ACK

Fri Jul 2 15:54:43 CEST 2010

> > > > Hi, I have a similar issue,
> > > 
> > > It is not possible to debug this issue without full SIP trace!
> > > 
> > > ngrep -Wbyline -t -d any port 5060
> 
> I find it unpleasant to read such a trace. Please really use ngrep to get a
> nice formated SIP trace, or supply the pcap file.
> 

Ok, here it goes again.

Pay attention to the "200: OK" response from the PSTN-GW. I think its Contact 
header should be read by the Cisco GW (calling party), and then send its 
ACK-request with R-URI based on that Contact. But it doesn't happen. Then here i 
think this is the failure. (rfc3261, section 12.1.1 and 12.2.1.2). May i am 
wrong..

What do you think?
I'd appreciate your comments.

Caio
-------------- next part --------------
input: call_ack_fail.pcap
#
U 10.10.10.128:5060 -> 10.15.15.122:5060
INVITE sip:123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
From: 33344408 <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Supported: .
Min-SE: 1800.
Cisco-Guid: 2766969578-3162693393-2680946713-3118917430.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REGISTER.
CSeq: 101 INVITE.
Max-Forwards: 68.
Remote-Party-ID: "33344408"<sip:33344408 at 10.10.10.128:5060>;party=calling;privacy=off;screen=yes.
Timestamp: 1277906174.
Contact: <sip:33344408 at 10.10.10.128:5060;transport=udp>.
Expires: 180.
Allow-Events: telephone-event.
Content-Type: application/sdp.
Content-Length: 371.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Accept: application/sdp, application/gtd.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 8377 1687 IN IP4 10.10.10.128.
s=SIP Call.
c=IN IP4 10.10.10.128.
t=0 0.
m=audio 32014 RTP/AVP 8 0 18 4 101.
c=IN IP4 10.10.10.128.
a=rtpmap:8 PCMA/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:18 G729/8000.
a=fmtp:18 annexb=no.
a=rtpmap:4 G723/8000.
a=fmtp:4 bitrate=6.3;annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 100 trying -- your call is important to us.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
From: 33344408 <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
CSeq: 101 INVITE.
Server: Sip EXpress router (0.9.7 (i386/solaris)).
Content-Length: 0.
Warning: 392 10.15.15.122:5060 "Noisy feedback tells:  pid=28489 req_src_ip=10.10.10.128 req_src_port=5060 in_uri=sip:123456 at 10.15.15.122:5060 out_uri=sip:96123456 at 10.20.20.153:5060 via_cnt==1".
.

#
U 10.15.15.122:5060 -> 10.20.20.153:5060
INVITE sip:96123456 at 10.20.20.153:5060 SIP/2.0.
Record-Route: <sip:10.15.15.122;ftag=SDrp99a01-92528878-1A90;lr=on>.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
From: 33344408 <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Supported: .
Min-SE: 1800.
Cisco-Guid: 2766969578-3162693393-2680946713-3118917430.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REGISTER.
CSeq: 101 INVITE.
Max-Forwards: 16.
Remote-Party-ID: "33344408"<sip:33344408 at 10.10.10.128:5060>;party=calling;privacy=off;screen=yes.
Timestamp: 1277906174.
Contact: <sip:33344408 at 10.10.10.128:5060;transport=udp>.
Expires: 180.
Allow-Events: telephone-event.
Content-Type: application/sdp.
Content-Length: 371.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Accept: application/sdp, application/gtd.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 8377 1687 IN IP4 10.10.10.128.
s=SIP Call.
c=IN IP4 10.10.10.128.
t=0 0.
m=audio 32014 RTP/AVP 8 0 18 4 101.
c=IN IP4 10.10.10.128.
a=rtpmap:8 PCMA/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:18 G729/8000.
a=fmtp:18 annexb=no.
a=rtpmap:4 G723/8000.
a=fmtp:4 bitrate=6.3;annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Timestamp: 1277906174 .
Content-Length: 0.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 183 Session Progress.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 483 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 183 Session Progress.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 483 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bKe213.6f13.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bK3q6t66206gh16hst42a1.1.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
CSeq: 101 INVITE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, INFO, NOTIFY, REFER, MESSAGE, UPDATE.
Contact: <sip:96123456 at 10.20.20.153:5060>.
Content-Type: application/sdp.
Supported: replaces, norefersub, timer.
Min-SE: 90.
Session-Expires: 1800;refresher=uas.
Server: PSTN-GW/v5.1.5 (MIDIGW).
Content-Length: 248.
.
v=0.
o=- 250 484 IN IP4 10.20.20.153.
s=-.
c=IN IP4 10.20.20.153.
t=0 0.
m=audio 6022 RTP/AVP 8 0 18 101.
a=rtpmap:8 PCMA/8000.
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.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
ACK sip:96123456 at 10.15.15.122:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.10.10.128:5060;branch=z9hG4bKaiekdf104g6gchgul2e1.1.
From: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
To: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
Date: Wed, 30 Jun 2010 13:56:14 GMT.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Max-Forwards: 68.
CSeq: 101 ACK.
Content-Length: 0.
User-Agent: ProxySIP (1.4.2-notls (i386/linux)).
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
.

#
U 10.20.20.153:5060 -> 10.15.15.122:5060
BYE sip:33344408 at 10.10.10.128:5060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP 10.20.20.153:5060;rport;branch=z9hG4bKEPSVBUS89f51f01-1efb-4ecf-a032-44027524d7ce.
To: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
From: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
CSeq: 285 BYE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
User-Agent: PSTN-GW/v5.1.5 (MIDIGW).
Max-Forwards: 70.
Route: <sip:10.15.15.122;lr=on;ftag=SDrp99a01-92528878-1A90>.
Content-Length: 0.
.

#
U 10.15.15.122:5060 -> 10.10.10.128:5060
BYE sip:33344408 at 10.10.10.128:5060;transport=UDP SIP/2.0.
Record-Route: <sip:10.15.15.122;ftag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d;lr=on>.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bK2c99.d733.0.
Via: SIP/2.0/UDP 10.20.20.153:5060;rport=5060;branch=z9hG4bKEPSVBUS89f51f01-1efb-4ecf-a032-44027524d7ce.
To: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
From: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
CSeq: 285 BYE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
User-Agent: PSTN-GW/v5.1.5 (MIDIGW).
Max-Forwards: 16.
Content-Length: 0.
P-hint: rr-enforced.
.

#
U 10.10.10.128:5060 -> 10.15.15.122:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.15.15.122;branch=z9hG4bK2c99.d733.0.
Via: SIP/2.0/UDP 10.20.20.153:5060;rport=5060;branch=z9hG4bKEPSVBUS89f51f01-1efb-4ecf-a032-44027524d7ce.
To: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
From: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
CSeq: 285 BYE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;ftag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d;lr=on>.
Server: ProxySIP (1.4.2-notls (i386/linux)).
Content-Length: 0.
.

#
U 10.15.15.122:5060 -> 10.20.20.153:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.20.20.153:5060;rport=5060;branch=z9hG4bKEPSVBUS89f51f01-1efb-4ecf-a032-44027524d7ce.
To: "33344408" <sip:33344408 at 10.10.10.128:5060>;tag=SDrp99a01-92528878-1A90.
From: <sip:123456 at 10.15.15.122>;tag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d.
CSeq: 285 BYE.
Call-ID: SDrp99a01-97ec97ecc1bce7b80524fef2c3644cdb-ulkf820.
Record-Route: <sip:10.15.15.122;ftag=1268972986d6546921-c0f0-46ed-80de-4baa48ea613d;lr=on>.
Server: ProxySIP (1.4.2-notls (i386/linux)).
Content-Length: 0.
.

exit