Hi,
I have a number of users behind cisco ADSL routers which have ALG on by
default, and are causing problems.
If I ask the broadband company to add:
no ip nat service sip udp port 5060
no ip nat service H225
to the general config on their Ciscos everything works ok, but getting
them to change each one individually is a pain, and I know some SIP
carriers are working fine even with the ALG on.
There are a few errors that happen, one is a 19 second call cut.
The invite is sent, authenticated and connected to the PSTN, but when the
cisco-gateway sends the 200-OK to say the call is connected things go
wrong:
1.2.3.201 = Openser proxy
1.2.3.204 = Cisco gateway
81.1.2.218 = User agent IP.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
U 81.1.2.218:2020 -> 1.2.3.201:5060
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
U 1.2.3.201:5060 -> 81.1.2.218:2021
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.2.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
So for some reason the ACK sent by the useragent is:
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
instead of:
ACK sip:[EMAIL PROTECTED]:5060 SIP/2.0.
so openser sends the ACK back to the useragent instead of to the cisco
gateway.
The cisco gateway then keeps sending the 200 OKs because it is not getting
the reply, and finally the call times out after 19 seconds and the cisco
send a BYE.
The full trace is attached.
Sometimes this problem does not occur, but the same thing happens with the
final BYE, so the useragent sends:
BYE sip:[EMAIL PROTECTED]:2022 SIP/2.0.
instead of:
BYE sip:[EMAIL PROTECTED]:5060 SIP/2.0.
So openser sends the BYE back to the useragent instead of to the gateway.
Sorry for the long mail, and thanks for any pointers.
Richard
1.2.3.201 = Openser proxy
1.2.3.204 = Cisco gateway
81.1.2.218 = User agent IP.
U 81.1.2.218:2020 -> 1.2.3.201:5060
INVITE sip:[EMAIL PROTECTED] SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-21460b8b.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>.
Call-ID: [EMAIL PROTECTED]
CSeq: 101 INVITE.
Max-Forwards: 70.
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
Expires: 240.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 252.
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER.
Supported: x-sipura.
Content-Type: application/sdp.
.
v=0.
o=- 18539 18539 IN IP4 192.168.1.6.
s=-.
c=IN IP4 81.1.2.218.
t=0 0.
m=audio 16468 RTP/AVP 4 100 101.
a=rtpmap:4 G723/8000.
a=rtpmap:100 NSE/8000.
a=fmtp:100 192-193.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=sendrecv.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 407 Proxy Authentication Required.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-21460b8b.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=9df88149756df0cbffcc8c4447862715.8d93.
Call-ID: [EMAIL PROTECTED]
CSeq: 101 INVITE.
Proxy-Authenticate: Digest realm="sip.example.com",
nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4".
Server: OpenSer (1.1.0-notls (i386/linux)).
Content-Length: 0.
Warning: 392 1.2.3.201:5060 "Noisy feedback tells: pid=15647
req_src_ip=81.1.2.218 req_src_port=2020 in_uri=sip:[EMAIL PROTECTED]
out_uri=sip:[EMAIL PROTECTED] via_cnt==1".
.
U 81.1.2.218:2020 -> 1.2.3.201:5060
ACK sip:[EMAIL PROTECTED] SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-21460b8b.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=9df88149756df0cbffcc8c4447862715.8d93.
Call-ID: [EMAIL PROTECTED]
CSeq: 101 ACK.
Max-Forwards: 70.
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 81.1.2.218:2020 -> 1.2.3.201:5060
INVITE sip:[EMAIL PROTECTED] SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 INVITE.
Max-Forwards: 70.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]",algorithm=MD5,response="e038a957ab555bc5a6734800164115b6".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
Expires: 240.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 252.
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER.
Supported: x-sipura.
Content-Type: application/sdp.
.
v=0.
o=- 18539 18539 IN IP4 192.168.1.6.
s=-.
c=IN IP4 81.1.2.218.
t=0 0.
m=audio 16468 RTP/AVP 4 100 101.
a=rtpmap:4 G723/8000.
a=rtpmap:100 NSE/8000.
a=fmtp:100 192-193.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=sendrecv.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 100 trying -- your call is important to us.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 INVITE.
Server: OpenSer (1.1.0-notls (i386/linux)).
Content-Length: 0.
Warning: 392 1.2.3.201:5060 "Noisy feedback tells: pid=15676
req_src_ip=81.1.2.218 req_src_port=2020 in_uri=sip:[EMAIL PROTECTED]
out_uri=sip:[EMAIL PROTECTED] via_cnt==1".
.
U 1.2.3.201:5060 -> 1.2.3.204:5060
INVITE sip:[EMAIL PROTECTED] SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 INVITE.
Max-Forwards: 69.
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
Expires: 240.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 252.
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER.
Supported: x-sipura.
Content-Type: application/sdp.
.
v=0.
o=- 18539 18539 IN IP4 192.168.1.6.
s=-.
c=IN IP4 1.2.3.201.
t=0 0.
m=audio 61504 RTP/AVP 4 100 101.
a=rtpmap:4 G723/8000.
a=rtpmap:100 NSE/8000.
a=fmtp:100 192-193.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=sendrecv.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow-Events: telephone-event.
Content-Length: 0.
.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 183 Session Progress.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Disposition: session;handling=required.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.204.
t=0 0.
m=audio 17204 RTP/AVP 4 101.
c=IN IP4 1.2.3.204.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 183 Session Progress.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Disposition: session;handling=required.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.201.
t=0 0.
m=audio 61504 RTP/AVP 4 101.
c=IN IP4 1.2.3.201.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.204.
t=0 0.
m=audio 17204 RTP/AVP 4 101.
c=IN IP4 1.2.3.204.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.201.
t=0 0.
m=audio 61504 RTP/AVP 4 101.
c=IN IP4 1.2.3.201.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 81.1.2.218:2020 -> 1.2.3.201:5060
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 70.
Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.201:5060 -> 81.1.2.218:2021
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.2.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 69.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.204.
t=0 0.
m=audio 17204 RTP/AVP 4 101.
c=IN IP4 1.2.3.204.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.201.
t=0 0.
m=audio 61504 RTP/AVP 4 101.
c=IN IP4 1.2.3.201.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 81.1.2.218:2020 -> 1.2.3.201:5060
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 70.
Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.201:5060 -> 81.1.2.218:2021
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.2.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 69.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.204.
t=0 0.
m=audio 17204 RTP/AVP 4 101.
c=IN IP4 1.2.3.204.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.201.
t=0 0.
m=audio 61504 RTP/AVP 4 101.
c=IN IP4 1.2.3.201.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 81.1.2.218:2020 -> 1.2.3.201:5060
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 70.
Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.201:5060 -> 81.1.2.218:2021
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.2.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 69.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.204.
t=0 0.
m=audio 17204 RTP/AVP 4 101.
c=IN IP4 1.2.3.204.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.201.
t=0 0.
m=audio 61504 RTP/AVP 4 101.
c=IN IP4 1.2.3.201.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 81.1.2.218:2020 -> 1.2.3.201:5060
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 70.
Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.201:5060 -> 81.1.2.218:2021
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.2.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 69.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.204.
t=0 0.
m=audio 17204 RTP/AVP 4 101.
c=IN IP4 1.2.3.204.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.201.
t=0 0.
m=audio 61504 RTP/AVP 4 101.
c=IN IP4 1.2.3.201.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 81.1.2.218:2020 -> 1.2.3.201:5060
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 70.
Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.201:5060 -> 81.1.2.218:2021
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.2.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 69.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.204.
t=0 0.
m=audio 17204 RTP/AVP 4 101.
c=IN IP4 1.2.3.204.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.201.
t=0 0.
m=audio 61504 RTP/AVP 4 101.
c=IN IP4 1.2.3.201.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 81.1.2.218:2020 -> 1.2.3.201:5060
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 70.
Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.201:5060 -> 81.1.2.218:2021
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.2.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 69.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.204:51431 -> 1.2.3.201:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.0,SIP/2.0/UDP
81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.204.
t=0 0.
m=audio 17204 RTP/AVP 4 101.
c=IN IP4 1.2.3.204.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 1.2.3.201:5060 -> 81.1.2.218:2020
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-13d1535f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 102 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE,
NOTIFY, INFO, UPDATE, REGISTER.
Allow-Events: telephone-event.
Contact: <sip:[EMAIL PROTECTED]:5060>.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Content-Type: application/sdp.
Content-Length: 294.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 1869 2060 IN IP4 1.2.3.204.
s=SIP Call.
c=IN IP4 1.2.3.201.
t=0 0.
m=audio 61504 RTP/AVP 4 101.
c=IN IP4 1.2.3.201.
a=rtpmap:4 G723/8000.
a=fmtp:4 annexa=no.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=direction:passive.
U 81.1.2.218:2020 -> 1.2.3.201:5060
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 70.
Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.201:5060 -> 81.1.2.218:2021
ACK sip:[EMAIL PROTECTED]:2021 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bKf233.b0309086.2.
Via: SIP/2.0/UDP 81.1.2.218:2020;branch=z9hG4bK-a8d9ae6f.
From: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
To: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 102 ACK.
Max-Forwards: 69.
Proxy-Authorization: Digest
username="101000000",realm="sip.example.com",nonce="4721d74d797d2fcdae92fc29db4798914ddb90a4",uri="sip:[EMAIL
PROTECTED]:2021",algorithm=MD5,response="d0a6ac0edaabb7fca6ef3ff448c7c4e1".
Contact: %5 <sip:[EMAIL PROTECTED]:2020>.
User-Agent: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.204:51431 -> 1.2.3.201:5060
BYE sip:[EMAIL PROTECTED]:2020 SIP/2.0.
Via: SIP/2.0/UDP 1.2.3.204:5060;branch=z9hG4bKD3B675E.
From: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
To: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
User-Agent: Cisco-SIPGateway/IOS-12.x.
Max-Forwards: 70.
Route: <sip:1.2.3.201;lr=on;ftag=32750c901739579ao0>.
Timestamp: 1193399881.
CSeq: 101 BYE.
Content-Length: 0.
.
U 1.2.3.201:5060 -> 81.1.2.218:2020
BYE sip:[EMAIL PROTECTED]:2020 SIP/2.0.
Record-Route: <sip:1.2.3.201;lr=on;ftag=F48836B0-608>.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bK2333.35ada747.0.
Via: SIP/2.0/UDP 1.2.3.204:5060;branch=z9hG4bKD3B675E.
From: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
To: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
Date: Fri, 26 Oct 2007 11:57:22 GMT.
Call-ID: [EMAIL PROTECTED]
User-Agent: Cisco-SIPGateway/IOS-12.x.
Max-Forwards: 69.
Timestamp: 1193399881.
CSeq: 101 BYE.
Content-Length: 0.
.
U 81.1.2.218:2020 -> 1.2.3.201:5060
SIP/2.0 200 OK.
To: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
From: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 101 BYE.
Via: SIP/2.0/UDP 1.2.3.201;branch=z9hG4bK2333.35ada747.0.
Via: SIP/2.0/UDP 1.2.3.204:5060;branch=z9hG4bKD3B675E.
Record-Route: <sip:1.2.3.201;lr=on;ftag=F48836B0-608>.
Timestamp: 1193399881.
Server: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
.
U 1.2.3.201:5060 -> 1.2.3.204:5060
SIP/2.0 200 OK.
To: %5 <sip:[EMAIL PROTECTED]>;tag=32750c901739579ao0.
From: <sip:[EMAIL PROTECTED]>;tag=F48836B0-608.
Call-ID: [EMAIL PROTECTED]
CSeq: 101 BYE.
Via: SIP/2.0/UDP 1.2.3.204:5060;branch=z9hG4bKD3B675E.
Record-Route: <sip:1.2.3.201;lr=on;ftag=F48836B0-608>.
Timestamp: 1193399881.
Server: Linksys/PAP2T-3.1.15(LS).
Content-Length: 0.
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