[asterisk-users] Cisco AS5300 and Digium g729A codec

2012-01-09 Thread Roi Stork
Hi,

We have a problem connecting to a Cisco AS5300 trunk.

We set the sip peer to allow only g729. The call attempt is able to
connect, but when answered, no audio is heard or transmitted.

Our asterisk version is 1.6.2.14 . Codec is licensed, bought from Digium.

We do not have this problem on our other providers using asterisk and other
non-cisco systems.
Anyone else having this same problem?
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Re: [asterisk-users] Cisco AS5300 and Digium g729A codec

2012-01-09 Thread Alex Balashov
You are hereby encouraged to post your AS5300 IOS config, sip.conf peer 
declaration, and packet capture. Those three things would aid greatly in 
diagnosis, especially the capture.

--
This message was painstakingly thumbed out on my mobile, so apologies for 
brevity, errors, and general sloppiness.

Alex Balashov - Principal
Evariste Systems LLC
260 Peachtree Street NW
Suite 2200
Atlanta, GA 30303
Tel: +1-678-954-0670
Fax: +1-404-961-1892
Web: http://www.evaristesys.com/

On Jan 9, 2012, at 3:20 AM, Roi Stork roi.st...@gmail.com wrote:

 Hi,
 
 We have a problem connecting to a Cisco AS5300 trunk.
 
 We set the sip peer to allow only g729. The call attempt is able to connect, 
 but when answered, no audio is heard or transmitted.
 
 Our asterisk version is 1.6.2.14 . Codec is licensed, bought from Digium.
 
 We do not have this problem on our other providers using asterisk and other 
 non-cisco systems.
 Anyone else having this same problem?
 --
 _
 -- Bandwidth and Colocation Provided by http://www.api-digital.com --
 New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello
 
 asterisk-users mailing list
 To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users


Re: [asterisk-users] Cisco AS5300 and Digium g729A codec

2012-01-09 Thread Roi Stork
Hi Alex, here's the config and the sip debug output.

Guide:
xxx.xxx.xxx.xxx - the provider's cisco as5300 trunk ip add
yyy.yy.yy.yy - our asterisk 1.6.2.14 server

sip config:

type=peer
disallow=all
allow=g729
host=xxx.xxx.xxx.xxx
fromdomain=xxx.xxx.xxx.xxx
dtmfmode=rfc2833
nat=no
canreinvite=yes
context=from-trunk-sip-iaccess

sip debug:
v=0
o=root 249777024 249777024 IN IP4 yyy.yy.yy.yy
s=Asterisk PBX 1.6.2.14
c=IN IP4 yyy.yy.yy.yy
t=0 0
m=audio 13702 RTP/AVP 0 8 3 18 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:3 GSM/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=sendrecv

---

--- SIP read from UDP:xxx.xxx.xxx.xxx:5060 ---
SIP/2.0 100 Trying
Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK60c02567;rport
From: 6598715968 sip:6598715...@yyy.yy.yy.yy;tag=as6e218907
To: sip:34546598715...@xxx.xxx.xxx.xxx
Date: Fri, 06 Jan 2012 04:51:39 GMT
Call-ID: 7e54da423b0e6e457475ab17694e5...@yyy.yy.yy.yy
Server: Cisco-SIPGateway/IOS-12.x
CSeq: 102 INVITE
Allow-Events: telephone-event
Content-Length: 0


-
--- (10 headers 0 lines) ---
Retransmitting #3 (no NAT) to zzz.zz.zz.zz:5060:
OPTIONS sip:zzz.zz.zz.zz SIP/2.0
Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK78129860;rport
Max-Forwards: 70
From: Unknown sip:unkn...@yyy.yy.yy.yy;tag=as5c8e3f97
To: sip:zzz.zz.zz.zz
Contact: sip:unkn...@yyy.yy.yy.yy
Call-ID: 7bdb028f789e3afa58b22db472d9d...@yyy.yy.yy.yy
CSeq: 102 OPTIONS
User-Agent: Asterisk PBX 1.6.2.14
Date: Fri, 06 Jan 2012 06:23:00 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
Supported: replaces, timer
Content-Length: 0


---

--- SIP read from UDP:69.90.209.57:5060 ---

-
Retransmitting #4 (no NAT) to zzz.zz.zz.zz:5060:
OPTIONS sip:zzz.zz.zz.zz SIP/2.0
Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK78129860;rport
Max-Forwards: 70
From: Unknown sip:unkn...@yyy.yy.yy.yy;tag=as5c8e3f97
To: sip:zzz.zz.zz.zz
Contact: sip:unkn...@yyy.yy.yy.yy
Call-ID: 7bdb028f789e3afa58b22db472d9d...@yyy.yy.yy.yy
CSeq: 102 OPTIONS
User-Agent: Asterisk PBX 1.6.2.14
Date: Fri, 06 Jan 2012 06:23:00 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
Supported: replaces, timer
Content-Length: 0


---
Really destroying SIP dialog '7bdb028f789e3afa58b22db472d9d...@yyy.yy.yy.yy'
Method: OPTIONS

--- SIP read from UDP:xxx.xxx.xxx.xxx:5060 ---
SIP/2.0 183 Session Progress
Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK60c02567;rport
From: 6598715968 sip:6598715...@yyy.yy.yy.yy;tag=as6e218907
To: sip:34546598715...@xxx.xxx.xxx.xxx;tag=B6534850-EC6
Date: Fri, 06 Jan 2012 04:51:39 GMT
Call-ID: 7e54da423b0e6e457475ab17694e5...@yyy.yy.yy.yy
Server: Cisco-SIPGateway/IOS-12.x
CSeq: 102 INVITE
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE,
NOTIFY, INFO, REGISTER
Allow-Events: telephone-event
Remote-Party-ID: 6598715968

sip:1234#6598715...@xxx.xxx.xxx.xxx;party=called;screen=no;privacy=off
Contact: sip:34546598715...@xxx.xxx.xxx.xxx:5060
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 223

v=0
o=CiscoSystemsSIP-GW-UserAgent 6911 3862 IN IP4 xxx.xxx.xxx.xxx
s=SIP Call
c=IN IP4 xxx.xxx.xxx.xxx
t=0 0
m=audio 18132 RTP/AVP 18
c=IN IP4 xxx.xxx.xxx.xxx
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=ptime:20

-
--- (15 headers 10 lines) ---
Found RTP audio format 18
Found audio description format G729 for ID 18
Capabilities: us - 0x10e (gsm|ulaw|alaw|g729), peer - audio=0x100
(g729)/video=0x0

(nothing)/text=0x0 (nothing), combined - 0x100 (g729)
Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x0
(nothing), combined - 0x0

(nothing)
Peer audio RTP is at port xxx.xxx.xxx.xxx:18132

--- SIP read from UDP:xxx.xxx.xxx.xxx:5060 ---
SIP/2.0 200 OK
Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK60c02567;rport
From: 6598715968 sip:6598715...@yyy.yy.yy.yy;tag=as6e218907
To: sip:34546598715...@xxx.xxx.xxx.xxx;tag=B6534850-EC6
Date: Fri, 06 Jan 2012 04:51:39 GMT
Call-ID: 7e54da423b0e6e457475ab17694e5...@yyy.yy.yy.yy
Server: Cisco-SIPGateway/IOS-12.x
CSeq: 102 INVITE
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE,
NOTIFY, INFO, REGISTER
Allow-Events: telephone-event
Contact: sip:34546598715...@xxx.xxx.xxx.xxx:5060
Supported: replaces
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 223

v=0
o=CiscoSystemsSIP-GW-UserAgent 6911 3862 IN IP4 xxx.xxx.xxx.xxx
s=SIP Call
c=IN IP4 xxx.xxx.xxx.xxx
t=0 0
m=audio 18132 RTP/AVP 18
c=IN IP4 xxx.xxx.xxx.xxx
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=ptime:20

-
--- (15 headers 10 lines) ---
list_route: hop: sip:34546598715...@xxx.xxx.xxx.xxx:5060
set_destination: Parsing sip:34546598715...@xxx.xxx.xxx.xxx:5060 for
address/port to send to
set_destination: set destination to xxx.xxx.xxx.xxx, port 5060
Transmitting (no NAT) to xxx.xxx.xxx.xxx:5060:
ACK sip:34546598715...@xxx.xxx.xxx.xxx:5060 

Re: [asterisk-users] Cisco AS5300 and Digium g729A codec

2012-01-09 Thread Roi Stork
Here's the cisco AS5300 settings from our provider

codec preference 1 g729r8
codec preference 2 g729br8
codec preference 3 g723r53
codec preference 4 g723r63
codec preference 5 g723ar53
codec preference 6 g723ar63

On Mon, Jan 9, 2012 at 5:18 PM, Roi Stork roi.st...@gmail.com wrote:

 Hi Alex, here's the config and the sip debug output.

 Guide:
 xxx.xxx.xxx.xxx - the provider's cisco as5300 trunk ip add
 yyy.yy.yy.yy - our asterisk 1.6.2.14 server

 sip config:

 type=peer
 disallow=all
 allow=g729
 host=xxx.xxx.xxx.xxx
 fromdomain=xxx.xxx.xxx.xxx
 dtmfmode=rfc2833
 nat=no
 canreinvite=yes
 context=from-trunk-sip-iaccess

 sip debug:
 v=0
 o=root 249777024 249777024 IN IP4 yyy.yy.yy.yy
 s=Asterisk PBX 1.6.2.14
 c=IN IP4 yyy.yy.yy.yy
 t=0 0
 m=audio 13702 RTP/AVP 0 8 3 18 101
 a=rtpmap:0 PCMU/8000
 a=rtpmap:8 PCMA/8000
 a=rtpmap:3 GSM/8000
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=no
 a=rtpmap:101 telephone-event/8000
 a=fmtp:101 0-16
 a=ptime:20
 a=sendrecv

 ---

 --- SIP read from UDP:xxx.xxx.xxx.xxx:5060 ---
 SIP/2.0 100 Trying
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK60c02567;rport
 From: 6598715968 sip:6598715...@yyy.yy.yy.yy;tag=as6e218907
 To: sip:34546598715...@xxx.xxx.xxx.xxx
 Date: Fri, 06 Jan 2012 04:51:39 GMT
 Call-ID: 7e54da423b0e6e457475ab17694e5...@yyy.yy.yy.yy
 Server: Cisco-SIPGateway/IOS-12.x
 CSeq: 102 INVITE
 Allow-Events: telephone-event
 Content-Length: 0


 -
 --- (10 headers 0 lines) ---
 Retransmitting #3 (no NAT) to zzz.zz.zz.zz:5060:
 OPTIONS sip:zzz.zz.zz.zz SIP/2.0
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK78129860;rport
 Max-Forwards: 70
 From: Unknown sip:unkn...@yyy.yy.yy.yy;tag=as5c8e3f97
 To: sip:zzz.zz.zz.zz
 Contact: sip:unkn...@yyy.yy.yy.yy
 Call-ID: 7bdb028f789e3afa58b22db472d9d...@yyy.yy.yy.yy
 CSeq: 102 OPTIONS
 User-Agent: Asterisk PBX 1.6.2.14
 Date: Fri, 06 Jan 2012 06:23:00 GMT
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
 Supported: replaces, timer
 Content-Length: 0


 ---

 --- SIP read from UDP:69.90.209.57:5060 ---

 -
 Retransmitting #4 (no NAT) to zzz.zz.zz.zz:5060:
 OPTIONS sip:zzz.zz.zz.zz SIP/2.0
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK78129860;rport
 Max-Forwards: 70
 From: Unknown sip:unkn...@yyy.yy.yy.yy;tag=as5c8e3f97
 To: sip:zzz.zz.zz.zz
 Contact: sip:unkn...@yyy.yy.yy.yy
 Call-ID: 7bdb028f789e3afa58b22db472d9d...@yyy.yy.yy.yy
 CSeq: 102 OPTIONS
 User-Agent: Asterisk PBX 1.6.2.14
 Date: Fri, 06 Jan 2012 06:23:00 GMT
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
 Supported: replaces, timer
 Content-Length: 0


 ---
 Really destroying SIP dialog '7bdb028f789e3afa58b22db472d9d...@yyy.yy.yy.yy'
 Method: OPTIONS

 --- SIP read from UDP:xxx.xxx.xxx.xxx:5060 ---
 SIP/2.0 183 Session Progress
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK60c02567;rport
 From: 6598715968 sip:6598715...@yyy.yy.yy.yy;tag=as6e218907
 To: sip:34546598715...@xxx.xxx.xxx.xxx;tag=B6534850-EC6
 Date: Fri, 06 Jan 2012 04:51:39 GMT
 Call-ID: 7e54da423b0e6e457475ab17694e5...@yyy.yy.yy.yy
 Server: Cisco-SIPGateway/IOS-12.x
 CSeq: 102 INVITE
 Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE,
 NOTIFY, INFO, REGISTER
 Allow-Events: telephone-event
 Remote-Party-ID: 6598715968

 sip:1234#6598715...@xxx.xxx.xxx.xxx;party=called;screen=no;privacy=off
 Contact: sip:34546598715...@xxx.xxx.xxx.xxx:5060
 Content-Type: application/sdp
 Content-Disposition: session;handling=required
 Content-Length: 223

 v=0
 o=CiscoSystemsSIP-GW-UserAgent 6911 3862 IN IP4 xxx.xxx.xxx.xxx
 s=SIP Call
 c=IN IP4 xxx.xxx.xxx.xxx
 t=0 0
 m=audio 18132 RTP/AVP 18
 c=IN IP4 xxx.xxx.xxx.xxx
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=no
 a=ptime:20

 -
 --- (15 headers 10 lines) ---
 Found RTP audio format 18
 Found audio description format G729 for ID 18
 Capabilities: us - 0x10e (gsm|ulaw|alaw|g729), peer - audio=0x100
 (g729)/video=0x0

 (nothing)/text=0x0 (nothing), combined - 0x100 (g729)
 Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x0
 (nothing), combined - 0x0

 (nothing)
 Peer audio RTP is at port xxx.xxx.xxx.xxx:18132

 --- SIP read from UDP:xxx.xxx.xxx.xxx:5060 ---
 SIP/2.0 200 OK
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK60c02567;rport
 From: 6598715968 sip:6598715...@yyy.yy.yy.yy;tag=as6e218907
 To: sip:34546598715...@xxx.xxx.xxx.xxx;tag=B6534850-EC6
 Date: Fri, 06 Jan 2012 04:51:39 GMT
 Call-ID: 7e54da423b0e6e457475ab17694e5...@yyy.yy.yy.yy
 Server: Cisco-SIPGateway/IOS-12.x
 CSeq: 102 INVITE
 Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE,
 NOTIFY, INFO, REGISTER
 Allow-Events: telephone-event
 Contact: sip:34546598715...@xxx.xxx.xxx.xxx:5060
 Supported: replaces
 Content-Type: application/sdp
 Content-Disposition: session;handling=required
 Content-Length: 223

 v=0
 o=CiscoSystemsSIP-GW-UserAgent 6911 3862 IN IP4 xxx.xxx.xxx.xxx
 s=SIP Call
 c=IN IP4 xxx.xxx.xxx.xxx
 t=0 0
 m=audio 18132 RTP/AVP 18
 

Re: [asterisk-users] Cisco AS5300 and Digium g729A codec

2012-01-09 Thread Roi Stork
The problem has been fixed.

We are able to hear audio in our calls after adding these lines in the
AS5300 config:

sip-ua
g729-annexb override

There's an issue regarding codec matching in IOS versions 12.3(18) or higher:
https://supportforums.cisco.com/docs/DOC-3186


On Tue, Jan 10, 2012 at 10:30 AM, Roi Stork roi.st...@gmail.com wrote:

 Here's the cisco AS5300 settings from our provider

 codec preference 1 g729r8
 codec preference 2 g729br8
 codec preference 3 g723r53
 codec preference 4 g723r63
 codec preference 5 g723ar53
 codec preference 6 g723ar63

 On Mon, Jan 9, 2012 at 5:18 PM, Roi Stork roi.st...@gmail.com wrote:

 Hi Alex, here's the config and the sip debug output.

 Guide:
 xxx.xxx.xxx.xxx - the provider's cisco as5300 trunk ip add
 yyy.yy.yy.yy - our asterisk 1.6.2.14 server

 sip config:

 type=peer
 disallow=all
 allow=g729
 host=xxx.xxx.xxx.xxx
 fromdomain=xxx.xxx.xxx.xxx
 dtmfmode=rfc2833
 nat=no
 canreinvite=yes
 context=from-trunk-sip-iaccess

 sip debug:
 v=0
 o=root 249777024 249777024 IN IP4 yyy.yy.yy.yy
 s=Asterisk PBX 1.6.2.14
 c=IN IP4 yyy.yy.yy.yy
 t=0 0
 m=audio 13702 RTP/AVP 0 8 3 18 101
 a=rtpmap:0 PCMU/8000
 a=rtpmap:8 PCMA/8000
 a=rtpmap:3 GSM/8000
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=no
 a=rtpmap:101 telephone-event/8000
 a=fmtp:101 0-16
 a=ptime:20
 a=sendrecv

 ---

 --- SIP read from UDP:xxx.xxx.xxx.xxx:5060 ---
 SIP/2.0 100 Trying
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK60c02567;rport
 From: 6598715968 sip:6598715...@yyy.yy.yy.yy;tag=as6e218907
 To: sip:34546598715...@xxx.xxx.xxx.xxx
 Date: Fri, 06 Jan 2012 04:51:39 GMT
 Call-ID: 7e54da423b0e6e457475ab17694e5...@yyy.yy.yy.yy
 Server: Cisco-SIPGateway/IOS-12.x
 CSeq: 102 INVITE
 Allow-Events: telephone-event
 Content-Length: 0


 -
 --- (10 headers 0 lines) ---
 Retransmitting #3 (no NAT) to zzz.zz.zz.zz:5060:
 OPTIONS sip:zzz.zz.zz.zz SIP/2.0
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK78129860;rport
 Max-Forwards: 70
 From: Unknown sip:unkn...@yyy.yy.yy.yy;tag=as5c8e3f97
 To: sip:zzz.zz.zz.zz
 Contact: sip:unkn...@yyy.yy.yy.yy
 Call-ID: 7bdb028f789e3afa58b22db472d9d...@yyy.yy.yy.yy
 CSeq: 102 OPTIONS
 User-Agent: Asterisk PBX 1.6.2.14
 Date: Fri, 06 Jan 2012 06:23:00 GMT
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
 Supported: replaces, timer
 Content-Length: 0


 ---

 --- SIP read from UDP:69.90.209.57:5060 ---

 -
 Retransmitting #4 (no NAT) to zzz.zz.zz.zz:5060:
 OPTIONS sip:zzz.zz.zz.zz SIP/2.0
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK78129860;rport
 Max-Forwards: 70
 From: Unknown sip:unkn...@yyy.yy.yy.yy;tag=as5c8e3f97
 To: sip:zzz.zz.zz.zz
 Contact: sip:unkn...@yyy.yy.yy.yy
 Call-ID: 7bdb028f789e3afa58b22db472d9d...@yyy.yy.yy.yy
 CSeq: 102 OPTIONS
 User-Agent: Asterisk PBX 1.6.2.14
 Date: Fri, 06 Jan 2012 06:23:00 GMT
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
 Supported: replaces, timer
 Content-Length: 0


 ---
 Really destroying SIP dialog '7bdb028f789e3afa58b22db472d9d...@yyy.yy.yy.yy' 
 Method: OPTIONS

 --- SIP read from UDP:xxx.xxx.xxx.xxx:5060 ---
 SIP/2.0 183 Session Progress
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK60c02567;rport
 From: 6598715968 sip:6598715...@yyy.yy.yy.yy;tag=as6e218907
 To: sip:34546598715...@xxx.xxx.xxx.xxx;tag=B6534850-EC6
 Date: Fri, 06 Jan 2012 04:51:39 GMT
 Call-ID: 7e54da423b0e6e457475ab17694e5...@yyy.yy.yy.yy
 Server: Cisco-SIPGateway/IOS-12.x
 CSeq: 102 INVITE
 Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, 
 NOTIFY, INFO, REGISTER
 Allow-Events: telephone-event
 Remote-Party-ID: 6598715968

 sip:1234#6598715...@xxx.xxx.xxx.xxx;party=called;screen=no;privacy=off
 Contact: sip:34546598715...@xxx.xxx.xxx.xxx:5060
 Content-Type: application/sdp
 Content-Disposition: session;handling=required
 Content-Length: 223

 v=0
 o=CiscoSystemsSIP-GW-UserAgent 6911 3862 IN IP4 xxx.xxx.xxx.xxx
 s=SIP Call
 c=IN IP4 xxx.xxx.xxx.xxx
 t=0 0
 m=audio 18132 RTP/AVP 18
 c=IN IP4 xxx.xxx.xxx.xxx
 a=rtpmap:18 G729/8000
 a=fmtp:18 annexb=no
 a=ptime:20

 -
 --- (15 headers 10 lines) ---
 Found RTP audio format 18
 Found audio description format G729 for ID 18
 Capabilities: us - 0x10e (gsm|ulaw|alaw|g729), peer - audio=0x100 
 (g729)/video=0x0

 (nothing)/text=0x0 (nothing), combined - 0x100 (g729)
 Non-codec capabilities (dtmf): us - 0x1 (telephone-event), peer - 0x0 
 (nothing), combined - 0x0

 (nothing)
 Peer audio RTP is at port xxx.xxx.xxx.xxx:18132

 --- SIP read from UDP:xxx.xxx.xxx.xxx:5060 ---
 SIP/2.0 200 OK
 Via: SIP/2.0/UDP yyy.yy.yy.yy:5060;branch=z9hG4bK60c02567;rport
 From: 6598715968 sip:6598715...@yyy.yy.yy.yy;tag=as6e218907
 To: sip:34546598715...@xxx.xxx.xxx.xxx;tag=B6534850-EC6
 Date: Fri, 06 Jan 2012 04:51:39 GMT
 Call-ID: 7e54da423b0e6e457475ab17694e5...@yyy.yy.yy.yy
 Server: Cisco-SIPGateway/IOS-12.x
 CSeq: 102 INVITE
 Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, 
 NOTIFY, INFO,