[cisco-voip] RTP packets in a VoIP network.

[Voll, Scott]

Any way to use the protocol analyzer on GW1?

Span the port on GW1.  this would give you the whole RTP stream.  It will have to different destination streams but you could piece it back together.

Scott

-----Original Message-----
From: Leo Zicovich [mailto:leozicovich at yahoo.co.uk] 
Sent: Friday, December 09, 2005 9:28 AM
To: Voll, Scott; cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] RTP packets in a VoIP network.

Hi Scott,

Basically, the scenario is: PSTN ---> GW1---> IVR
(transfer in a Bridge mode) --->GW1 ---> PSTN. Using
H323.

And what I need is to get the RTP packets for a single
conversation in order to be saved in a file to be
played later. So, what I am trying to do is use a
protocol analyzer on the IVR to get that.
Unfortunately, I just get the RTP traffic for  PSTN
---> GW1---> IVR, after the transfer all the RTP
traffic is intra GW1.
Is there any way to configure the cisco in the way to
remain the IVR in the connection for the duration of
the call, so all the RTP traffic? Do you know another
way to do that?

Many thank,

Regards,
Leo


--- "Voll, Scott" <Scott.Voll at wesd.org> wrote:

> If I'm understanding you correctly the call setup is
> setting up the first leg (which you can get) and
> then the second leg brakes it.  The RTP stream
> starts from GW1 to IVR then after the transfer the
> RTP stream is from GW1 to GW2.
> 
> I'm not sure how your are getting your Capture but
> look for the RTP stream from GW1 to GW2.
> 
> Scott
> 
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On
> Behalf Of Leo Zicovich
> Sent: Friday, December 09, 2005 3:28 AM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] RTP packets in a VoIP network.
> 
> Hello all,
> 
> I am working in a VoIP network and I have a question
> using tethereal to get the RTP packets to saved them
> in a file to be played later. 
> 
> I use cisco AS5400 with an IVR (just to do a
> transfer
> in a  Bridge transfer mode. The IVR adds the callee
> to
> the connection and remains in the connection for the
> duration of the transferred call):  GW1/2 --> IVR
> -->
> GW1/2, and I am trying to use tethereal command line
> on the IVR, but I get only the UDP/RTP packet's for
> the first connection (GW1 --> IVR), as soon as the
> transfer is done (IVR --> GW1/2) and the
> communication
> established, nothing is captured. was it enough
> clear?
> I hope so.
> 
> Anyone know why is it happening? And how can I get
> all
> the communication UDP/RTP packet´s?
> 
> Many thank in advance
> 
> regards,
> 
> Leo
> 
> 
> 
> 		
>
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