[SIPForum-discussion] RFC 2833 RTP Event

[Pradeep J]

Hi,
You can capture the RTP packets by taking the ethereal trace ..
The ethereal tool can be downloaded from www.winshark.com

Cheers,
Pradeep

On 6/20/07, amit <amit.v at pyronetworks.com> wrote:
>
>  Hi Onur,
>
> you are right easy to decode the digit from the incoming RTP  packets. But
> i am not able to capture these RTP packets.
>
> How I can capture these Packets Help me
>
> Thank you in advance.
>
>        Amit
>
>
>
> On Wed, 2007-06-20 at 13:21 +0300, Onur Cinar wrote:
>
>
> Hi Amit,
>
> Actually if you take a look at the RFC 2833 you should be able to easily
> decode the digit from the incoming packets. The payload is 32 bits:
>
> 8 bits  for event
> 1 bit  E flag
> 1 bit  R flag
> 6 bits volume
> 16 bits duration (in ms)
>
> The first 8 bits hold the digit that you are looking for. Take a look at
> section 3.10 for the values.
>
> Although you are only interested in the digits,
> take E flag in to account as well in order to make sure that you won't count the same digit more
> than one time.
>
> Regards,
>
> -onur
>
>
>
>
>
> ---
> Visit Nuvoiz.com for our SoftPhone Solutions!
> A. Onur Cinar - Istanbul Office Manager
> www.nuvoiz.com
>
>
>
> On 6/20/07, *amit* <amit.v at pyronetworks.com> wrote:
>
>
>
> Hi All,
>
> I would like to read the specific DTMF digit from the received RTP Event.
> At the moment I detect that there are DTMF tones (RemotePayloadChangeEvent
> -> Payload 101), but I have no idea to receive the "RFC 2833 RTP Event",
> that I see in my Ethereal Capture. If I have this Event I think I can
> extract the Event ID...
>
> I would be pleased to see some ideas or helpfull code fragments how to
> receive this RFC 2833 RTP Event.
>
> Thank you in advance.
> Amit
>
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-- 
Cheers,
Pradeep

Expect the UnExpected !!!
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