[SIPForum-discussion] A method to send DTMF as RTP packets

[Hasini Gunasinghe]

Hi,
Thank you very much for all the replies. Actually I was looking for any
tool, a filter or an API to achieve the task of sending DTMF as stated in
RFC 2833. In other words, I used RTC Client API to implement the SIP  Stack
and used various directshow filters to implement the media stack. And these
days I am looking for a way to send DTMF from our soft phone.

And to Eric's question, RFC 2976 states how DTMF is sent as SIP INFO. That
functionality is provided with RTC Client API.

Thank you again.
regards,
Hasni.


On Sat, Feb 7, 2009 at 7:23 AM, Eric Burger <eburger at sipforum.org> wrote:

> RFC 4733 for RTP.
>
> How did you do SIP INFO? There is no published specification.
>
> Another option is RFC 4730, in NOTIFY.
>
>
> On Feb 5, 2009, at 9:33 PM, Hasini Gunasinghe wrote:
>
>  Hi,
>>
>> I am developing a SIP soft phone application in C++ for windows. There I
>> need to implement the functionality of sending DTMF. I implemented it using
>> SIP INFO method. I also need to implement sending DTMF as RTP packets. I was
>> searching for a method to do that but still did not find a solution. If any
>> of you know a way to achieve it (sucha as a filter which sends DTMF as RTP
>> data) please do reply. It would be a great help.
>>
>> Thank you.
>> regards,
>> Hasini.
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