[Freeswitch-users] Is RFC 4733 supported ?

Michael Jerris mike at jerris.com
Thu Apr 23 08:04:27 PDT 2009

rfc 4733 attempts (and fails miserably) to clarify rfc2833.  It  
doesn't "really" change anything of any real substnace.  Our handling  
of these packets tries very hard to be strict in what we send and  
loose in what we accept and we tend to interoperate pretty well with  
most endpoints.  That being said, there are some very broken endpoints  
out there (such as sonus) that require special hacks, some are  
automatic, some require settings.  All that being said, we should be  
very compliant with both 2833 and 4733, although you will generally  
see references in settings refer to 2833.


On Apr 23, 2009, at 10:50 AM, Richard Lamkin wrote:

> I have looked on the wiki and only found passing reference to RFC  
> 4733 in the SRTP section.
> RFC4733 = RTP Payload for DTMF Digits, Telephony Tones, and  
> Telephony Signals.
> This obsoletes RFC2833.
> http://www.ietf.org/rfc/rfc4733.txt
> Richard Lamkin
> Mettoni Group UK
> richard.lamkin at mettoni.com
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