[SIPForum-discussion] DTMF -

[abhishek.chattopadhyay at wipro.com]

Hi,

 

Any codec less than or equal to 95 are well known (standard codec) and
anything above 95 are dynamic codec.

Every sip entity which wishes to use these codec (above 95) need to
specify the specific event that it wants to associate with that.

So with any codec above 95 (dynamic codec) an attribute should be
present which can educate the far end about the event the offerer wishes
to attach with that codec.

 

So the answer is both are correct as far as both are mapped to the rtp
event.

 

 

Example :

 

Content-Type: application/sdp

Content-Length: 177

v=0

o=user1 0 0 IN IP4 164.164.8.93

s=-

IN IP4 164.164.8.93

t=0 0

m=audio 6000 RTP/AVP 0 8 18 96

a=ptime:20

a=rtpmap:96 telephone-event/8000

a=fmtp:96 0-15

a=sendrecv

 

 

Regards 
ABHISHEK 

 

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Sandra Aparecida
Santos Amaral
Sent: Thursday, June 04, 2009 3:14 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] DTMF -

 


Hi, 


What is correct sending in SIP - DTMF 
m=audio 12344 RTP/AVP 99 

or 

m= audio 1236 RTP/AVP 101 



Atenciosamente, / Saludos,

Sandra Aparecida Santos do Amaral

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20090604/4832640a/attachment-0002.html>