Yes, this is true. The actual codec in use is indicated through the RTP
payload type.
-Jonathan R.
---
Jonathan D. Rosenberg 72 Eagle Rock Ave.
Chief Scientist First Floor
dynamicsoft East Hanover, NJ 07936
[EMAIL PROTECTED] FAX: (973) 952-5050
http://www.cs.columbia.edu/~jdrosen PHONE: (973) 952-5000
http://www.dynamicsoft.com
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Friday, December 08, 2000 8:16 AM
> To: [EMAIL PROTECTED]
> Subject: Codec change between the codecs in agreed codec set
>
>
> Hi,
>
> According to SIP RFC and SDP RFC:
>
> When endpoint A sends its set of available codecs (1,2,3) in session
> description part (SDP) in INVITE to endpoint B and B sends its session
> decscription selecting the codecs, which B supports from the
> codecs in A's
> session description (for instance 1,2), the codecs 1,2 become
> the set agreed
> between the endpoints.
>
> It seems to me that if endpoint B wants to change from the
> default codec 1
> to codec 2 which belongs to the agreed set, there is no need
> to inform A
> about the codec change with re-INVITE. I would like to know
> if this is true
> or if there is implementations making re-Invitation in this kind of
> situation.
>
> Best Regards Tuula Korpela
>
