RE: Regarding Static payload types defined using rtpmap

According to RFC 3551, the second way is preferred, but the first is also allowed.

Raphael Tryster

From: Nagar Prerna [mailto:prnagarcisco.com]
Sent: Tuesday, March 13, 2007 4:12 PM
To: megacoietf.org
Subject: [Megaco] Regarding Static payload types defined using rtpmap

Hi,

Query :  Can static payload types (0-95) be overloaded using "a=rtpmap:" ?

My understanding is , for this purpose we should define it using dynamic payload types.

Example:

m=audio 16474 RTP/AVP 18 0  96 97
a=rtpmap:18 G729a/4000
a=rtpmap:0 G.711u/8000
a=rtpmap:96 G726-40/8000
a=rtpmap:97 G726-24/8000

The above should be redefined as :

m=audio 16474 RTP/AVP 0  96 97 98
a=rtpmap:0 G.711u/8000
a=rtpmap:96 G726-40/8000
a=rtpmap:97 G726-24/8000

a=rtpmap:98 G729a/4000

Thanks and Regards,

Prerna