Hi,

How can a UA publish its capabilities of supporting multiple packetization 
time support for a particular codec,

For example:
For codec L8 if it supports both 20 and 30 ms ptime values,
For codec L16, it supports 40 ms

Is following media line is allowed?

m=audio 49230 RTP/AVP 96 97
a=rtpmap:96 L8/8000
a=ptime: 20
a=ptime:30
a=rtpmap:97 L16/8000
a=ptime:40

And is ptime attribute a property of whole media lines or only for a 
codec, I remember in earlier discussions it is a codec attribute.

-Udit

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