[SIPForum-discussion] querying capabilities using OPTIONS

[Mark R Lindsey]

In practice, many devices don't return much of anything useful. Most  
I've seen just return an empty 200 OK -- no payload, and only enough  
in the 200 OK to be legal. So you can't depend on much there.

A few devices will return SDP with no c= line, listing out all the  
available codecs.

I'd also be interested if anyone has any counterexamples.

mark r lindsey at e-c-group.com http://e-c-group.com/~lindsey +12293160013


On Sep 1, 2009, at 4:41 AM, Ayyanar PK wrote:

> Hi all,
>
> How is the capability of a UA is queried using options? I mean what  
> is sent in OPTIONS request and response 200OK.
>
> can some calrify please. If a network trace is available please  
> provide that.
>
> Regards,
> Ayyanar
>
>
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