Re: [Sip] [Sip-implementors] 200 OK response for hold with different media capabilities

[Paul Kyzivat <pkyzivat at cisco.com>]

Avasarala Ranjit-A20990 wrote:
> no it should not. For a Hold request, you do not send any media
> capabilities. U only change the existing media description lines to
> indicate HOLD.

I beg to differ.

Technically there is no HOLD request.
All there is is an offer that offers to change a media attribute, from 
sendrecv to sendonly or inactive, or from sendonly or recvonly to inactive.

The response may change anything that is permitted to be changed in the 
answer, given the offer. So it may not add m-lines, but it can certainly 
change media addresses, and within limits may change media formats (codecs).

	Thanks,
	Paul

> Regards 
> Ranjit 
>
>  
>
> ________________________________
>
> From: sip-bounces at ietf.org [mailto:sip-bounces at ietf.org] On Behalf Of
> sunil.bhagat at wipro.com
> Sent: Monday, August 24, 2009 3:25 PM
> To: sip at ietf.org; sip-implementors at lists.cs.columbia.edu;
> sip at core3.amsl.com
> Subject: [Sip] 200 OK response for hold with different media
> capabilities
>
>
>
> Hi All,
>
>  
>
> I have a small query related to HOLD request being sent out.
>
>  
>
> For a hold request, can gateway respond with different media
> capabilities in 200 OK response?
>
>  
>
> Is the HOLD treated as any normal Re-INVITE?
>
>  
>
> Regards,
>
> Sunil.
>
>  
>
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