Re: [Sip] FW: New Draft - Suppression of Refer Implicit Subscription

[Rohan Mahy <[e-mail]>]

Hi,

So you are just trading a pair of messages (NOTIFY/481) for an option  
tag in the REFER?  It doesn't seem that compelling to me personally.   
It certainly doesn't follow the generality over efficiency argument.   
Can you elaborate a bit more on your motivations?  The transfer draft  
recommends waiting for NOTIFY for attended transfer for robustness, so  
I'm not convinced there.  As for the "push content" model, I envisioned  
an immediate fetch, with a NOTIFY to deliver the status of that fetch.

thanks,
-rohan


On Monday, October 28, 2002, at 01:00 AM, Sriram Parameswar wrote:

> Hi All,
>
> I have submitted a draft (to SIPPING) that examines the requirements  
> and one
> _potential_ mechanism to suppress the implicit subscription created by  
> the
> REFER method.
>
> Till it appears in the IETF site - please pick up a copy at the site  
> below:
>
> http://home.attbi.com/~sriramkp/draft-parameswar-sipping-norefersub- 
> 00.txt
>
> <abstract>
>    The recipient of the REFER method [1] creates an implicit
>    subscription to the 'refer' event. This subscription causes the  
> REFER
>    recipient to send NOTIFY messages to the sender informing him of the
>    progress of the REFER. This memo provides for the requirements and
>    one potential mechanism to suppress the creation of this implicit
>    subscription, via an option tag - 'norefersub'. This gives the agent
>    sending the REFER control over the creation of the subscription,
>    while being backwards compatible with [1].
> </abstract>
>
> Your comments are highly appreciated.
>
> Regards,
>
> Sriram Parameswar
>
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