[SIPForum-discussion] (Rising Spam Alert) SIP-SIMPLE Subscribe to RLS and Presenceclarification

[Robert Sparks]

On Feb 14, 2007, at 1:12 AM, sukerry wrote:

> kamal mann，
>
> 1) yes
> 2) the following refreshing subscription messages are used to get  
> presence state infomation (such as online, offline, busy...) from B
Not really. The current presence state information will already be at  
A (by way of NOTIFYs, which get sent whenever B's presence changes
as long as the subscription is still active. The immediate NOTIFY  
sent after a refresh subscription does contain the full presence  
state, but that
was to simplify the protocol machinery, making refresh subscription  
processing look much like initial subscribe process. Many folks have  
noticed
that this causes unnecessary bandwidth to be used and have proposed  
protocol extensions to suppress the NOTIFY after a refresh subscribe.

> ======== 2007-02-14 14:12:28 you wrote： ========
>
> Hi All
> I have 2 queris in SIP-SIMPLE message flow
>
> 1):   When user A sends subscribe to presence for user B and User B  
> accepts it. Is User B added as a Buddy into user A's buddylist  
> (User A as a watcher to user B)?
> 2):   Why User A keeps refreshing subscription to User B even after  
> B's acceptance for it?
> Please give your valuable suggustions for the same.
>
> Thanks in anticipation
> Kamal Mann
>
>
> Here抯 a new way to find what you're looking for - Yahoo! Answers
> = = = = = = = = = = = = = = = = = = = = = =
>
>
> 　　　　　　　　　　　　　　sukerry
> 　　　　　　　　　　　　　　sukerry at 126.com
> 　　　　　　　　　　　　　　　2007-02-14
>
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