Subject: RE: [SIP] Question of Session timer document

From: Steve Donovan <[email-masked]>
Date: Mon, 21 May 2001 11:58:34 -0400

>  -----Original Message-----
> From: 	jinho Hwang [mailto:[email-masked]] 
> Sent:	Sunday, May 20, 2001 9:36 PM
> To:	[email-masked]
> Subject:	[SIP] Question of  Session timer document
> 
> 1.In this figure
> 
>  << OLE Object: PBrush >> 
> if 11th BYE is sent by UAC and SPS does not receive the BYE message,
>   How is the fee computation of Calling UA ? and a point in time of the
fee computation ?

What fee?  What is being charged for?  If it is some sort of a per minute
charge for the SIP session, then this diagram is a perfect illustration of
why it is not a good idea to base billing on SIP messaging.

> 
> 2. In this figure
>  << OLE Object: Visio 2000 Drawing >> 
> 
> 
> in Called UA which is received INVITE message,
> How decides UAS whether this INVITE  is first INVITE or is second, 3th...
INVITE?

Using the call identification parameters (To, From, Callid).

> As 400 rejected Media message is sent by UAS, UAS must know the state of
INVITE message's counts.....
> 
> 
> What do you think about 2 problem?...
> 
> 
> 

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