[SIPForum-discussion] RFC 3655 question for Record-Route?

[Robert Sparks]

No - Record-Route is exactly about routing future SIP messages in a  
Dialog.

It has nothing _directly_ to do with billing. What Tam was trying to  
say was that being part of a billing system might be one reason a  
proxy might choose to record-route or not.

Whether or not to record-route is based simply on whether the proxy  
wants to remain in the path of other requests in any dialog _this  
particular request_ might create.

RjS

On Sep 3, 2008, at 6:16 AM, kunal lodha wrote:

> Hello,
>
> So record-route is just inserted for billing purpose. Is that header  
> not necessary for the proxy to know about the source/destination for  
> routing SIP messages?
>
> Thanks for your response,
> KL
>
> --- On Wed, 3/9/08, Nguyen Ngoc Tam <ngntam at gmail.com> wrote:
> From: Nguyen Ngoc Tam <ngntam at gmail.com>
> Subject: Re: [SIPForum-discussion] RFC 3655 question for Record-Route?
> To: kuns_lodha at yahoo.co.in
> Date: Wednesday, 3 September, 2008, 1:40 PM
>
> Hi,
>
> The SIP proxy just routes the SIP messages, so when the SIP proxy  
> receives a message, depending on its role, it can decide if it wants  
> to insert the record-route to header field. If it inserts the record- 
> route,  the following SIP messages will be passed through it.
> In this case, may be the Proxy2 is not used for billing, so it don't  
> care about the BYE message. Thus it does not insert record-route here.
>
> Tam
>
>
> On 9/2/08, kunal lodha <kuns_lodha at yahoo.co.in> wrote:
>
> Hello,
>
> RFC 3665, last line of page 45 mentions that
>
> (Also note that Proxy 2 does not Record-Route in this call flow.)
>
>
> I am not following why the Proxy2 doesnot Record-Route here.
> Also, how BOB reaches to the Proxy if RR is not included in the  
> INVITE?
>
> Thanks,
>
> KL
>
>
> Unlimited freedom, unlimited storage. Get it now
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