Re: draft-ietf-mmusic-sip-session-timer-00.txt

[Jonathan Rosenberg <[e-mail]>]

Vipin Palawat wrote:
> 
> Hello Francois,
> 
> I can tell you how H.323 gatekeeper keeps track of Call duration .
> 
> There is one IRR message which keeps on coming from the endpoint which
> actually says that 'I am alive '. The frequency of this IRR message is also
> decided by gatekeeper in ACF message.
> Now if gatekeeper does not get this IRR message within the specified time
> then he can also request for status of endpoint by sending IRQ message for
> which if he does'nt get IRR then he can assume the endpoint to be dead and
> note down the time. Thus he can very well bill the endpoint based on time.In
> this case he don't have to bother about reregistration of endpoint .

So, if I'm writing H.323 client software, and I simply don't send IRR or
respond to IRQ, the gatekeeper thinks I'm down, the billing stops, and I
get cheap phone calls?

> 
> For packet based billing he can route the RTCP packets (which are of course
> not the media stream) to get the information regarding RTP packets.

RTCP packets are sent along with media packets (same address, one port
higher), and are end to end. Are you saying that they get rerouted to
gatekeepers?

-Jonathan R.


-- 
Jonathan D. Rosenberg                       Lucent Technologies
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