[asterisk-users] Accounting and re-invite

[Simon Woodhead]

Hi Ronald,

On 9/19/06, Ronald Wiplinger <ronald at elmit.com> wrote:
>
> I am thinking if re-invite will interfere accounting.


No it won't

Please help me to figure it out:
>
> Phone A is registered at asterisk and calls a gateway. If the gateway
> allows re-invite than the rtp would go directly from phone A to the
> gateway, while the sip messages are still going through Asterisk.
> Asterisk will be informed when the call ended.
> If it is a postpaid accounting, just bill the customer, however, how is
> it for a pre-paid (calling card user)?
> I think Asterisk will have no power to turn off the call from A to the
> gateway.
> Even more, if the gateway would allow to end a call and continue with a
> new call, the new call would not be billed (or would it)?


The SIP messages control the call, irrespective of where the RTP goes so
Asterisk can terminate/set-up calls exactly as if the RTP was being handled.


I guess the solution must be re-invite=no
> However, re-invite=no means that each call is going with rtp also
> through my server, what means for a remote phone, I have to provide for
> both legs the bandwidth.


Personally, I would always handle the RTP on
quality/accountability/consitency grounds but, yes, that will incur a
bandwidth overhead.
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