[Freeswitch-users] False Answer Supervision (FAS) - Question

[Michael Collins]

2010/4/12 Alfredo Quiroga-Villamil <lawwton at gmail.com>

> Thanks for the response Vlasis. We run statistical analysis for FAS in
> our production routes.
>
> This request would be for a controlled environment where I am using
> GrandStreams 488 to convert from Voip to PSTN. I was thinking that
> perhaps FS has a way to allow me somehow access to the Signaling
> portion of the protocol. If that was the case, I would be able to hack
> my way around it and perhaps ignore the first 200 I receive and not
> propagate it to the origination gateway. This is the setup I am
> looking at:
>
> A => B => GrandStream Device => PSTN
>
>   SIP   SIP
>
> A/B - Both Gateways
>
> This is a test environment I am using, something I am just playing
> with. So in every case I will receive a FAS from the GrandStream
> device.
>
> Do you know if there is a way to launch an application from the
> DialPlan and have access to intercept Signaling; something that would
> allow me to see the messages coming in and make decisions based on
> them like propagate or do not propagate that message. I know this is a
> tough thing since I am literally asking for access to the SIP Stack.
>

I think those last two sentences describe a natural feature of a SIP proxy.
I'd check out OpenSIPS to see if it has the stack-level control and
functionality that you need.
-MC
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