[OpenSIPS-Users] rtp and fake hangup

Bogdan-Andrei Iancu bogdan at voice-system.ro
Thu Jan 6 18:24:54 CET 2011

Hi Mike,

it is not the only one. You can detect such ghost calls also at 
signalling level (via SST).

But detection at media level:
    - is the most accurate as time error
    - it adds the biggest load on the system (as you need to put all RTP 
streams on your servers).

So, which one to use (signalling versus media), is about making a 
compromise between accuracy and load (considering that such ghost calls 
are corner cases).


mancyborg at gmail.com wrote:
> Hi All,
> in a scenario where opensips routes calls from sip user agents to voip carriers:
> can you please confirm that the only way to be sure to prevent fraud false hangups
> is to force the voice (rtp) to pass through opensips ?
> Thanks and regards,
> Mike
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> Users at lists.opensips.org
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Bogdan-Andrei Iancu
OpenSIPS Event - expo, conf, social, bootcamp
2 - 4 February 2011, ITExpo, Miami,  USA

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