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Billing in VoIP

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rgupta
Billing in VoIP

In SIP when UAS sends 200 OK to UAC,then both are knowing the opposite party address. ACK & BYE will go directly ,bypassing the proxy.How the proxy will come to know in this case that BYE has been sent and it has to stop the billing. ???

Edited by: admin on 05/16/2010 - 04:32
Robert
Re: Billing in VoIP

Every SIP signalling messages are exchanged by means of SIP proxy server not directly. If you will capture some SIP signalling scenario, you can see that in SIP there are CONTACT and VIA headers, there are real IP addresses, in headers FROM and TO there are your proxy server IP.

rgupta
Re: Billing in VoIP

Thanks for the answer Robert.
I am still confused a bit.Can you plz ecxpalin it with the help of  asimple example.Something like with two SIP parties and a proxy in between them.