Hi all,
Is there a standard way (or some other way) to connect
two parties using SIP in the following way:
* Person A's phone rings
* A answers the phone, hears normal alerting tone
* B's phone starts to ring
* B picks up the phone and the call is connected
Must this be implemented using an RTP proxy that is
able to provide A with the alerting tone while B picks
up the phone, or was this service taken care of when
SIP was specified?
Additional question: can anyone help with choose of a
SIP stack and/or proxy server? Any experience is
appreciated.
Thanks for your help.
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