Hi Tibor
Recording works by collecting the RTP packets from the call - these contain the streamed audio.
Typically ringing is generated by the endpoint (i.e. the IP phone, as a result of a skinny message that says 'generate ringback') or other device (i.e. signalled to the PSTN over the PRI, and generated for the far end party by whatever they have - voltage on a POTS line, other IP Phone etc).
So there typically isn't ringback to record.
Aaron
Aaron
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