On 02/21/2012 07:51 AM, Alex Balashov wrote:
As many ports as required by the nature of the call, i.e. the protocol(s) used for the bearer.
For an IAX2 call, the answer is 'zero' for all of those call types (at least the ones that are supported in IAX2, not all of them are).
For protocols that use RTP for media transport, two ports are required for each media stream (one for RTP, one for RTCP).
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