Andrew Kohlsmith wrote:
RTP has 12 octets all its own, and still need 12 bytes of IP overhead, so it is actually costlier: I'll spare you all the calculations but it's 20 channels of SIP G.711 audio per T1, likely with enough room for signalling. :-)
And you can't run straight IP over a T1 circuit either; it's usually framed in HDLC frames. There's a little more overhead for you <G>
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