t.silva Thu, 06/28/2007 - 08:46
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H.245 is a protocol utilized for media negotiation in H.323 world. H.245 tunneling is a technique to use the same SETUP session (TCP:1720|TCP:1721) to transport the protocol. This is useful for overcoming firewall restriction and in order to speed up call establishment .

Without this functionality an endpoint must use another TCP session (with a dynamic port) for that function.

Best regards

ciscoforum Tue, 07/10/2007 - 11:59
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Is that something to do with H323 fast start and slow start? I remember H323 fast start does not need H245 to setup another tcp port.


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