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h245 tunneling

what is h245 tunneling and what is it for? Thanks

2 REPLIES
Community Member

Re: h245 tunneling

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

Community Member

Re: h245 tunneling

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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