h245 tunneling

Unanswered Question
Jun 28th, 2007

what is h245 tunneling and what is it for? Thanks

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
t.silva Thu, 06/28/2007 - 08:46

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

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.

Actions

This Discussion