sip & h323 This topic has 1 reply, 1 voice, and was last updated 20 years, 11 months ago by Jim. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 6th January 2004 at 19:29 #26061 micnacGuest whats the difference between a sip gateway and an h323 gateway? 6th January 2004 at 20:14 #26062 JimGuest They are different protocols. Go to Google and do a search for SIP versus H323 and you will come up with sites that do a comparison for you. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Voice over IP’ is closed to new topics and replies.