question about VoIP This topic has 1 reply, 1 voice, and was last updated 21 years, 9 months ago by Tom. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 31st March 2003 at 03:33 #24035 johnGuest each Voice channel for G.729 with 20ms samples will cost 24Kbps. that means it has to spend 48Kbps on two-way VoIP talking(G729). is it right? 31st March 2003 at 07:41 #24036 TomGuest No. You need 24kbps for full duplex. That is, 24kbps in each direction. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Voice over IP’ is closed to new topics and replies.