call relay problem This topic has 1 reply, 1 voice, and was last updated 15 years, 2 months ago by gyhew. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 12th September 2007 at 16:55 #31537 driss benattouGuest hello, following a model installed, there were a Cisco Call Manager 4.1 connected to Call Relay SP that connected to an operator who is PSN. the codec fixed by the operator is G729. the problem is that once the calls pass, in one side you hears in other side you hear anything. how can i resolve the problem. i wait for your feedback 13th September 2007 at 08:23 #31538 gyhewGuest are you refering to one way audio? is there any firewall installed in between? do you have NAT? Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Voice over IP’ is closed to new topics and replies.