i have a callmanager with 2 H323 gateways all co located on one site. The codec in use for all call is G711. I am going to implement a 2 Mbps X21 leased line to a remote site with 10 cisco ip phones. I'm setting the phones in a new located and region within callmanger. I only want calls going across the wan link to be G729. I wondering if the h323 gateways will send calls across to the remote phones using g711? or do they negotiate the codec with the phone. I'm ok with the ip phone to phone connections as this is controlled by callmanager.