[Freeswitch-users] Force G729 codec for E1 connection

Hi, I just finished a freeswitch server that act as E1 gateway for PBX system. I noticed that all the call from the gateway use PCMU codec before transcoded to G729 in my main SIP server. My current situation is as following : [PBX] --- E1 ---> [Gateway] --- SIP/PCMU ---> [SIP Server] --- G729 ---> [ITSP] What I intended to do is as following : [PBX] --- E1 ---> [Gateway] --- SIP/G729 ---> [SIP Server] --- G729 ---> [ITSP] Is there anyway to send the media from E1 gateway as G729 instead of PCMU? I need to preserve bandwidth for future expansion. Regards, William