If you are facing one way audio issue with freeswitch for all outgoing calls via mobilink infinity trunk , all you need to do is to edit conf/vars.xml and set EXT_SIP_IP & EXT_RTP_IP to 192.168.100.1 . That’s it , your
Howto register your Mobilink Infinity VoIP number on Softphone
Here are the SIP settings , if you want to use your VoIP number from Mobilink Infinity on a softphone. You’ll have to first logon to your CPE admin interface , Browse to NAT -> ALG and Uncheck “SIP ALG”