[Freeswitch-users] domain instead of ip address on placed call...

Hello Guys, Have an issue with calls. I am testing this different devices (nokia n900, nokia e60, nokia n810, ekiga, sipura spa3000) and have similar results between them. When I place a call from a device registered as 1001@host.com to 1002@host.com, it will show up at the other end (1002) as 1001@12.34.56.78 Can the IP address be replaced by the domain FQDN of the callers domain/acount? greets, Gerard