Hi I working in one of the voip company. I set the caller id in sip.conf and it works fine if user call to cell phone but when user call to AT&T customers calle id does not work and it says “out of area”. Any idea. Following is the setting of user in sip.conf.
nat=yes ; X-Lite is behind a NAT router
canreinvite=no ; Typically set to NO if behind NAT