I have one problem in Asterisk.
I have created one SIP extension using FreePBX.
I am using Xlite Soft phone.
My Asterisk server is on another nework and Xlite phone is on another network.
I am using username 2001 and password 2001 and my asterisk server domain in my Xlite Phone configuration.
But I am not able to register it. I am getting Call Fail : Service Unavailable.