;main context for incoming 
[incoming]
exten => 100,1,Dial(SIP/john)
exten => 100,n,Hangup

;this is not in use, but lots of stuff in asterisk wants it to be there, so create a dummy

exten => _.,1,Verbose(default context not in use)
exten => _.,n,Progress
exten => _.,n,Playtones(info)
exten => _.,n,Wait(10)
exten => _.,n,Hangup