extension.conf
[globals]
[general]
autofallthrough=yes
[default]
[incoming_calls]
include => internal
[internal]
exten => 1001,1,Verbose(1|Extension 1001)
exten => 1001,n,Dial(SIP/1001,30)
exten => 1001,n,Hangup()
exten => 1002,1,Verbose(1|Extension 1002)
exten => 1002,n,Dial(SIP/1002,30 ...