=> call forwarding only

[kelompok1]
exten => 101,1,Dial(SIP/101,20)
exten => 101,2,Hangup
exten => 102,1,Dial(SIP/102,20)
exten => 102,2,Hangup
exten => 103,1,Dial(SIP/104,20)
exten => 103,2,Hangup
exten => 104,1,Dial(SIP/104,20)
exten => 104,2,Hangup 

=> call forwarding dengan kasus

[kelompok1]
exten => 101,1,Dial(SIP/101,20)
exten => 101,2,Hangup
exten => 102,1,Dial(SIP/102,20)
exten => 102,2,Hangup
exten => 103,1,Dial(SIP/103,20)
exten => 103,2,Dial(SIP/104,20)
exten => 103,3,Hangup
exten => 104,1,Dial(SIP/104,20)
exten => 104,2,Hangup