Hello!
Im trying to write custom extension dialplan that would play custom busy sound. Im wondering becuase by default it doesnt. 
So if for example im calling 01234567 and the called number is busy it has to send back to the extension that busy sound.
This is what i have for now:
;exten => _X.,1,Answer
;exten => _X.,n,Dial(${OUTBOUNDTRUNK}/${EXTEN:0}
;exten => _X.,n,Playtones(busy)
;exten => _X.,n,Playback(busy)
;exten => _X.,n,Busy(10)
;exten => _X.,n,Hangup
I really lack of experience in โcustomsโ so please be patient with me 
Thanks