>> feature.conf
[general]
parkext => 700
parkpos => 701-720
context => parkedcalls
parkingtime => 45 
courtesytone = beep  
findslot => next
transferdigittimeout => 3
xfersound = beep         
xferfailsound = beeperr 
pickupexten = *8        
featuredigittimeout = 500
[featuremap]
blindxfer => *1 
disconnect => *0
automon => *3 
atxfer => *2  

>> extensions.conf
[to.office]
exten => 299,1,Dial(SIP/205&SIP/206&SIP/212&SIP/217)
exten => 299,n,Congestion
exten => _2XX,1,Dial(SIP/${EXTEN},60,tT)
exten => _2XX,n,Congestion
exten => *8,1,PickUp()