[line_one_incoming]
include => parkedcalls

;Answer and forward to line one
exten => s,1,Answer()
exten => s,2,Dial(SIP/2020)

;to send caller to voicemail dial extension star one
exten => _XX*1,1,VoiceMail(${EXTEN:0:2})
exten => _XX*1,2,Playback(/var/lib/asterisk/sounds/goodbye)
exten => _XX*1,3,Hangup()

;to put caller on hold dial *25
exten => *25,1,Park(701)

;to pickup a parked call dial *50
exten => *50,1,ParkedCall(701)