If someone dials 999 from an extension this will hangup calls to get an outside line
;[emergency]
;checks to see if theres an outbound zapata channel availbe
exten => 999,1,ChanIsAvail(Zap/1)
;if there is, dial 999
exten => 999,2,Dial(${AVAILCHAN}/999)
;then hangup when finished
exten => 999,3,Hangup()
;or….. just hang up the call
exten => 999,102,SoftHangup(Zap/1-1)
;wait a second
exten => 999,103,Wait(1)
;start again
exten => 999,104,Goto(1)
