exten => 2030,1,Set(DYNAMIC_FEATURES=automon) ; enable One-touch
exten => 2030,n,Set(CALLERID(number)=8001111111)
exten => 2030,n,Dial(SIP/18651111111@junction,,twW)

exten => _NXXNXXXXXX,1,Set(DYNAMIC_FEATURES=automon) ; enable One-touch
exten => _NXXNXXXXXX,n,Set(CALLERID(number)=8001111111)
exten => _NXXNXXXXXX,n,Dial(SIP/1${EXTEN}@junction,,twW)
exten => _NXXNXXXXXX,n,GotoIf($[${DIALSTATUS} = "BUSY"]?100)
exten => _NXXNXXXXXX,n,Congestion
exten => _NXXNXXXXXX,100,Busy