Sistema simple de Disa y call foward

[paul]

exten=>_13052365874,1,Set(CALLERID(num)=${CALLERID(num)})
exten=>_13052365874,2,Dial(SIP/paul/18097143489,25,o)
same=>n,Hangup()

exten=>_12365478547,1,Answer()
same=>n,Authenticate(1212)
same=>n,Disa(no-password,disa)

[disa]
exten=>_x.,1,Dial(SIP/${EXTEN}@paul,25)
same=>n,hangup()