----extension.conf----
[internal]
...
include => PICKUP
include => HINTS
exten => 100,1,Dial(SIP/secretaire)
exten => 200,1,Dial(SIP/patron)
exten => 300,1,Dial(SIP/technicien)
[HINTS]
exten => 100,hint,SIP/secretaire
exten => 200,hint,SIP/patron
exten => 300,hint,SIP/technicien
[PICKUP]
exten => _**.,1,Set(CALLERID(all)=PICKUP <${CALLERID(num)}>)
exten => _**.,n,NoOp(CALLERID=${CALLERID(all)})
exten => _**.,n,Pickup(${EXTEN:3})
exten => _**.,n,NoOp(CALLERID=${CALLERID(all)})
----aastra.cfg----
directed call pickup: 1
directed call pickup prefix: **