Bticino Terraneo Notice De Montage page 67

Call to an extension whose number is known
- if the number doesn't correspond to any name, the
following appears:
0006 : UNKOWN
OUTGOING CALL
Call's duration depends on the time
that
no other call will be possible, unless pressing
key C.
- it will anyway be possible to
send the call with
This allows the called
extension to remain
nameless
key is pressed. For the next 30 seconds
63
OPERATION
GB