Oki 1.2 - Manual (Page 20)

12
Absent service
If the absent service is registered, an incoming call is transferred to a
registered destination. The transferred call will not be transferred any
further.
To use this service, Use PSTN line must be turned off.
How to register the absent service
Pick up the handset, dial “***11” and the
“destination number to be transferred” and
hang up the handset. When the service is set,
the LINE-LED lamp will blink.
How to cancel the absent service
Pick up the handset, dial “***12,” and hang up
the handset. When the service is cancelled, the
LINE-LED lamp will go off.
Placing Calls