NOTE: The display indicates connected station or outside line at any given time.
CALL BACK (STATION)
Lift handset or press Speaker.
Dial desired station number and receive busy tone or ring back tone.
Press Call Back or dial 2 and receive service set tone.
Restore handset.
When busy station becomes idle or the station that did not answer initiates or answers a call
or accesses a feature and then becomes idle, the setting station is alerted by ring and
flashing LED.