Siemens Hicom 300 Operator's Manual page 4

Conference - Not used on current software.
Memory Access - Used to access and programme various features
e.g. repertory dial keys and to select per-programmed night service.
Also select language of choice.
Memory Input - Used to store above programming and selections.
Override - For breaking into calls when dialled extensions are busy.
Override tone warns the extension of break-in.
Saved Number - For storing and later redialling of a selected
number. The number can be stored for a long as required.
Trunk Queuing - Used to book an outgoing line if all lines are busy.
Attendant Release - For the through connection of an incoming call
and an extension who are connected to the console but not con-
nected to each other.
Delete - Used to delete an incorrectly dialled extension number or
outgoing number.
Hold while Extending - Used if you wish to announce an incoming
call to an extension.
Light Emitting Diodes (LED,s) above keys
LED Off
LED Fast flash
LED Slow flash Call held until key is depressed again
LED Constant
4
Volume/Display - Volume control for ringing or depress
both keys to invert display (black on white or white on black).
No calls waiting (key free/available)
Call waiting (depress key to answer)
Call answered or feature activated