AT&T 7406BIS - Manual (Page 67)

feature code A dial code of 1, 2, or 3 digits (4 digits in System 85 R2V4), that you use
to activate or cancel the operation of a feature.
group list One of the 3 types of Abbreviated Dialing lists; programmable by the
System Manager or a controller of the list. Contains telephone numbers useful to
members of a specific group, and stored as 1- or 2-digit list items, depending on the
number of members in the list.
handset The hand-held part of the voice terminal that you pick up, talk into, and
listen from. Also known as the receiver.
message retriever A person authorized by the System Manager to retrieve messages
for other users (coverage message retriever).
off-hook When the handset is removed from the cradle (for example, when you lift
the handset to place or answer a call) or speakerphone is ON.
on-hook When the handset is left on the cradle or speakerphone is OFF.
party A person who places or answers a call.
personal list One of the 3 types of Abbreviated Dialing lists; programmable by the
System Manager or by you, the user. Contains telephone numbers of your choice, and
stores each of them as a 1- or 2-digit list item, depending on the number of members
in the list.