AT&T Definity ISDN 7507 - Manual (Page 9)

What the Features Do
Here are brief descriptions of 23 voice features, including what each one does and how
you might want to use it. You will have the Conference, Drop, Hold, Message, Mute,
Redial, Select Ring, Self-Test, and Transfer features. In addition, you may have many of
the other features listed here; your System Manager can advise you.
Abbreviated Dialing Allows you to store selected telephone numbers as 3 digits or
less for quick and easy dialing. Each number can be a complete or partial telephone
number, an extension number, or a trunk or feature code. There are 3 possible types of
lists—personal, group, and system —and you can have a total of 3 lists. Numbers on a
personal list are programmable by you; numbers on all other lists are programmable
only by the System Manager. Use as a timesaver for dialing frequently called, lengthy,
or emergency numbers. Note: Check with your System Manager concerning what
types of lists you have and how many of each.
Automatic Callback Sends you a special 3-burst ring tone indicating that a
previously busy extension is now available. Use to avoid constant redialing when you
wish to speak to someone who is frequently busy on the telephone. Note: Can be
used only for extensions, not outside numbers.