Nortel Networks 2002 - Manual (Page 143)

Terms you should know
143
Primary directory number
The main extension number on your telephone.
Private Line
A feature that can be assigned to your telephone. With this line,
you can reach an outside number without dialing a code to
access an outside line. Internal extensions cannot be dialed from
a private line.
Programmable line (DN) and feature keys
The four keys located at the sides of the upper area of the
display.
Quit key
A fixed key on your telephone that is used to exit applications.
Redial List
A list of previously dialed telephone numbers (maximum 20
entries).
Ringback/ring tone
A sound indicating that a call you have made is ringing at its
destination.
Secondary directory number
A second incoming/outgoing line for your telephone.
Services key
A fixed key used to access options such as Telephone Options,
Password Admin, Display Network Diagnostics Utilities, Virtual
Office Login, Virtual Office Logout, Test Local Mode, and
Resume Normal Mode.
Shared directory number
A DN (extension) that is shared by two or more persons.