Nortel ICS 7.1 Coordinator Manual page 258

258 / Glossary
directed pickup: See Call Pickup
Directed.
Directory number (DN): A unique
number that is automatically assigned to
each telephone or data terminal. The
DN, also referred to as an internal
number, is often used to identify a
telephone when settings are assigned
during programming.
Default DN assignments start at 221.
DISA DN: The received number
assigned to the Norstar direct inward
system access facility. If a caller dials a
number that is assigned to the
DISA DN, the caller hears stuttered dial
tone and must enter a Class of Service
password. Once the password is
accepted, the caller hears system dial
tone and can use Remote Access
features. See Remote Access.
Disconnect Supervision: A setting
that enables the Norstar system to detect
if an external caller hangs up. Once an
external caller hangs up, the Norstar
system can disconnect its line.
under data in
programming.
display: A liquid crystal display
(LCD) on the telephone that guides you
through feature operation and
programming.
display button: Two-line display
telephones are equipped with three
buttons located directly beneath the
display. During feature operation or
programming, some or all of these
buttons may be used to provide further
options. If an option is available, it is
shown in the bottom row of the two-row
display, directly above the
corresponding display button. Display
buttons are represented in this manual as
underlined capital, such as
DN: See Directory number.
Modular ICS 7.1 System Coordinator Guide
Do Not Disturb:
A feature that stops calls from ringing at
your telephone. Only Priority Calls will
ring at your telephone. A line button will
flash when you receive a call, but the
call will not ring
DTMF: See Dual tone multifrequency.
dual tone multifrequency: Two
distinct telephone signaling tones used
for dialing.
E
Emergency 911 dialing: The
capability to access a public emergency
response system by dialing the digits
9-1-1. State and local requirements for
support of Emergency 911 Dialing
service by Customer Premises
Equipment vary. Consult your local
telecommunications service provider
regarding compliance with applicable
laws and regulations.
emergency telephone: A single-line
telephone, also referred to as a 500/2500
telephone, that becomes active when
there is no power to the ICS.
is enabled
evening schedule: See Schedules,
and Services.
event message: Event messages are
stored in the system log and displayed
during a Maintenance session. They
record a variety of events and activities
in the Norstar system.
exceptions: See Overrides.
external call: A call to a destination
outside the Norstar system.
External Call Forward: See Line
Redirection.
external code: The number you dial
to get an external line. By default it is 9,
but this can be changed under
.
always need an external code. It is
primarily to support the 7000 and 7100
in . You do not
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