Norstar DR5, Installer'S Manual

Page: 504 / 534

222 Glossary
DRT delay:
The number of
rings before a Delayed Ring
Transfer occurs. This is
assigned by your Customer
Service representative.
DRT to Prime: See
Delayed
Ring Transfer to Prime.
E
Emergency Telephone:
A
single-line telephone (also
referred to as a
telephone) that becomes active
when there is no power to the
Key Service Unit.
Event message:
An item stored
in the system log and displayed
during a Maintenance session.
Event messages record a
variety of events and activities
in the system.
Exceptions:
A component of a
Dialing filter. Exceptions are
numbers you can dial even if
they are forbidden by a more
general Restriction. See
Restrictions.
Expanded system:
A
system with an Expansion
Cartridge.
Expansion Cartridge: A
cartridge which connects Trunk
modules and Expansion
modules to the Key Service
Unit.
External call:
A call to a
destination outside the
system.
External Call Forward: See
Line Redirection.
External code:
The number
you dial to get an external line.
The default is 9, but this can be
changed by your Customer
Service representative. You do
not always need an external
code. It is primarily to support
the Telephone and
single-line telephones using an
Analog Terminal Adapter
External line: A
line on your
telephone used for
making calls to destinations
outside the system.
External music source: See
Music source.
External paging:
A feature you
can use to make voice
announcements over an
externally-mounted loudspeaker
connected to the Key Service
Unit. The external speaker is
not a component and
must be supplied by the
customer.
Extra-dial telephone: A
heading in Administration
programming that allows you to
assign an extra Direct-dial
telephone when a service mode
is active. You can have one
Extra-dial telephone for each of
the three service modes.
Modular System Coordinator Guide