118 / Glossary
Modular ICS 5.0 Companion Installer Guide
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destination code: A two- to seven-
digit number that the system
interprets and then translates into
the digits that you want dialed out.
Both the code and its associated
dialed digits are assigned under
Routing service in Services
programming.
Directed Receive Signal Strength
Indicator: A measurement of the
signal strength between a portable
and a specific base station radio.
You require the 5-digit ID of the base
station radio that you want to
measure.
See also Receive Signal Strength
Indicator.
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.
DN: See Directory number.
E
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.
Expansion Cartridge: A cartridge
that allows you to connect Trunk
Modules and Station Modules to the
ICS to expand the system’s capacity
for trunks and telephones. There are
two Expansion Cartridges: a two-
port Expansion Cartridge and a six-
port Expansion Cartridge. (See also
Combo Cartridge.)
External paging: A feature you can
use to make voice announcements
over an externally-mounted
loudspeaker connected to the
Integrated Communication System.
The external speaker is not a
Norstar component and must be
supplied by the customer.
H
Handoff: An activity of Companion
wireless components. Handoff is
when the system “finds” a new cell to
maintain the link between a portable
telephone and the ICS.
I
ICS (integrated communication
system): The central hardware
component in the Norstar system.
The ICS has its own processor and
memory, and provides a physical
point of connection for the various
types of devices, telephones, and
expansion modules used in Norstar.
The ICS can function on its own as a
basic system (with 32 Norstar
telephones and up to 48 external
lines), or with the addition of Trunk
