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Glossary
Hung line:
A line that remains
busy after a redirected call is
over. A hung line is indicated
when a line indicator is solid for
a long time and a call is not in
progress. Hung lines can be
cleared at the telephone that
was used to redirect the line.
I
An abbreviation of Intercom
button.
Intercom button:
A button that
provides access to internal lines
used for calls within a
system and access to external
lines through a Line Pool or
external code. A telephone may
be assigned zero, one or two
Intercom buttons. This is done
by the Customer Service
representative.
Intercom keys:
See Intercom
button.
Internal line:
A line on your
telephone dedicated to making
calls to destinations inside your
system. An internal line
may still connect you with an
external caller if you use it to
access a line pool or to pick up
a call using
call
handling features such as Call
Park or Call Pickup Directed.
Internal number:
A number
(also referred to as a Directory
Number or DN) that identifies a
telephone or device.
Internal user:
A person using a
telephone within a
system.
K
Key Service Unit (KSU):
The
central hardware component in
the system. The KSU
has its own processor and
memory, and provides a
physical point of connection for
the various types of devices and
telephones used in
The
KSU supports 8
telephones and 3 external lines.
L
Line:
The complete path of a
voice or data connection
between one telephone (or
other device) and another.
Line abilities:
The heading in
Administration programming
under which you assign Line
filters to lines.
Line filter:
See Dialing filter.
Line names:
The sub-heading
in Administration programming
that allows you to assign names
to external lines.
Line number:
A 2-digit number
that identifies an external line.
Three external lines are
supported by the KSU.
Owner’s Handbook
PO84262701