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Local Area Network
Liquid Crystal Display. A display panel found on many phones capable
of showing text prompts or messages
Least Cost Routing. A technique where the telephone system modifies the
digits dialled by a user making an outside call in order to route the
call via a low-cost carrier. Typically the routing decision is based
on what number has been dialled and it is often possible to have several
carriers configured on the same telephone system to take advantage
of the cheapest rout to any destination. See also Automatic Route Selection
(ARS). Typically ARS incorporates and builds on the capabilities of
Light Emitting Diode. A semi-conductor device used as an indicator lamp.
Typically these are incorporated into buttons and show red or green.
Live Call Screening
A facility available on some voicemail systems which allows someone who
has diverted his calls to voicemail to listen to a caller leaving a
message and pick up the call if he wants to.
Loud Ringing Bell
An audio warning device to alert someone that a call is ringing. It may
simply be an extension bell to a telephone or it could be a set of
bells around the building so that anyone can pick up the incoming call.
A reference to the location where voicemail messages for a particular
user are stored.
Message Application Progamming Interface - A messaging architecture and
a client interface component for applications such as e-mail, scheduling,
calendaring, and document management. As a messaging architecture,
MAPI provides a consistent interface for multiple applications programs
to interact with multiple messaging systems across a variety of hardware
Digital ISDN Dial-In number.
Multiplexers combine several data channels into one channel with bigger
bandwidth. The signal is split into the original channels at the other
end of the line.
Music on Hold
Most systems offer some sort of music which plays to callers while they
are holding for a busy extension. It aims to reassure the caller that
they are still connected, rather than lost in the system. Many systems
allow independent music sources such as tapes and CDs to be attatched
to the system. This is called 'user-defined music on hold'.
Most telephone systems have at least two operating modes, Day service
and Night Service. These are typically used to route incoming calls
to a different destination and to apply call barring to prevent unauthorised
use of the phones by security or cleaning staff.
Operator Consoles are the central answering points on PBX systems. They
give at-a-glance information about the stauts of lines and extensions.
They also give information about features which have been activated
and should show which calls are on hold and how long they have been
waiting. Some are low-level units attatched to a phone, usually with
some form of display. More sophisticated consoles come with a full-size
moitor display which provides system status information.