Lucent Technologies MERLIN LEGEND Release 5.0 System Programming Manual page 927

MERLIN LEGEND Communications System Release 5.0
System Programming 555-650-111
Glossary
P
parity
PassageWay
Direct Connect
PBX
PC
PCMCIA memory
card
personal line
PFT
phantom
extension
pool
port
Power Failure
Transfer
power supply
module
PRI
The addition of a bit to a bit string so that the total number
of ones is odd or even, used to detect and correct
transmission errors.
Set of software applications that provides an interface
between a personal computer and an MLX telephone.
(private branch exchange) Local electronic telephone
switch that serves local stations (for example, extensions
within a business) and provides them with access to the
public network.
personal computer
(Personal Computer Memory Card International
Association memory card) See memory card .
Central office line/trunk that terminates directly at one or
more extensions. In Hybrid/PBX mode , a personal line
cannot be part of a line/trunk pool . Also called "DFT" (direct
facility termination).
(Power Failure Transfer) Feature that provides continuity
of telephone service during a commercial power failure by
switching some of the system's line/trunk connections to
telephones connected to specially designated extension
jacks.
An extension that is not actually plugged into the system
but is used, for example, as a calling group member
covered by a voice messaging system .
In Hybrid/PBX mode , a group of outside lines/trunks that
users can access with a Pool button or by dialing an
access code on an SA button . Also used by the ARS
feature when choosing the least expensive route for a call.
See jack . Also, refers to extension or line/trunk jacks before
these are numbered according to the dial plan during
programming. The lowest jack on a module is always
Port 1.
See PFT .
Device that directs electricity to modules and telephones on
the system. One power supply module is needed for each
carrier, and an auxiliary power unit is added if needed.
(Primary Rate Interface) Standard interface that specifies
the protocol used between two or more communications
systems. As used in North America, it provides
twenty-three 64-kbps B-channel s for voice and/or data and
one 16-kbps D-channel , which carries multiplexed signaling
information for the other 23 channels.
Issue 1
June 1997
Page GL--14