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MERLIN LEGEND Communications System Release 6.1
Network Reference
555-661-150
Issue 1
August 1998
Glossary
Page GL-21
P
out-of-band
signaling
Signaling that uses the same path as voice-frequency
transmission and in which the signaling is outside the band
used for voice frequencies.
parity 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.
PassageWay
Direct Connection
Solution
Set of software applications that provides an interface
between a personal computer and an MLX telephone.
PBX (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.
PC personal computer
PCMCIA memory
card
(Personal Computer Memory Card International
Association memory card) See
memory card
.
peripheral system In a
private network
, a system that does not connect to
more than one other system, sometimes called an “end
node.”
personal line 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).
PFT (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.
phantom
extension
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
.
pool 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.
point-to-point
facility
In a
private network,
a line/trunk that passes through the
PSTN
without using the switching capabilities of the PSTN.
port 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.
Power Failure
Transfer
See
PFT
.