AT&T MERLIN LEGEND Release 3.1, Руководство по системному программированию

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Glossary
GL–20
System Programming
P
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
Solution Set of four software applications to provide an interface
between a personal computer and the system: cardfile,
telephone programming application, call log and viewer,
and applications manager.
pass-through Connection from an internal modem to a programming jack
on the system.
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 .
personal line Central office trunk that terminates directly on one or more
telephones. In
Hybrid/PBX mode , a personal line cannot be
part of a 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 trunk connections to
telephones connected to specially designated extension
jacks.
pool In Hybrid/PBX mode , a group of outside trunks that users
can access with a Pool 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.
port See
jack
. Also, refers to
extension
or
line 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
.