Lucent Technologies MERLIN LEGEND Release 5.0 System Planning Manual page 372

MERLIN LEGEND Communications System Release 5.0
System Planning 555-650-112
Glossary
O
off-hook
off-premises
telephone
on-hook
OPT
OPX
P
parity
PassageWay
Direct Connect
PBX
PC
PCMCIA memory
card
personal line
PFT
phantom
extension
Telephone is said to be off-hook when the user has lifted
the handset, pressed the Speakerphone button to turn on
the speakerphone, or used a headset to connect to the
communications system or the telephone network.
See OPT .
Telephone is said to be on-hook when the handset is hung
up, the speakerphone is turned off, and the user is not
using a headset to connect to the communications system
or the telephone network.
(off-premises telephone) Single-line telephone or other
tip/ring device connected to the system via a 008 OPT
module in the control unit. Appears as an inside extension
to the system, but may be physically located away from the
system.
(off-premises extension)
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 .
Issue 1
June 1997
Page GL--14