Lucent Technologies 6.1 manual Opt, Opx, Pbx, Pft

MERLIN LEGENDCommunications System Release 6.1		Issue 1
System Planning 555-661-112		August 1998
Glossary
		Page GL-21
OPT	(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.
OPX	(off-premises extension)
out-of-band	Signaling that uses the same path as voice-frequency
signaling	transmission and in which the signaling is outside the band
	used for voice frequencies.

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	Set of software applications that provides an interface
Direct Connection	between a personal computer and an MLX telephone.
Solution
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	(Personal Computer Memory Card International
card	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	An extension that is not actually plugged into the system
extension	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	In a private network, a line/trunk that passes through the
facility	PSTN without using the switching capabilities of the PSTN.