Lucent Technologies MERLIN LEGEND 6 System Manager's Manual page 445

MERLIN LEGEND Communications System Release 6.0
System Manager's Guide 555-660-118
Glossary
peripheral system
personal line
PFT
phantom
extension
pool
point-to-point
facility
port
Power Failure
Transfer
power supply
module
PRI
primary system
operator position
prime line
private
communications
network or private
network
In a private network , a system that does not connect to
more than one other system, sometimes called an "end
node."
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.
In a private network, a line/trunk that passes through the
PSTN without using the switching capabilities of the PSTN.
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-channels for voice and/or data and one 16-
kbps D-channel , which carries multiplexed signaling
information for the other 23 channels.
First jack on the first MLX or analog multiline extension
module in the control unit, that is, the extension jack with
the lowest logical ID in the system.
Individual extension number assigned to a telephone in a
system operating in Behind Switch mode . Each telephone
user has his or her own prime line and is automatically
connected to that line when he or she lifts the handset.
An interconnected group of communications systems ,
which may consist of MERLIN LEGEND Communications
Systems, DEFINITY Enterprise Communications Servers
(ECS), and/or DEFINITY ProLogix Solutions.
Issue 1
February 1998
Page GL-21