Lucent Technologies MERLIN LEGEND Release 7.0 System Planning Manual page 450

MERLIN LEGEND Communications System Release 7.0
System Planning 555-670-112
Glossary
Port
Power Failure
Transfer
Power Supply
Module
PRI
Primary System
Operator Position
Prime Line
Priority Call
Queuing
Private
Communications
Network
Private Network
Private Network
Trunks
Processor Module
Programming Port
Reassignment
Protocol
PSTN
Jack . Also, refers to extension or line/trunk jacks
See
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.
System function that prioritizes calling groups, thereby
allowing certain incoming calls to be answered before
others. Available in Release 7.0 and later systems.
See Private Network
Interconnected group of communications systems , which
may consist of MERLIN LEGEND Communications
Systems, DEFINITY Enterprise Communications Servers
(ECS), and/or DEFINITY ProLogix Solutions.
Facilities that connect communications systems in a private
network . See also Tandem Tie Trunk
Trunk .
Module in the second slot of the control unit (Slot 0, to the
right of the power supply module ). Includes the software
and memory that runs the system.
Reassignment of the system programming jack position to
any of the first five extension jacks on the first MLX module
in the control unit.
Set of conventions governing the format and timing of
message exchanges between devices, such as an MLX
telephone and the control unit.
Public Switched Telephone Network . Network that is
commonly accessible for local or long-distance calling. Also
called "public network" or "public switched network."
.
and
Issue 1
April 1999
GL-22
Tandem PRI