Lucent Technologies MERLIN LEGEND Release 5.0 System Planning Manual page 373

MERLIN LEGEND Communications System Release 5.0
System Planning 555-650-112
Glossary
pool
port
Power Failure
Transfer
power supply
module
PRI
primary system
operator position
prime line
processor module
programming port
reassignment
protocol
public network
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.
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-channel s 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.
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.
Network that is commonly accessible for local or
long-distance calling. Also called "public switched
telephone network" or "public switched network."
Issue 1
June 1997
Page GL--15