Paradyne COMSPHERE
3610 User Manual page 101

link-level address NMS communications are directed to a tributary via a link-level address. It takes the form of control
network address/tributary network address (e.g., 157/04 — DSU control address of 157 and tributary
address of 04).
LN Load Number. Percentage of total load to be connected to a telephone loop used by the labeled
equipment.
loopback test Any test that verifies a device's integrity by connecting the device's output in one direction to the device's
input in the other direction and then checking the received signal for errors.
LPDA Link Problem Determination Aid. A series of testing procedures used in NetView that are initiated by the
network control program (NCP) that provides the status of modems and attached devices, and the overall
quality of the link.
LSD Line Signal Detect. A signal between the DTE and the device indicating energy exists on the transmission
circuit.
MCMP Multichannel Multipoint. A circuit card that enables the support of up to six independent applications
over a single multipoint digital facility. The MCMP capability can support up to 40 tributary DSUs, each
optioned with an MCMP card.
MNP Microcom Networking Protocol. Levels 4-2 of this protocol, similar to ITU V.42, detect and correct data
errors caused by poor telephone line conditions. Level 5, similar to ITU V.42bis, includes data
compression.
mode Mode of operation for the DSU based on settings in effect and additional installed hardware features.
Modular DSU A DSU circuit card that contains gold finger contacts and is used with a rear connector plate. This circuit
card type is easily removed from the front of the carrier without disconnecting the DTE cables.
MPTC Factory Multipoint Control. Factory default configuration option settings.
MPTT Factory Multipoint Tributary. Factory default configuration option settings.
multiplex To combine many low-speed data sources into a single, high-speed serial data stream. The data is coded at
transmission, and decoded at reception. Some multiplexing techniques include Frequency Division
Multiplexing (FDM), Time Division Multiplexing (TDM), and Statistical Multiplexing (Stat MUX).
multipoint circuit A special type of circuit where one control device communicates in a broadcast mode with one or more
tributary devices. Communication from a tributary device is always directly to the control device, and not
to any of the other tributary devices.
MUX Multiplexer. A device that enables the simultaneous transmission of multiple independent data streams
into a single high-speed data stream.
network interface Use of alternate Port 1 as a form of backup by providing an internal aggregate data stream.
NMS Network Management System. A set of diagnostic and configuration management tools for a data
communication network, consisting of software programs and dedicated computer hardware.
non-disruptive Diagnostics that are transmitted over the in-band secondary channel or routed through a DBM in Standby
diagnostics mode so that primary data is not affected. The data rate and port speed(s) are not equal.
non-disruptive Executing the command will not disrupt primary data.
session
NT1 Network Termination One. Termination of ISDN U-interface from the Network.
3610-A2-GB46-60 December 1996
Glossary
Glossary-7