Paradyne COMSPHERE 3920PLUS Technical Reference Manual page 344

MNP
modem
modulation
MSD
multiplexer (mux)
multipoint line
Multiport mode
network
network management
address
NIM
non-linear distortion
NMS
off-hook
on-hook
Originate mode
parity
PBX
permissive interface
3920-A2-GH30-40
This protocol (Microcom Networking Protocol) detects and corrects data errors caused
by telephone line noise and signal distortion. MNP5 includes data compression.
(Modulator/DEModulator). A device that transforms signals from digital to analog form
and vice versa.
The process of varying some characteristics (usually amplitude, frequency, and/or phase)
of a carrier wave to form data transmissions.
Modem Sharing Device. Allows from 2 to 4 physical ports to share a communication
channel.
A device used to simultaneously transmit multiple independent data streams into a single
high-speed data stream. There are a number of different types of multiplexers: FDM
(frequency division multiplexing), TDM (time division multiplexing), and STDM
(statistical time division multiplexing).
A circuit connecting one control modem with one or more tributary modems.
A mode of operation available only on 392xPlus multiport modems. It is determined by
your modem model and the selected MUX mode configuration option. Multiport mode is
in effect when the MUX mode configuration option is set to TDM/MSD or DTE_Bridge.
It supports from one to four ports depending on how the modem is further configured.
A communications circuit.
The customer-assigned diagnostic address of a modem.
Network Interface Module. The interface provided, up to two per carrier, for the public
switched telephone network (PSTN).
VF line distortion which is usually associated with pulse-code modulation (PCM)
compandor noise on the phone line.
Network Management System. A set of diagnostic and configuration management tools
for a data communication network, consisting of software programs and dedicated
computer hardware.
A telephone or modem is being used.
A telephone or modem is not being used.
The modem is in a state where it is ready to transmit a call. In a dial network, it is the
modem that makes the call. In a leased-line network, it is one of two sides of the network
that is selected to be the originating modem.
A way of checking data accuracy by counting the number of bits that have a value of
one.
Telephone switching equipment (Private Branch Exchange) dedicated to one customer. A
PBX connects private telephones to each other and to the public dial network.
A dial modem operating mode characterized by a fixed output power level of –9 dBm.
October 1998
Glossary
Glossary-7