Paradyne Comsphere 3920Plus Installation And Operation Manual page 273

MSD
multiplexer (mux)
multipoint line
network
network management
address
NIM
non-linear distortion
NMS
off-hook
on-hook
Originate mode
parity
PBX
permissive interface
phase jitter
physical address
point-to-point line
poll list
power-up self-test
product code
protocol
3920-A2-GN31-10
Modem Sharing Device. Allows from 2 to 4 physical ports to share a communication
channel.
A device that enables the simultaneous transmission of multiple independent data
streams into a single high-speed data stream.
A circuit connecting one control modem with one or more tributary modems.
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.
A rapid or repeated shifting of the relative phase of a signal resulting in unwanted
distortion.
The diagnostic address of a control modem derived from its location in the carrier: its
carrier and slot number.
A line or circuit connecting two stations.
A list containing the network management addresses of downstream modems.
A test that checks most hardware components when the modem is powered-on.
A three-digit code indicating the modem's highest VF data rate.
The rules for timing, format, error control, and flow control during data transmission.
April 1995
Glossary
Glossary-7