Paradyne 3800PLUS manual leased line

COMSPHERE 3800Plus Modems

LCD	Liquid Crystal Display. A thin sandwich of two sealed glass plates containing liquid
	crystal material. When voltage is applied, the amount of light able to pass through the
	glass plates is altered so that messages may be ``writtenº on the display.
leased line	A private line connection exclusively for the user. No dialing is necessary.
LED	Light-Emitting Diode. A light or status indicator on the DCP that glows in response to
	the presence of a certain condition (e.g., Alrm).
local analog loopback	The modem's transmit VF signal is looped to its receiver.
long space disconnect	A disconnect can occur if the modem receives an extended space from a remote modem;
	for example, when a remote modem is commanded to disconnect, it transmits a
	continuous space to the modem before disconnecting.
loopback test	Any test that verifies a device's integrity by connecting the device's output of one
	direction to the device's input of the other direction, then checking the received signal for
	errors.
LSD	Line Signal Detect. A signal between the DTE and modem indicating energy exists on
	the transmission circuit.
menu tree	The structure containing the 3800Plus menu hierarchy starting at a Top-Level menu and
	extending down to various modem functions.
MNP	This protocol (Microcom Networking Protocol) detects and corrects data errors caused
	by telephone line noise and signal distortion. MNP5 includes data compression.
modem	(Modulator/DEModulator). A device that transforms signals from digital to analog form
	and vice versa.
modulation	The process of varying some characteristics (usually amplitude, frequency, and/or phase)
	of a carrier wave to form data transmissions.
network	A communications circuit.
network address	The customer-assigned diagnostic address of a tributary modem.
NIM	Network Interface Module. The interface provided, up to two per carrier, for the public
	switched telephone network (PSTN) used by 3811Plus modems.
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.
off-hook	The condition of a telephone or modem that is being used to establish or maintain
	communication.
offline	The condition of a modem that is not connected to another modem.
on-hook	The condition of a telephone or modem that is not being used.
online	The condition of a modem that is connected to and communicating with another modem.

Glossary-6 November 1996 3980-A2-GB30-20