Paradyne 7510 DSU EIA-232, Excessive BPV, Factory defaults, Frame relay, Full-duplex, Interface

Glossary

DMI	Data Mode Idle. Refers to a sequence of ones transmitted or received on the DDS
	network.
DSR	Data Set Ready. An EIA-lead standard for V.24 circuit CT 107; an output signal
	(DCE-to-DTE).
DSU	Data Service Unit. Data communications equipment that provides an interface between the
	DTE and the digital network.
DTE	Data Terminal Equipment. The equipment, such as computers and printers, that provides
	or creates data.
DTR	Data Terminal Ready. An EIA-lead standard for V.24 circuit CT 108; an input signal
	(DTE-to-DCE).
EIA	Electronic Industries Association. This organization provides standards for the data
	communications industry to ensure uniformity of interface between DTEs and DCEs.
EIA-232	The EIA's standards defining the 25-pin interface between the DTE and DCE.
excessive BPV	An excessive bipolar violation condition results when at least one invalid bipolar violation
	has occurred every 20 milliseconds for 2 seconds.
factory defaults	A predetermined set of configuration options for general operation.
FCC	Federal Communications Commission. Board of Commissioners that regulates all U.S.
	interstate, intrastate, and foreign electrical communication systems that originate from the
	United States.
frame relay	A switching interface that is designed to get frames from one part of the network to another
	as quickly as possible.
full-duplex	The capability to transmit in two directions simultaneously.
HDLC	High-Level Data Link Control. A communications protocol defined by the International
	Standards Organization (ISO).
interface	A shared boundary between functional units.
ITU	International Telecommunication Union, formerly known as CCITT . An advisory committee
	established by the United Nations to recommend communications standards and policies.
LADS	Local Area Data Set is used to provide a point-to-point link between two devices (also
	called LDM ± limited distance modem).
LAN	Local Area Network. A network designed to connect devices over short distances, like
	within a building.
latching loopback	A latching loopback can only be initiated or terminated by the 64 kbps clear channel
	network service provider.
LED	Light Emitting Diode. A status indicator that responds to the presence of a certain
	conditions.
link layer protocol	The protocol that regulates the communication between two network nodes.
LL	Local Loopback. An EIA-lead standard for V.24 circuit CT 141; an input signal
	(DTE-to-DCE).
loopback	Used to test various portions of a data link in order to isolate an equipment or data line
	problem. A diagnostic procedure that sends a test message back to its origination point.
LSD	Line Signal Detect. An EIA-lead standard for V.24 circuit CT 109; an output signal
	(DCE-to-DTE).

GL-2 November 1997 7510-A2-GB20-10