Paradyne 3000 manual Doc

Glossary

Diagnostic Console	An AT&T DATAPHONE II NMS that uses the DATAPHONE II protocol.
DIP switch	Dual In-line Package switch.
Direct Distance Dialing	Telephone exchange service, the public switched telephone network (PSTN), that
(DDD)	enables a telephone service user to access telephone lines without operator
	assistance.
D-lead control	A control signal method which causes the associated modem to go off-hook in the
	Originate mode. With D-lead control signaling, a single signal lead is associated
	with each modem. Momentary connection of this lead to common ground actuates
	the signal.
DMC	Diagnostic MicroComputer. The network management protocol used by AT&T
	Paradyne ANALYSISt6510 NMS.
DSU	Data Service Unit. Data communications equipment which transmits digital data
	over a private line. Also used for limited distance communications over the PSTN
	when a high-speed modem is not needed.
DOC	Canadian Department of Communication.
EIA	Electronic Industries Association. This organization provides standards for the data
	communications industry to ensure uniformity of interface between DTEs and
	DCEs.
extended network	The extension of a circuit where the tributary DCEs are connected to an extended
	control DCE. (Also called a tail circuit or an off-network extension.)
FCC	Federal Communications Commission. Board of Commissioners that regulates all
	interstate and foreign electrical communication systems that originate from the
	United States.
IEC	InterExchange Carrier. A company that provides inter-LATA (local exchange
	carrier) telecommunications services, like AT&T, MCIr, and US SPRINTr. Access
	to these services can be provided through DDS dedicated channels, T1.5 dedicated
	access channels, or digital switched access (DSA) channels.
LADS	Local Area Data Set (also called a limited-distance modem).
LATA	Local Area Transport Area. A region served by a local exchange carrier (LEC) that
	consists of one or more area codes.
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.
LEC	Local Exchange Carrier. A company that provides intra-LATA (local exchange
	carrier) telecommunications services, like NYNEX or Bell South.
LED	Light-Emitting Diode. A light or status indicator on the control panel that glows in
	response to the presence of a certain condition (e.g., Alrm).

3000-A2-GA31-80 December 1994 Glossary-3