Paradyne 392xPLUS EIA-232-D, EIA RS-366-A, Error control, Escape sequence, Extended circuit, Host

Glossary

EIA	Electronic Industries Association. This organization provides standards for the data
	communications industry.
EIA-232-D	An Electronic Industries Association's standard defining the 25-position interface
	between data terminal equipment and data communications equipment.
EIA RS-366-A	An Electronic Industries Association's standard defining the 25-position interface
	between data terminal equipment and data communications automatic calling equipment.
error control	An algorithm used to correct data transmission errors.
escape sequence	Default setting is +++. This sequence lets you switch your modem from Data mode to
	Command mode.
extended circuit	See extended network.
extended network	The extension of a circuit where the tributary DCE is connected to a downstream
	(extended) control DCE.
extended result codes	An asynchronous message (in either numbers or words) that includes VF data rate and
	error control information the modem sends to the DTE after executing or trying to
	execute a command.
fallback	Retraining at a lower rate or speed.
FCC	Federal Communications Commission. Board of Commissioners that regulates all
	interstate and foreign electrical communication systems that originate from the United
	States.
FEC	Forward Error Correction. A method of error control for data transmission where the
	receiving device can detect and correct a character or block of code containing a
	predetermined number of erroneous bits.
FEP	Front-End Processor. A communications computer associated with a host computer that
	manages the routing of data through the network.
full-duplex	Simultaneous, two-way communications.
function key	Any one of three keys on the DCP that allows you to select or increment an LCD entry.
	Function keys are labeled F1, F2, and F3.
half-duplex	Two-way data communications allowed in only one direction at a time.
handshaking	The exchange of predetermined codes and signals (tones) to establish a connection
	between two modems.
HDLC	High-Level Data Link Control. A communications protocol defined by the International
	Standards Organization (ISO).
host	A computer attached to a network that shares its information and devices with the rest of
	the network.
Hz	A unit of frequency (Hertz) that equals one cycle per second.

3920-A2-GN31-30 November 1996 Glossary-5