AT&T MERLIN LEGEND Release 3.1, Руководство по системному программированию

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Glossary
System Programming
GL–11
EIA-232-D Physical interface, specified by the EIA , that transmits and
receives asynchronous data at speeds of up to 19.2 Kbps
over cable distances of 50 ft (15m) or less.
Electronic
Switching System See ESS .
endpoint Final destination in the path of an electrical or
telecommunications signal.
ESF (extended superframe format) Framing format consisting of
individual frames of 24 eight- bit slots and one signal bit
(193 bits) in a 24-frame extended superframe. See also D4
framing format.
ESS (Electronic Switching System) Class of central office ( CO )
switching systems developed by AT&T in which the control
functions are performed principally by electronic data
processors operating under the direction of a stored
program.
expansion carrier Carrier added to the control unit when the basic carrier
cannot house all of the required modules. Houses a power
supply and up to six additional modules.
extension An endpoint on the internal side of the communications
system. An extension can be a telephone with or without an
adjunct. Also called “station.” See also
data station.
extension jack An analog, digital, or tip/ring physical interface on a
module in the control unit for connecting a telephone or
other device to the system. Also called “station jack.”
extension
programming Programming performed at an extension to customize
telephones for personal needs; users can program
features on buttons, set the telephone ringing pattern, and
so on. See also
extension programming and system
programming .
extended
superframe format See ESF .
F
facility Equipment (often a trunk ) constituting a
telecommunications path between the system and the
telephone company central office (
CO ).