Instruction manual

MERLIN LEGEND Communications System Release 5.0
Installation
555-650-140
Issue 1
June 1997
Glossary
Page GL-17
endpoint Final destination in the path of an electrical or tele-
communications signal.
ESF (extended superframe format)
Framing format con-
sisting 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 Lucent
Technologies in which the control functions are per-
formed principally by electronic data processors
operating under the direction of a stored program.
expansion carrier
Carrier added to the control unit when the basic car-
rier cannot house all of the required
modules.
Houses a power supply and up to six additional mod-
ules.
extension An endpoint on the internal side of the communica-
tions 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 custom-
ize telephones for personal needs; users can pro-
gram features on buttons, set the telephone ringing
pattern, and so on. See also centralized telephone
programming and system programming.
extended
superframe format
See ESF
.