Instruction manual

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting
555-650-140
Issue 1
June 1997
Glossary
Page GL-17
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 Lucent
Technologies 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 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
customize telephones for personal needs; users can
program features on buttons, set the telephone
ringing pattern, and so on.
See also centralized
telephone programming and system programming.
extended super-
frame format
See ESF.