AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual page 399

Glossary
endpoint
ESF
ESS
expansion carrier
extension
extension jack
extension
programming
extended superframe
format
GL–14
Maintenance and Troubleshooting
Final destination in the path of an electrical or
telecommunications signal.
(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.
(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.
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.
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.
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."
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 .
See ESF .