AT&T MERLIN LEGEND Release 3.0 System Programming And Maintenance Manual page 104

Glossary
E
E&M signaling
EIA
EIA-232-D
endpoint
ESF
expansion carrier
extension
extension jack
GL-14
System Programming and Maintenance (SPM)
Trunk supervisory signaling, used between two
communications systems, in which signaling
information is transferred through two-state
voltage conditions (on the Ear and Mouth
leads) for analog applications and through two
bits for digital applications. See also tie trunk.
(Electronic Industries Association)
Physical interface, specified by the EIA, that
transmits and receives asynchronous data at
speeds of up to 19.2 Kbps over cable
distances of50ft(15m) or less.
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 04 framing
format.
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."
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