Lucent Technologies MERLIN LEGEND Release 6.1 Maintenance And Troubleshooting Manual page 471

MERLIN LEGEND Communications System Release 6.1
Maintenance and Troubleshooting 555-661-140
DTMF signaling
E
E&M signaling
EIA
EIA-232-D
Electronic
Switching System
endpoint
ESF
ESS
expansion carrier
(dual-tone multifrequency signaling) Touch-tone signaling
from telephones using the voice transmission path.
DTMF signaling provides 12 distinct signals, each
representing a dialed digit or character, and each
composed of two voiceband frequencies.
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 of 50 feet (15 m).
See ESS .
Final destination in the path of an electrical or
telecommunications signal.
(extended superframe format) PRI framing format
consisting of individual frames of 24 eight-bit slots and
one signal bit (193 bits) in a 24-frame extended
superframe.
(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.
Carrier added to the control unit when the basic carrier
cannot house all of the required modules. Houses a
power supply module and up to six additional modules.
Issue 1
August 1998
Page GL-15