Lucent Technologies MERLIN LEGEND 6 System Manager's Manual page 435

MERLIN LEGEND Communications System Release 6.0
System Manager's Guide 555-660-118
Glossary
DSL
DSS
DTE
DTMF signaling
E
E&M signaling
EIA
EIA-232-D
Electronic
Switching System
endpoint
ESF
ESS
expansion carrier
ExpressRoute
1000
(Digital Subscriber Line) A Digital Subscriber Line provides
full-duplex service on a single twisted metallic pair (2-wire)
at a rate sufficient to support ISDN Basic Rate Access.
(Direct Station Selector) 60-button adjunct that enhances
the call-handling capabilities of an MLX-20L or MLX-28D
telephone used as an operator console.
(data terminal equipment) Equipment that makes the
endpoints in a connection over a data connection; for
example, a data terminal, personal computer, host
computer, or printer.
(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.
Data communications device that allows connection
between an RS-232 DTE device and the control unit using
MLX extension jacks on the 008 MLX or 408 GS/LS-MLX
module.
Issue 1
February 1998
Page GL-11