Lucent Technologies MERLIN LEGEND Release 6.1 System Programming

MERLIN LEGEND Communications System Release 6.1
System Programming Guide 555-661-111
Issue 1
August 1998
Glossary
Page GL-11
E
door answering
unit
Device connected to a basic telephone jack and used at an
unattended extension or front desk.
DOS (disk operating system)
drop-and-insert
equipment
A device that can be installed between systems connected
by
tandem PRI trunks or T1-emulated tandem tie trunks to
allow fractional use of the facility, that is, use of fewer than
23 of the PRI
B-channels or fewer than 24 of the T1
channels . In a PRI facility, the equipment must never drop
Channel 24, the
D-channel . All channels must still be
programmed and all count towards the system maximum of
80 lines.
DS0 (Digital Signal 0) Single 64-kbps voice or data channel.
DS1 (Digital Signal 1) Bit -oriented signaling interface that
multiplexes twenty-four 64-kbps channels into a single
1.544-Mbps stream.
DSL (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.
DSS (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.
DTE (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.
DTMF signaling (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.
E&M signaling 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 .
EIA (Electronic Industries Association)
EIA-232-D 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).
Electronic
Switching System
See ESS .
endpoint Final destination in the path of an electrical or
telecommunications signal.

Lucent Technologies MERLIN LEGEND Release 6.1 Specifications

General

Brand	Lucent Technologies
Model	MERLIN LEGEND Release 6.1
Category	Conference System
Language	English