Lucent Technologies MERLIN LEGEND Release 5.0 Maintenance And Troubleshooting Manual page 434

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting 555-650-140
Glossary
DSS
DTE
DTMF signaling
E
E&M signaling
EIA
EIA-232-D
Electronic
Switching System
(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 sig-
naling 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 com-
munications 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 ft. (15
m.)
See ESS.
Issue 1
June 1997
Page GL-16