Instruction manual

MERLIN LEGEND Communications System Release 5.0
Installation
555-650-140
Issue 1
June 1997
Glossary
Page GL-15
display buttons Buttons on an MLX display telephone used to access
the telephone’s display.
DLC (Direct-Line Console) Telephone used by a system
operator to answer outside calls (not directed to an
individual or a group) and inside calls, transfer calls,
make outside calls for users with outward calling
restrictions, set up conference calls, and monitor
system operation.
DNIS (Dialed Number Identification Service) Service pro-
vided by the Lucent Technologies Switched Network
(
ASN ); it routes incoming 800 or 900 calls according
to customer-selected parameters, such as area
code, state, or time of call.
door answering
unit
Device connected to a basic telephone jack and
used at an unattended extension or front desk.
DOS (disk operating system)
DS0 (Digital Signal 0) Single 64-kbps voice or data
chan-
nel
.
DS1 (Digital Signal Level 1)
Bit -oriented signaling inter-
face that multiplexes twenty-four 64-kbps channels
into a single 1.544-Mbps stream.