Instruction manual

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting
555-650-140
Issue 1
June 1997
Glossary
Page GL-15
Direct Inward
Dialing
See DID .
Direct-Line Console See DLC.
Direct Station
Selector
See DSS.
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
provided by the AT&T 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
channel.
DS1 (Digital Signal Level 1)
Bit -oriented signaling inter-
face that multiplexes twenty-four 64-kbps channels
into a single 1.544-Mbps stream.