Instruction manual

Glossary
Dialed Number
Identification
Service
See
DNIS .
dial-out code
Digit (usually a
) or digits dialed by telephone users to
get an outside line.
dial plan
Numbering scheme for system extensions, lines, and
trunks.
DID
(Direct Inward Dialing) Service that transmits from the
telephone company central office and routes incoming
calls directly to the called extension,
calling group , or
outgoing trunk
pool , bypassing the system operator.
DID trunk
Incoming trunk that receives dialed digits from the local
exchange, allowing the system to connect directly to an
extension without assistance from the system operator.
digital
Representation of information in discrete elements such as
off and on or zero and one. See also
analog transmission .
Digital Signal 0
See
DS0 .
Digital Signal 1
See
DS1 .
digital subscriber
line
See
DSL .
digital transmission
Mode of transmission in which the information to be
transmitted is first converted to digital form and then
transmitted as a serial stream of pulses. See also
analog
transmission
.
direct facility
termination
(DFT) See
personal line .
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.
System Manager's Guide
GL–
7