MERLIN LEGEND Communications System Release 7.0
System Programming
555-670-111
Issue 1
April 1999
Glossary
GL-10
Delay-Start Tie
Trunk
Tie trunk
or
tandem tie trunk
on which the originating end of
the tie trunk transmits an off-hook signal to the receiving
end and waits for the receiving end to send an off-hook
signal followed by an on-hook signal. Also called “dial-
repeating tie trunk.”
Desktop
Videoconferencing
System
System application that allows face-to-face, simultaneous
video and voice communications between individuals and
requires high-speed data transmission facilities. See also
Group Videoconferencing System
.
DFT
Direct Facility Termination
.
DHG
Data Hunt Group
. Group of analog or digital
data stations
that share a common access code. Calls are connected in
a round-robin fashion to the first available data station in
the group.
Dial Access
See
.
Dialed Number
Identification
Service
See
Dial-Out Code
Digit (usually a
9
) or digits dialed by telephone users to get
an outside line.
Dial Plan
Numbering scheme for system extensions, lines, and
trunks.
Dial-Repeating Tie
Trunk
Tie trunk
on which the originating end of the tie trunk
transmits an off-hook signal to the receiving end and waits
for the receiving end to send an off-hook signal followed by
an on-hook signal. Also called “dial-repeating tie trunk.”
DID
Direct Inward Dial
. Service that transmits from the
telephone company central office and routes incoming calls
directly to the called extension,
calling group
, or outgoing
line/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
.
Digital
Communications
Protocol
See
.
Digital Data
Station
See
ISDN Terminal Adapter Data Station
.
Digital Signal 0
See
Digital Signal 1
See
