Lucent Technologies 555-661-150 manual Dft, Dhg, Did

MERLIN LEGEND Communications System Release 6.1		Issue 1
Network Reference 555-661-150	August 1998
Glossary
	Page GL-9
D-channel	(Data-channel) 16- or 64-kbps channel that carries
	signaling information or data on a PRI or BRI.
dedicated feature	The imprinted feature buttons on a telephone: Conf or
buttons	Conference, Drop, Feature, HFAI (Hands Free Answer on
	Intercom), Hold, Message, Mute or Microphone, Recall,
	Speakerphone or Spkrphone, and Transfer.
delay-start tie	Tie trunk or tandem tie trunk on which the originating end of
trunk	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	A system application that allows face-to-face,
videoconferencing	simultaneous video and voice communications between
system	individuals and requires high-speed data transmission
	facilities. See also group videoconferencing system.
DFT	(direct facility termination) See personal line.
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 feature code.
Dialed Number	See DNIS.
Identification
Service
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	Tie trunk on which the originating end of the tie trunk
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 analog transmission.
Digital	See DCP.
Communications
Protocol
digital data station	See ISDN terminal adapter data station.
Digital Signal 0	See DS0.