AT&T MERLIN LEGEND Release 3.1, Руководство по системному программированию

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Glossary
GL–8
System Programming
data rate See bps .
data station Special type of extension where data communications take
place; includes
DTE and DCE ; sometimes a telephone is
also part of a data station.
data terminal An input/output ( I/0 ) device (often a personal computer)
that can be connected to the control unit via an interface.
data terminal
equipment See DTE and data terminal .
DCE (data communications equipment) Equipment such as
modem s or data modules used to establish, maintain, and
terminate a connection between the system and data
terminal equipment (
DTE ), such as printers, personal
computers, host computers, or network workstations.
D-channel (Data-channel) 16-or 64-kbps channel that carries
signaling information or data on a
PRI .
DCP (Digital Communications Protocol) AT&T proprietary
protocol to transmit digitized voice and data over the same
communications link. A DCP link is made up of two 64-
kbps information (I) channels and one signaling (S)
channel to the B- and D-channels used in an
ISDN .
dedicated feature
buttons The imprinted feature buttons on a telephone: Conf or
Conference, Drop, Feature, HFAI (Hands Free Answer on
Intercom), Hold, Message, Mute or Microphone, Recall ,
Speaker or Speakerphone , and Transfer .
delay-dial-start 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.”
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
identification
Service See DNIS .
dial-out code Digit (usually a
9
) or digits dialed by telephone users to get
an outside line.