Alcatel Speed Touch 591s, Техническое руководство пользователя, Страница: 171 / 184

Glossary
Speed Touch 591s Technical Practices GL-3
February 2001 90-8785-01
CTS clear to send
DCD data carrier detect
DCD is a V.24 control signal from the DCE to the connected DTE,
indicating that the DCE is receiving a carrier signal from another DCE at the
other end of the circuit.
DCE a) data circuit-terminating equipment
b) data communications equipment
DCE refers to the gender of the interface on a data device, such as a modem
or transceiver. The pinout wiring is such that pin 2 receives data and pin 3
transmits data. The DCE must be connected to a DTE device.
DE discard eligibility
The DE is a bit in the header of each frame relay frame that, when set,
indicates that the frame should be discarded when network congestion has
increased past an acceptable level. The frame is discarded in preference to
others that do not have the DE bit set.
DLC data link connection
A DLC represents a segment of a PVC. The connection can be between an
end-user device and a network device or between one network device and
another.
DLCI data link connection identifier
Address within the Q.922 frame that identifies the logical connection within
a physical channel with which a frame is associated. See also DLC.
DSL digital subscriber line
DSLAM digital subscriber line access multiplexer
A DSLAM card converts multiple ADSL lines into ATM traffic. For a
service management application, if the service user is connected to the ATM
network through a DSLAM port, then you provision a network access using
a DSLAM attachment type.
DSR data set ready
DSR is a V.24 control signal.
DTE data termination equipment
DTE is a communications interface such as a computer or terminal system.
DTR data terminal ready
DTR is a V-series control signal sent from the DTE to the DCE indicating
that the DTE is powered and ready to communicate. DTR can also be used
for hardware flow control.
EFCI explicit forward congestion indication