PictureTel Concorde 4500 Servicing Manual page 207

data circuit-terminating equipment (DCE)
A term that refers to the network side of a communications link.
data terminal equipment (DTE)
A term that refers to the terminal side of a communications link.
data terminal ready (DTR)
An RS-232 signal that indicates the terminal is ready to communicate.
DB-25
The 25-pin connector ordinarily used for RS-232.
decoder
An entity that reconstructs data from one format back to its native format.
dedicated line
A connection between two pieces of equipment.
dedicated network
A permanent connection between two sites that carries high bandwidth digital signals. See
also switched network.
depacketization
A procedure in which application data (audio, video, and/or transparent user data) is
extracted from the lower level communication protocol data packets.
dialing port
An RS-366 port on the IMX that supports placing a videoconferencing call from a
Concorde¥4500 system.
digital data
Data in the form of any whole number (from 0 through 9). See also analog data.
DIN
Deutsche Industrie Norm
dual 56 kbps
A 112 kbps video transmission that uses two data lines at 56 kbps from the VCS to the
network equipment. See also Nx56 kbps.
dual 64 kbps
A 128 kbps video transmission that uses two data lines at 64 kbps from the VCS to the
network equipment. See also Nx64 kbps.
Glossary-3