Paradyne 3510 - Manual (Page 79)

Glossary-1 3510-A2-GN32-60 March 1999
Glossary
carrier A framework containing slots for circuit cards. The 3000 Series Carrier fits in a 19-
or 23-inch rack and accommodates up to 16 DSUs.
Clear-to-Send
(CTS) A signal issued by a DSU to indicate that it is connected to the digital network and
is ready to accept data.
Consultive Committee for
International Telegraphy
and Telephony (CCITT) Consultative Committee on International Telegraphy and Telephony. An advisory
committee established by the United Nations to recommend communications
standards and policies. It was renamed ITU in March 1993.
control A data service unit (DSU) that is generally collocated with the host computer.
Data Communication
Equipment (DCE) Equipment used for data transmission and reception.
Data Service Unit
(DSU) A piece of equipment used to connect various types of data terminal equipment
(DTEs) to a digital network.
Data Set Ready
(DSR) A signal issued by the DSU to indicate that it is powered on and ready to transmit
data.
Data Terminal Equipment
(DTE) Terminal equipment connected to the DSU that is used for communication over
digital networks. May be a terminal, computer, printer, or multiplexer.
Data Terminal Ready
(DTR) An EIA-232-D signal which indicates that the DTE is ready for operation.
DATAPHONE II DSU An earlier generation data service unit (DSU).
DATAPHONE Digital
Service (DDS) An AT&T digital network used for communication among various types of DTEs.
Digital Data Service (DDS) A digital network.
Digital Loopback
(DL) A type of diagnostic test in which data is looped from the network through a DSU
back to the digital network.
Electronic Industries
Association (EIA) An organization which sets data communication industry standards.
ITU-T The Telecommunications Standardization Sector of the International
Telecommunications Union, an advisory committee established by the United
Nations to recommend communications standards and policies. Before March 1993
it was called CCITT.