ADTRAN 1200218L1, Руководство пользователя

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Appendix D. Glossary
D-6 OSU 300 User Manual 61200663L1-1
DTE
data terminal equipment. The end-user terminal or computer that plugs into the
termination point (DCE) of a communications circuit. The main difference
between the DCE and the DTE is that pins two and three are reversed.
E1
Transmission rate of 2.048 Mbps on E1 communications lines. See also T1.
end device
The ultimate source or destination of data flowing through a network (some-
times referred to as DTE).
end user
Subscriber who uses (rather than provides) telecommunications services.
ES
errored seconds. A second with one or more coding violations (CVs).
Ethernet
Transmission protocol for packet-switching LANs.
facilities
The equipment used by carriers to provide communication services.
far end
The distant end to that being considered. Not the end where testing is being car-
ried out.
FCC
Federal Communications Commission. The U.S. federal agency responsible for
regulating interstate and international communications by radio, TV, wire, satel-
lite, and cable.
FDL
facility datalink. FDL bits provide overhead communication between the termi-
nal equipment in ESF framing.
gateway
A device which enables information to be exchanged between two dissimilar
systems or networks.