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Appendix D. Glossary
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.
host computer
The primary or controlling computer in a multiple computer operation.
idle code
In a T3 circuit, an idle code consists of a sequence of 1100 over the entire payload
bandwidth.
in-band
Signaling (dialing, diagnostics, management, configuration, etc.) over the same
channel used for data.
IP
internet protocol. A protocol which provides for transmitting blocks of data
between hosts identified by fixed-length addresses.
D-6
MX2800 User Manual
61200290L1-1
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