Xpeed 320R, Руководство пользователя

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Appendix E
Glossary
10Base-T - A 10 MBPS Ethernet LAN that runs over twisted pair wiring. This
network interface was originally designed to run over ordinary twisted pair (phone
wiring) but is predominantly used with Category 3 or 5 cabling.
100Base-T - A 100 MBPS Ethernet LAN that runs over twisted pair wiring. It is
the new Ethernet networking standard and is backward compatible with 10Base-T
networks. Commonly referred to as Fast Ethernet.
2B1Q (Two Binary, One Quaternary) - A line coding technique used in SDSL and
traditional telecommunications offerings, including ISDN.
Adapter card - Circuit board, usually installed in a personal computer, that pro-
vides the physical interface to a communications network. Also called a Network
Interface Card (NIC).
ADSL (Asymmetric Digital Subscriber Line) - Asymmetric refers to the fact that
the downstream bandwidth can outweigh the upstream bandwidth. This asymme-
try is a good fit for video on demand and Internet access applications where large
amounts of information is transmitted to the end-user, but little amounts of data is
transmitted back up.
Always On - Refers to a feature of DSL where the connection to the Service Pro-
vider’s network is always enabled in a way similar to a LAN. This is in contrast to
traditional dial-up services, where users have to “dial-in” to setup a connection to
the network.