Glossary
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EN/LZT1083982 R4
2000-12-07
10Base-T
One of several adaptations of the Ethernet standard for Local Area Networks (LANs).
The 10Base-T standard (also called Twisted Pair Ethernet) uses a twisted-pair cable with
maximum lengths of 100 metres. Cables in the 10Base-T system connect with RJ-45
connectors.
T1.413
One of four ADSL modes that the HM220dp ADSL modem can operate in.
Asymmetric Digital Subscriber Line full rate according to ANSI T1.413 Issue 2 standard,
which allows the ADSL line to support up to 8 Mbps downstream and 864 kbps
upstream. T1.413 ADSL is used to cooperate with a POTS telephone line and requires
that a device called a POTS splitter be installed at the subscriber's or business premises.
TCP
Short for Transmission Control Protocol, and pronounced as separate letters. TCP is one
of the main protocols in TCP/IP networks. Whereas the IP protocol deals only with
packets, TCP enables two hosts to establish a connection and exchange streams of data.
TCP guarantees delivery of data and also guarantees that packets will be delivered in the
same order in which they were sent.
TCP/IP
Short for Transmission Control Protocol/Internet Protocol, the suite of communications
protocols used to connect hosts on the Internet. TCP/IP uses several protocols, the two
main ones being TCP and IP. TCP/IP is built into the UNIX operating system and is used
by the Internet, making it the de facto standard for transmitting data over networks.
Upstream
The direction of an upstream signal is from the user's computer to the headend.
URL
Abbreviation of Uniform Resource Locator, the global address of documents and other
resources on the World Wide Web. The first part of the address indicates what protocol to
use, and the second part specifies the IP address or the domain name where the recourse
is located.
USB
Short for Universal Serial Bus, a new external bus standard that supports data transfer
rates of 12 Mbps. A single USB port can be used to connect up to 127 peripheral devices,
such as mice, modems and keyboards. USB also supports Plug-and-Play installation and
hot plugging.
User name
A name used to gain access to a computer system. User names (and often passwords) are
required in multiuser systems.