Wire World Of America 1800 - Manual (Page 144)

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S
SCSI. See Small Computer System Interface.
Small Computer System Interface (SCSI). A type of interface between computers and peripherals that
allows faster communication than most other interface standards, often used to connect PCs to external
disk drives.
Splitter. 1. For networking applications, a splitter is a device that splits a connection for use by two distinct
outputs. 2. For DSL applications, a splitter is a device that sits on the outside of a residence that splits out
the voice and data frequencies on the incoming phone line.
Splitterless. A DSL installation that does not use a splitter.
Switch. A device that selects paths or circuits. Routers are smart switches.
Symmetric Digital Subscriber Line (SDSL). A DSL technology that provides a maximum bandwidth of
1.5 Megabits per second using one phone line, with a downstream transmission rate that equals the
upstream transmission rate, and that allows use of POTS service on the same phone line. Contrast with
Asymmetric Digital Subscriber Line.
T
T141. The American National Standards Institute (ANSI) standard for asymmetric digital subscriber line
using discrete multitone modulation, which the full-rate ADSL/G.dmt standard is based on.
TCP. See Transmission Control Protocol/Internet Protocol.
TCP/IP. See Transmission Control Protocol/Internet Protocol.
Telephone Exchange. A telephone company facility that handles the switching of telephone calls on the
public switched telephone network (PSTN) for a small regional area.
Terabyte. 1,000,000,000,000 bytes, or 1,000 gigabytes. See Byte.
Time Division Multiplexing (TDM). A digital data transmission method that takes signals from multiple
sources, divides them into pieces which are then placed periodically into time slots, transmits them down a
single path and reassembles the time slots back into multiple signals on the remote end of the transmission.
Token Ring. A ring-like type of local area network whereby a “token” is passed to the workstations within
the network.
Transmission Control Protocol/Internet Protocol (TCP/IP). A method of packet-switched data
transmission used on the Internet. The protocol specifies the manner in which a signal is divided into parts,
as well as the manner in which “address” information is added to each packet to ensure that it reaches its
destination and can be reassembled into the original message.
Twisted Pair. The set of two copper wires used to connect a telephone customer with a switching office,
loosely wrapped around each other to minimize interference from other twisted pairs in the same bundle.
Synonymous with 2-wire line.