ADTRAN IPR-S1000 manual Vsat

TCP/IP or Transmission Control Protocol

A connection oriented protocol designed for operation on the Internet. Considered to be a common language between otherwise incompatible computers.

TFTP

Trivial File Transfer Protocol. The simplified version of FTP. It enables file transfers between two computers over a network (see RFC 1350).

Transponder

Electronic device in a communication satellite receiving information from an earth station and re-sending it after frequency conversion and amplification to earth station(s) or consumers; there is generally one transponder per RF channel.

Tuner

An adjustment for variable selection or tuning of a center frequency or channel.

UDLR

UniDirectional Link Routing. Standardized mechanism for integrating unidirectional links in the Internet (see RFC 3077).

UNICAST

Unicast is communication between a single sender and a single receiver over a network. The term exists in contradistinction to multicast, communication between a single sender and multiple receivers.

UPLINK

Communication link from an earth station to a satellite, supplying the information to be rebroadcast by one or more transponder(s).

USB

Universal Serial Bus. Serial 4-wire bus architecture for peripheral I/O ports, that autosenses up to 128 peripherals at a distance of 5 m (16.4ft.) and at a maximum data rate of 12 Mbps.

VSAT

Very Small Aperture Terminal. This is normally a two-way satellite transmission system.

WAN

Wide-Area Network. A data-communications network spread accross a wide geographic area and incorporating a large number of users. A WAN often uses transmission devices provided by common carriers. Examples of WANs include Frame Relay, SMDS, and X.25.

Watchdog

Device or software being used to supervise a particular event and acting (for example giving alarm) in the event of abnormal operation.

WEB/WWW

Short for World Wide Web.

Wireless

Transmission without a physical connection between stations.