BT glossary - T

This glossary is here to help you understand some of the acronyms you may encounter in this site. Select a letter below that your word begins with.

A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y
Abbreviation Term Definition



An American term for describing the capacity of a digital transmission system as a multiple of 1.544 Mbit/s (24 x 56kbit/s). T1 carries 1544kbit/s, T2 6312kbit/s, T3 44736kbit/s, T4 97728kbit/s. The corresponding European measures use an E- prefix and are in multiples of 2048kbit/s (E1).



Short for telephone company.



See Teleworking.



Describes the commercial use of computers and telecommunications systems to produce advanced business services.



Use of satellite and web communications to access telemetry data from remote sensors.



Telephone Server Application Programming Interface

Telephony Server API, an API developed by Novell and AT&T that enables programmers to build telephony and CTI applications. TSAPI is similar to TAPI, but whereas TAPI has been implemented for the Windows operating system, TSAPI runs on NetWare platforms. Another key difference is that TAPI can be used for both client- and server-based applications whereas TSAPI is strictly a server API.



Telephony Application Programming Interface

A number of IT companies, led by Microsoft and Intel, have collaborated to design a common Windows graphical user interface for telephony and a Telephony Application Programming Interface (TAPI). This provides software developers with a common means of designing applications that control telephone, ISDN and even wire-free telephony functions.



Telepresence is the state of being present at a distance. For business it can enable teams who cannot be together work together. It can also change the relationship between the company and its customers - past, present, and future - by inviting the whole community of people interested in the company together in a place. Not a real place, but a virtual place on the internet. Any technology or device that helps people come together can facilitate telepresence, from the humble audio conference and email, through enhanced technologies like video conferencing and audio data conferencing, up to 3D virtual worlds at the research end of the scale.



The practice of working at a distance from the employer, either at home or at a telecottage, generally relying on electronic means to deliver the work or to provide the service in question.



A means of allowing internet users to log into remote computers across the world.



Third-Party Maintenance




Time Division Multiple Access

A digital radio technology that boost equivalent analogue capacity by up to three times through more efficient use of the radio spectrum.



Time-Domain Reflectometer

A tool that finds discontinuities and other faults in transmission lines.


Token ring

The second most popular LAN technology, originally IBM's answer to Ethernet, now the IEEE 802.5 standard. Runs at either four or 16 Mbits/sec. Two to three times more expensive than Ethernet.



Trans European Trunked Radio

A European standard, now well advanced., for providing business radio on a shared network.



Transmission Control Protocol/Internet Protocol

Transmission Control Protocol / Internet Protocol. All information travels across the internet in small 'packets' that are reassembled into the full message on arrival at the destination. TCP/IP is the mechanism that controls this and it is the basis of all internet communications.



Transmit, Transmitter, Transmitting (according to context)