（单词翻译:单击）
Terrestrial Microwave Radio
Terrestrial microwave radio is a transmission systems consisting of at least two radio transmitter/receivers (transceivers) connected to high gain antennas1 (directional antennas which concentrate electromagnetic or radiowave energy in narrow beams) focused in pairs on each other. The operation is point-to-point, that is, communications are established between two and only two antennas (installations) with line-of-sight visibility. This can be contrasted to point-to- multipoint systems like broadcast radio or television.
TIA
Telecommunications Industry Association
Time Division Multiplexing (TDM)
Time Division Multiplexing is a transmission facility shared in time (rather than frequency), i.e., signals from several sources share a single channel or bus by using the channel or bus in successive time slots. A discrete2 time slot or interval3 is assigned to each signal source.
Time Division Switch
A time division switch is a switch that implements4 the switch matrix using the TDM process, in a time-slot interchange (TSI) arrangement (usually denoted by T in combined time and space division switches).
Token Passing Bus LAN (IEEE 802.4)
A token passing bus LAN is a LAN using a deterministic access mechanism5 and topology in which all stations actively6 attached to the bus "listen" for a broadcast token or supervisory frame. Stations wishing to transmit must receive the token before doing so; however the next logical station to transmit may not be the next physical station on the bus. Access is controlled by pre- assigned priority algorithms.
Token Passing Ring LAN (IEEE 802.5)
A token passing ring LAN is a LAN using a deterministic access mechanism and topology, in which a supervisory frame (or token) is passed from station to adjacent station sequentially. Stations wishing to transmit must wait for the "free" token to arrive before transmitting data. In a token ring LAN the start and end points of the medium are physically7 connected, leading to a ring topology.
TP
transaction processing
Tracking
Tracking features user-defined approval levels and project milestone8 tables to generate project cost and status information, which is tracked for reporting and review. As assigned tasks are completed, supervisors9 make daily entries identifying the number of hours worked on a task, materials used, and the number of work units completed. This information is then available for project jeopardy10 tracking, cost tracking, and determination of contractor11 payments due.
Traffic
Traffic is the flow of information within a telecommunications network.
Transceiver
A transceiver is a generic12 term describing a device that can both transmit and receive. In IEEE 802 local area network (LAN) standards, a transceiver consists of a transmitter, receiver, power converter, and, for CSMA/CD LANs, collision detector13 and jabber14 detector capabilities15. The transmitter receives signals from an attached terminal's network interface16 card (NIC) and transmits them to the coaxial cable or other LAN medium. The receiver receives signals from the medium and transmits them via the transceiver cable and NIC to the attached terminal. The jabber detector is a timer circuit that protects the LAN from a continuously transmitting terminal.
Transfer Mode
Transfer mode is a generic term for switching and multiplexing aspects of broadband integrated services digital networks (BISDN), adopted by CCITT Study Group XVIII.
Transmission control protocol17/internet protocol (TCP/IP)
See "Internet suite18 of protocols19" and "TCP/IP".
