Time-and-Attendance A system for recording worker arrival and departure times for the purpose of payroll or other management functions.
Time Zone A period of time that has been programmed into an access control system during which authorized users either can or cannot gain access.
Transformer An electric device that changes voltage in direct proportion to current and in inverse proportion to the ratio of the number of turns of primary and secondary windings. The output low-voltage side is called the transformer secondary.
Transient Any increase or decrease in the excursion of voltage, current, power, heat and so forth, above or below a nominal value that is not normal to the source.
Twisted Pair A cable that consists of one or more pairs of insulated wires that are twisted around one another. Twisted pair is often specified for circuits carrying data.