signaling equipment
91Mini survival kit — A mini survival kit kept in a medium tin box A mini survival kit is a survival kit which consists of those most essential outdoor survival tools and supplies which are the hardest to improvise or replace. A mini survival kit is intended to be… …
92Selective calling — SECAL redirects here. For the French wine grape also known as Secal, see Jurançon (grape). In a conventional, analog two way radio system, a standard radio has noise squelch or carrier squelch which allows a radio to receive all transmissions.… …
93Number Five Crossbar Switching System — The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though… …
94Voice over IP — Digital voice redirects here. For the commercial service, see Comcast Digital Voice. Voice over Internet Protocol (Voice over IP, VoIP) is a family of technologies, methodologies, communication protocols, and transmission techniques for the… …
95Mobile radio — This article is about professional equipment. For mobile radios used in amateur radio, see amateur radio mobile operation. Mobile radio or mobiles refer to wireless communications systems and devices which are based on radio frequencies, and… …
96Uninterruptible power supply — A small free standing UPS …
97Railway signal — Not to be confused with Railway signalling. A signal is a mechanical or electrical device erected beside a railway line to pass information relating to the state of the line ahead to train/engine drivers. The driver interprets the signal s… …
98ADT Security Services — Infobox Company company name = ADT Fire Security. company company type = Security Detection and Prevention foundation = 1874, acquired by Tyco 1997 location = Boca Raton, Florida industry = Fire detection, Fire suppression, Security systems,… …
99Universal asynchronous receiver/transmitter — A universal asynchronous receiver/transmitter (usually abbreviated UART and pronEng|ˈjuːɑrt) is a type of asynchronous receiver/transmitter , a piece of computer hardware that translates data between parallel and serial forms. UARTs are commonly… …
100Drum and bugle corps (classic) — Classic drum and bugle corps are North American musical ensembles that descended from military bugle and drum units returning from World War I and succeeding wars.[1] Traditionally, drum and bugle corps served as signaling units as early as… …
