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A telecommunications device for the deaf (TDD) is a teleprinter, an electronic device for text communication over a telephone line, that is designed for use by persons with hearing or speech difficulties. Other names for the device include teletypewriter (TTY), textphone (common in Europe), and minicom (United Kingdom).
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Sonic is a telecommunications company and internet service provider based in Santa Rosa, California, acting as a competitive local exchange carrier in the San Francisco Bay Area, Sacramento, and Los Angeles. [2] [3]
Time-division multiplexing (TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the transmission line so that each signal appears on the line only a fraction of time according to agreed rules, e.g. with each transmitter working in turn.
Originally GTC Telecom, GTC Wireless was founded in 1997 and changed its name in 2006. This follows their intent of shifting to being a Mobile Virtual Network Operator. [1] GTC Wireless was sold to Atrium Wireless Partners, LLC in November, 2007. They are an independent company and are no longer affiliated with GTC Telecom.
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Terahertz waves lie at the far end of the infrared band, just before the start of the microwave band. Terahertz radiation – also known as submillimeter radiation, terahertz waves, tremendously high frequency [1] (THF), T-rays, T-waves, T-light, T-lux or THz – consists of electromagnetic waves within the ITU-designated band of frequencies from 0.3 to 3 terahertz (THz), [2] although the ...
Passive optical networks were first proposed by British Telecommunications in 1987. [8]Two major standard groups, the Institute of Electrical and Electronics Engineers (IEEE) and the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T), develop standards along with a number of other industry organizations.