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traditional method of communication was by line signals, but this has been superseded by voice communication, and line signals are now used in emergencies when...

Line level is the specified strength of an audio signal used to transmit analog sound between audio components such as CD and DVD players, television...

multiple subject fields including signal processing, information theory and biology. In signal processing, a signal is a function that conveys information...

Line signaling is a class of telecommunications signaling protocols. Line signaling is responsible for off-hook, ringing signal, answer, ground start...

debate. E and M signaling (E&M) is an out-of-band channel-associated signaling system. The base system is intended for line signaling, but if decadic...

all of the A Division, but with the conversion of the IRT Dyre Avenue Line signals to the B Division scheme in September 2017, this system is no longer...

signal Listen to a busy signal from North America, Hong Kong, and South Korea. Example of an old North American busy signal Listen to a busy signal from...

Red Line Signal Repairs". Massachusetts Bay Transportation Authority. June 21, 2019. Stout, Matt; Siu, Diamond Naga (June 21, 2019). "T says Red Line reduced...

attempting to communicate via radio signals might do so using a frequency of 1420 megahertz (21-centimeter spectral line), which is naturally emitted by hydrogen...

using line-side signalling; if the train runs any faster, it will not be possible for the train driver to safely read colour-light signalling. Trains...

starting from the Red Line commuter project and recent double tracking projects. However, in most rural areas, single track semaphore signals are still in use...

A digital signal is a signal that represents data as a sequence of discrete values; at any given time it can only take on, at most, one of a finite number...

as "TX") is the process of sending or propagating an analog or digital signal via a medium that is wired, wireless, or fiber-optic. Transmission system...

Railway signalling (BE), or railroad signaling (AE), is a system used to control the movement of railway traffic. Trains move on fixed rails, making them...

Differential signalling does not make a line balanced, nor does noise rejection in balanced circuits require differential signalling. Differential signalling is...

Line south of Church Avenue, which operated as part of the BMT until 1954, now carries only the F, a former IND service, and is chained and signaled as...

indicate who controls that signal and that stretch of the line. For more information, see also Interlocking. The earliest signal boxes housed mechanical...

System No. 2. R2 signaling methods may be logically divided into two protocol groups. The line signaling group comprises supervisory signals for call setup...

synchronous digital circuits, a clock signal (historically also known as logic beat) is an electronic logic signal (voltage or current) which oscillates...

electricity or control signals, but also high-speed data and multimedia, is now under investigation.[by whom?] A wide range of power-line communication technologies...