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In telecommunications, a voice operated switch, also known as VOX or voice-operated exchange, is a switch that operates when sound over a certain threshold is detected. [1] It is usually used to turn on a transmitter or recorder when someone speaks and turn it off when they stop speaking.
Sound-powered telephones are widely used on ships. A typical example on a U.S. Navy ship is the "JL" circuit which is used by the lookouts to report visual contacts to the pilot house and the Combat Information Center (CIC). In this case there would be five stations on the circuit (stern lookout, port lookout, starboard lookout, pilot house and ...
The active state (i.e., a closed loop (short circuit between the wires) of a subscriber line or PBX user loop) An operating state of a communications link in which data transmission is enabled either for (a) voice or data communications or (b) network signaling. [2] [3]
Voice-operated switch (VOX) circuitry is designed to be normally activated by human voice audio picked up by the transceiver microphone during voice communications in order to effect antenna change over at a rate no faster than the typical human voice syllabic rate or slower. VOX circuitry usually has a front panel adjustable delay that can be ...
Circuit switching is a method of implementing a telecommunications network in which two ... While circuit switching is commonly used for connecting voice circuits ...
EMS-1 (The ITEC Electronic Modular Switch is an electronic direct control switching system. The modules are combined to form a complete switch or any of the modules can be added to your present Step-by-Step Systems.) EMS-2 (The EMS-2 RURAL SWITCH is a stored program control analog switch designed to be cost-effective in small exchanges.
In telecommunications, an electronic switching system (ESS) is a telephone switch that uses solid-state electronics, such as digital electronics and computerized common control, to interconnect telephone circuits for the purpose of establishing telephone calls.
The signaling unit and trunk circuit communicate their status over the E and M leads, using a combination of battery and earth (also known as ground) levels. The battery signal level used in the standard is nominally −48 VDC. All E&M installations require that the positive terminal of the battery is connected to a reliable shared earth circuit.