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Talk-back circuit
| Telecommunications Glossary |
An audio return link from a receive location to the originating video/audio point. the equipment used is generally either a leased telephone line, dedicated radio link, or special microwave equipment made for this service.
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Circuit, английский
- An arrangement of conductors and electrical apparatus connected to a source of electricity supply (see also open circuit).
- The path of electrical flow from a power source through an outlet and back to ground.
- Цепь; схема
- Means of two-way communication between two or more points. 1. in communication systems, an electronic, electrical, or electromagnetic path between two or more points capable of providing a number of channels. 2. electric or electronic part. 3. optical or electrical component that serves a specific function or functions.
- Originally a physical connection that transmits electricity or signals. now also a communication channel that guarantees a fixed transmission capacity.
- Схема
- Round trip,
- Path followed by an electrical current.
- A set of components that form a circular path or route for fluid flow, e.g., to make open-loop geothermal circuits and closed-loop geothermal circuits.
Circuit, английский
Circuit, английский
Circuit, английский
Circuit, латинский
Circuit (specific function), английский
Circuit access points, английский
Circuit algebra, английский
Алгебра схем; схемная алгебра
Circuit analysis, английский
Схемный анализ
Circuit array, английский
Матрица схем; схемная матрица
Circuit binding; divinity binding; divinity stile, английский
Circuit board, английский
Монтажная плата
Circuit breaker, английский
- A switch suitable for opening a circuit automatically as a result of predetermined conditions, such as those of overcurrent or undervoltage or by some form of external control.
- A device which looks like a switch and is usually located inside the electrical breaker panel or circuit breaker box. it is designed to (1) shut of the power to portions or all of the house and (2) to limit the amount of power flowing through a circuit (m
- Автомат защиты сети
- An electric device for opening and closing a circuit, designed to open the circuit automatically upon flow of a predetermined value of abnormally high current; may be repeatedly reclosed and reused as an automatic overcurrent protection device without replacement of any components.
- Автоматический предохранитель; прерыватель цепи; автоматический прерыватель тока; пакетный переключатель
- Adevice used to interrupt an electrical circuit when current flow exceeds a predetermined level.
- An electrical device used to interrupt an electrical supply in the event of excess current flow. can be either magnetically or thermally activated, or a combination of both. can be manually or automatically reset.
- Device for interrupting an electrical circuit when the current exceeds a predetermined value. the device can be reset after the circuit malfunction has been corrected,
Circuit breaker closing, английский
Circuit breaker neutral pole, английский
Circuit breaker openinig, английский
Circuit breaker position data, английский
Circuit breaker unit, английский
Cbu
Circuit breaker., английский
Circuit breakers, английский
Measures instituted by exchanges to stop trading temporarily when the market has fallen by a certain percentage in a specified period. they are intended to prevent a market free fall by permitting buy and sell orders to rebalance.
Circuit capacity, английский
Нагрузочная способность схемы; логическая нагрузочная характеристика схемы
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Tbc - time base corrector, английский
An electronic accessory to a videotape recorder that helps make mixed format playback or transfers electronically stable. it helps maintain picture quality even in dubbing operations within a single tape format. glossary/84
Sysop - a system operator, английский
Somebody who runs a bulletin board system or network; responsible for keeping the network or bbs working properly. glossary/83 t t1 (ds-1) channel high-speed digital data channel/carrier with a bit rate of 1.544 mbps which requires a bandwidth of approximately 2.1616 mhz to transmit in a television type cable environment. (1.4 x 1.544 = 2.1616); a general term for a digital carrier (ds-1. available for high-volume voice or data traffic; often used for compressed video teleconferencing networks. each t1 circuit can accommodate 24 voice channels. a video codec operating at the t1 rate uses the equivalent of 24 voice channels. a codec operating at 56 or 64 kbps is operating in the range of one voice channel. a standard video signal digitized at 90 mbps has approximately 1400 voice channels. the compressed video signal quality and the cost decreases as the transmission speed decreases. t.129 series standards the t.120 standard contains a series of communication and application protocols and services that provide support for real-time, multipoint data communications. these multipoint facilities are important building blocks for a range of collaborative applications, including desktop data conferencing, multi-user applications, and multi-player gaming. through it data is seamlessly delivered to multiple parties in realtime. it allows endpoint applications from multiple vendors to interoperate. it specifies how applications may interoperate with (or through) a variety of network bridging products and services that support the t.120 standard. it is completely free from any platform dependencies including os/2, mac/os, several versions of unix, and other proprietary real-time operating systems. the t.120 standard supports a broad range of transport options, including the public switched telephone networks (pstn or pots), integrated switched digital networks (isdn), packet switched digital networks (psdn), circuit switched digital networks (csdn), and popular local area network protocols (such as tcp/ip and ipx via reference protocol). these network transports operate at different speeds, but can easily co-exist in the same multipoint conference. t.120 was designed to work alone or with in the larger context of other itu standards such as the h.321x family of video conferencing standards and v.series modems. t3 (ds-3. a carrier of 45 mbps bandwidth; one t3 channel can carry 28 t1 channels. used for point-to-point digital video transmissions or for major pbx-pbx interconnection. dedicated service delivered via fiber. the price for a t3 circuit can be comparable to seven to 12 t1 circuits. in addition to being offered by the traditional local and interexchange carriers, a number of alternative access carriers offer t3 circuits in major metropolitan areas.
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