Communications Circuit

Communications Circuit


(Russian trakt sviazi), a complex of equipment and communication lines designed to establish specialized channels for the transmission of information. Communications circuits are characterized by specific, standard criteria, such as the frequency bandwidth and information transmission rate.

In Russian the concept of a communications circuit is often used in describing multichannel communications systems. For example, in multichannel systems with frequency-division multiplexing, standard voice-frequency channels are combined by means of carrier terminal equipment into standard 12-channel groups that occupy a standard frequency band of 60–108 kilo-hertz (the primary group circuit). The standard secondary group of channels occupies the frequency band 312–552 kilohertz (the secondary group circuit) and is formed by combining five standard primary groups. Additional groups of channels are formed in the same way. The set of all channel groups in a multichannel system constitutes a group, or multichannel, communications circuit, which may be characterized by the system’s total frequency bandwidth.

The standard criterion used for data-transmission systems is the information transmission rate. Data-transmission circuits are classified as low-speed (50 to 200–300 bits/sec), medium-speed (600–10,000 bits/sec), and high-speed (48,000 bits/sec and higher) circuits. A data-transmission circuit consists of several standard channels, data-transmission equipment, including such signal-conversion equipment as modulators and demodulators (modems), channel-monitoring equipment, and error-protection equipment. In addition to their use in multichannel communication and data transmission, standard communications circuits are also found in television, audio-broadcasting, broadband, and video-telephone communications.

In Russian the concept of a communications circuit is sometimes used in a narrower sense to designate the antenna/waveguide channel of a radio-relay link, a group channel in pulse-code modulation equipment, or the linear channel of multiplexing systems.


Mnogokanal’naia sviaz’. Edited by I. A. Abolits. Moscow, 1971.
Shvartsman, V. O., and D. G. Mikhalev. Raschet nadezhnostnykh kharakleristik traktovperedachi dannykh. Moscow, 1975.


References in periodicals archive ?
The antennaes at each end of the communications circuit are combined to minimise errors and optimise data speed.
The antennas at each end of the communications circuit are combined to minimise errors and optimise data speed.
has introduced new Datacom and Diphase test features for its T-BERD/MTS-6000A Multi-Services Application Module (MSAM) for faster data communications circuit installment and troubleshooting.
In order for blade servers to achieve superior performance, technologies to enable the backplane - which is a communications circuit board connecting multiple server blades - to achieve high-speed transmissions of 10Gbps, and technologies to accelerate those transmissions through multiple channels are being developed.
A key benefit of Astrolink is dynamic bandwidth allocation, which allows customers to purchase as much or as little satellite throughput capacity as they require at a given time, instead of paying for a dedicated communications circuit.
The system operates in full duplex and combines high quality digital sound and image information that can be transmitted over communications circuit with a carrying capacity of only 128,000 bits of data per second.
He holds 46 patents in programmable architectures and wireless communications circuit design.
One of challenge of managing critical communications circuit has always been that service interruptions, service degradation or connection maintenance required on-site support," said David Weiss, CEO of Dataprobe.
this request for proposal will solicit responses from qualified service providers for various communications circuits and optional dark fiber segments across california.
This sets requirements for developers of components such as micro-displays, batteries and supercapacitors and wireless communications circuits to name a few, as they need to feature low power requirements, flexibility in integration and form factor, and even transparency in some I cases.
The NCTAMS LANT tech control division terminates and troubleshoots RF communications circuits, including but not limited to those used for IP services.
Featuring digital circuitry, the new transceiver chip can automatically optimize itself for a variety of high-speed communications circuits, thus significantly reducing development periods by approximately halfcompared with conventional methods.

Full browser ?