- 産業: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
A device that incorporates a compressor and an expander, each of which may be used independently.
Industry:Telecommunications
A device that interfaces concatenated E&M signal paths. Note 1: A PLR converts a ground, received from the E lead of one signal path, to -48 Vdc, which is applied to the M lead of the concatenated signal path. Note 2: In many commercial carrier systems, the channel bank cards or modules have a "PLR" option that permits the direct connection, i.e., concatenation, of E&M signaling paths, without the need for separate PLR equipment.
Industry:Telecommunications
A device that introduces a delay in the propagation of an electrical signal by (a) employing a transducer to convert the signal into an acoustic wave, (b) propagating the acoustic wave through a medium such as a column of mercury or a carbon or ferrite rod, and (c) by means of another transducer, converting the acoustic wave back to an electrical signal. Note: An acoustic delay line may be used for temporary storage of information, e.g., a digital data stream.
Industry:Telecommunications
A device that introduces data into or extracts data from a system.
Industry:Telecommunications
A device that is attached to interconnect the Go and Return paths of a circuit at the incoming end of a circuit on command to permit maintenance personnel to make a continuity check on a loop basis.
Industry:Telecommunications
A device that is capable of accepting digital or analog data and developing intelligible speech sounds that correspond to the input data, without resorting to recorded sounds or without simply being a speech scrambler operating in reverse.
Industry:Telecommunications
A device that is inserted between a primary power source, such as a commercial utility, and the primary power input of equipment to be protected, e.g., a computer system, for the purpose of eliminating the effects of transient anomalies or temporary outages. Note 1: An UPS consists of an inverter, usually electronic, that is powered by a battery that is kept trickle-charged by rectified ac from the incoming power line fed by the utility. In the event of an interruption, the battery takes over without the loss of even a fraction of a cycle in the ac output of the UPS. The battery also provides protection against transients. The duration of the longest outage for which protection is ensured depends on the battery capacity, and to a certain degree, on the rate at which the battery is drained. Note 2: An UPS should not be confused with a standby generator, which may not provide protection from a momentary power interruption, or which may result in a momentary power interruption when it is switched into service, whether manually or automatically.
Industry:Telecommunications
A device that is responsive to the presence or absence of a stimulus. 2. In an AM radio receiver, a circuit or device that recovers the signal of interest from the modulated wave. Note: In FM reception, a circuit called a discriminator is used to convert frequency variations to amplitude variations. 3. In an optical communications receiver, a device that converts the received optical signal to another form. Note: Currently, this conversion is from optical to electrical power; however, optical-to-optical techniques are under development.
Industry:Telecommunications
A device that is used primarily for the detection and location of underwater objects by reflecting acoustic waves from them, or by the interception of acoustic waves from an underwater, surface, or above-surface acoustic source. Note: Sonar operates with acoustic waves in the same way that radar and radio direction-finding equipment operate with electromagnetic waves, including use of the Doppler effect, radial component of velocity measurement, and triangulation.
Industry:Telecommunications
A device that is used to interconnect the Go and Return paths of a circuit at the incoming end, and through which the detection of an incoming check tone transmits another check tone to permit a continuity checking of a 2-wire circuit. Synonym smart jack.
Industry:Telecommunications
