Glossary:

ATIS Telecom Glossary

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Select a term name to open its entry and any media references. Longer definitions end with a “Read More” link.

client-server architecture

Any network-based software system that uses client software to request a specific service, and corresponding server software to provide the service from another computer on the network.

cliff effect

In the digital transmission of analog signals, including analog television and digital audio broadcasting (DAB), a signal-quality effect in which the decoded analog signal is either essentially flawless or totally unusable; i.e., it exhibits no gradual degradation or improvement attributable to the presence or absence of transient phenomena such as amplitude variations that may occur during transmission.
Note: The cliff… (Read More →)

clip

1. In moving picture or television technology, a relatively short, continuous set of frames (often including the associated audio, if any), stored on a recording medium. Synonyms take, scene.
2. In audio, a short, uninterrupted sound track.
Note: Both audio and video clips may be part of a digitized information package, e.g., on a Web page.
3. To limit to… (Read More →)

clipper

1. A circuit or device that limits the instantaneous output signal amplitude to a predetermined maximum value, regardless of the amplitude of the input signal.
2. A chip developed by the United States Government that was to be used as the standard chip in all encrypted communications. Aside from the fact that all details of how the Clipper chip work… (Read More →)

clipping

1. In telephony, the loss of the initial or final parts of a word, words, or syllable, usually caused by the nonideal operation of voice-actuated devices.
2. The limiting of instantaneous signal amplitudes to a predetermined maximum value.
3. In a display device, the removal of those parts of display elements that lie outside of a given boundary.

CLLI� Code

See Location Code (CLLI™ Code). A Common Language Location Identifier (CLLI™) Code is a a standardized eleven-character code that identifies the geographic location and identifies switches, points of interconnection, and other functional categories of telephony network elements.

(CLLI™ is a registered trademark of iconectiv, llc. iconectiv is a registered trademark of iconectiv, llc. )

clock

1. A reference source of timing information.
2. A device providing signals used in a transmission system to control the timing of certain functions such as the duration of signal elements or the sampling rate.
3. A device that generates periodic, accurately spaced signals used for such purposes as timing, regulation of the operations of a processor, or generation of… (Read More →)

clock accuracy

The level of agreement of the frequency of a clock with the ideal frequency. This is specified as the magnitude of the fractional frequency offset from the ideal frequency. [T1.10
5. 09-1996]

clock error

The difference between local clock time or value and a designated reference clock time or value.
Note: Subtracting the clock difference from the local clock brings the local clock into agreement with the reference clock.

clock fast mode

An operating condition of a clock in which it is locked to an external reference and is using time constants that are altered to quickly bring the local oscillator's frequency into approximate agreement with the synchronization reference frequency. [T1.101-1987]

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