call signaling
Call signaling is a process that is used to set up a connection in a telephone network. In VoIP systems, call signaling establishes connections between H.323 or SIP endpoints (or between an endpoint and a gatekeeper).
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- calling card
A telecommunication credit card used by consumers to pay for telephone and cellular services. Calling cards employ a prepaid credit system through the use of prepaid calling cards. If a card allows consumers to add funds to the card, it is a refillable card and will usually have permanent PIN. Other types of calling cards […]
- camcorder
An electronic device that contains both a video camera and recording device. They are generally a small portable device that can record live video and usually audio as well. Camcorders support playback of the captured video through consumer electronics such as a VCR, TV or computer. Contrast with digital camera which records still images.
- camera-ready
In desktop publishing, camera-ready refers to the final state of a publication before it is printed. Historically, the term has meant that the copy is ready to be photographed and turned into plates for offset printing. Increasingly, however, it is possible to print directly from the electronic version, either by sending it to a high-resolution […]
- candela
Abbreviated cd, the International System of Units standard unit of measurement of luminous intensity. The candela is equal to the luminous intensity in a given direction of a source that emits monochromatic radiation of frequency 540 x 1012 hertz and has a radiant intensity in that direction of 1/683 watt per unit solid angle The […]
- candy bar
A candy bar or candy bar mobile is a mobile phone form factor where the phone is a solid device with no moving parts except for the keypad buttons, and in some cases, the antenna. Because the candy bar style does not have anything covering the buttons these types of phones offer a key guard […]