customer premises equipment (CPE)Terminal and associated equipment and inside wiring located at a subscriber's premises and connected with a carrier's communication channel(s) at the…
customer premises wireThe segment of wiring from the customer's side of the protector to the customer premises equipment. [47 CFR Pt.36-A]
customer service unit (CSU)A device that provides an accessing arrangement at a user location to either switched or point-to-point, data-conditioned circuits at a specifically…
cutback techniqueA destructive technique for determining certain optical fiber transmission characteristics, such as attenuation and bandwidth, by (a) performing the…
cutoff attenuatorA waveguide, of adjustable length, which varies the attenuation of signals passing through it.
cutoff frequencyThe frequency either above which or below which the output of a circuit, such as a line, amplifier, or filter, is reduced to a specified level. 2.
cutoff modeThe highest order mode that will propagate in a given waveguide at a given frequency.
cutoff wavelengthThe wavelength corresponding to the cutoff frequency. 2. In an uncabled single-mode optical fiber, the wavelength greater than which a particular…
cutoverThe physical changing of circuits or lines from one configuration to another.
CVSDAbbreviation for continuously variable slope delta modulation.
cyberLoosely, a prefix referring to anything related to computers or networking. Note 1: For example, a "cyber cafe" is a coffee shop that offers computer…
cybercommunity1. The aggregate of participants in the use of a portion of cyberspace. 2. A special-interest group (SIG) of cyberspace participants.
cybermallAn electronic site shared by a number of commercial interests, and at which users can browse, shop, and place orders for the products listed at that site.
cybernaut1. One who uses the Internet. 2. Synonym Web surfer.
CyberspaceAn environment in which digitized information is distributed on networks of computers.
CybersquattingRegistering domains related to other trademarks or brands in an attempt to cash in on the value created by said trademark or brand.
cyclic distortionIn telegraphy, distortion that (a) is periodic and (b) is not characteristic, not biased, and not fortuitous.
cyclic redundancy check (CRC)An error-checking technique that helps ensure accurate transmission of digital data in a network.