Duplex Transmission - This is the capability for simultaneous data transmission between a sending and receiving station. Dual Tone Multi-Frequency (DTMF) - This is when two tones are used to represent...
Delay - This is the wait time between to specific events, and regarding satellite communications, it is the time it takes for a signal to go from the transmission station up to orbit and through the s...
DAMA - Stands for Demand-Assigned Multiple Access. This is a way to instantaneously assign telephony channels in a transponder according to the immediate traffic demands. Dash - This is the the charac...
CPU central processing unit Cross Connect 1.in a premises distribution system, equipment used to terminate and administer communications circuits. In a wire cross connect, jumper wires or patch cords...
Codec Codec is a contraction of coder and decoder; a device that encodes analog signals into digital signals, for transmission through a network in digital format, and decodes received digital signals...
Channel A channel is a single communications path in a transmission medium connecting two or more points in a network, each path being separated by some means; e.g., spatial or multiplex separation, s...
补充： CBR continuous bit rate CCIS common-channel interoffice signaling CCITT CCITT is the International Consultative Committee for Telephone and Telegraph, a consultative committee to the Interna...
补充： Client - A program or computer that is used to contact and obtain data from another program or computer, referred to as the server. CLEC - Competitive Local Exchange Carrier. Deregulated loc...
Compatible - When one object can be used interchangeably with another. Composite Baseband - The unclamped and unfiltered output of the satellite receiver's demodulator circuit. It contains all of the...
City Code - Some foreign countries require you to dial a city code before the phone number you are trying to reach. Clamp - A circuit that removes the energy dispersal signal component from the video...
Cassegrain Antenna - An antenna that places a subreflector at the focal point to reflect energy to or from a feed located at the apex of the main reflector. CB - This stands for Citizen's Band and is...
Cache - Generally, a place to temporarily store something. Regarding computers and telecommunications, it is a place where data is temporarily stored during transmission. Call - This is a connection b...
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补充： Backbone - A series of high-speed network connections through which other networks connect. Bandwidth - According to Webster's: a range within a band of wavelengths, frequencies, or energies...
Bit - This is a contraction of the term Binary digIT, and it is a number in base 2, which means that it can only be a 0 or a 1. Bit Error Rate - The rate of message bits that are in error (an error ra...
