The modem office requires voice for conversational purposes, data for information retrieval, and video for teleconferencing. In increasing numbers, voice, data, and video channels are being used by the same customer. Separate facilities to switch and distribute each type of message can be expensive, and may not be necessary. With the pervasive application of digital technology comes the possibility of integrating much of the switching and distribution system, thereby saving facility space and expense, making coordination of services simpler, and providing synergistic combinations leading to enhanced service opportunities. A result of this sort of integration is the need to replace familiar terms such as telephony—which implies a star-connected voice network—with others such as point-to-point, point-to-multipoint, and broadcast (one-to-many) facilities, which describe the connection and do not preclude the use of combinations of different bit-rate (and bandwidth) channels.
KeywordsLocal Area Network Telecommunication Service Channel Switch Data Encryption Standard Television Receiver
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