Answer:
Simplex
Explanation:
Simplex is an example of a communication channel in telecoms that transmits signals in one direction. The signal that sends and the one that receives are usually on the same frequency. When you listen to your favorite radio station, signals from the radio station get to you, but at no one point will you ever send the signals back. The sender of the message (radio station), can only forward, and you on the hand (audience), will only receive. This is the best example of information transmitted in one direction
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Answer:
CENTREX systems reside at the service providers central office, and the operations and maintenance responsibilities belong to the service provider
Explanation:
CENTRal EXchange. Telephone company service that obviates the need of buying, maintaining, and upgrading a private branch exchange (PBX). Basically, Centrex service consists of ordinary trunk-lines to which several features are added by the phone company. While it is more economical than a PBX system, it often requires special telephone equipment for exploiting its features.
Based on the above definition, we can infer that CENTREX systems reside at the service providers central office, and the operations and maintenance responsibilities belong to the service provider is the correct option since features are usually added by the company.
