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.
Answer:
computer network
Explanation:
group of computers that are interconnected in order to share information or documents.
It's an example of a poorly written email, it looks like somebody is angry and yelling at you, these types of emails can be described as a poor etiquette.
