The AT&T telephone system, once the largest machine ever built, operated under the principle of "One Policy, One System, Universal Service." This centralized model contrasted sharply with the Internet's decentralized, interconnected nature. The telephone network, with its standardized interfaces and limited device variety, pushed complexity to the center, requiring extensive machinery in telephone offices.

In the early 1980s, telecommunications underwent a chaotic and messy reshaping. A pivotal shift occurred in how Customer Premises Equipment (CPE), specifically telephones, was viewed. Previously considered part of the Bell System, leased to users with a single monthly rate covering service, maintenance, and the phone itself, the concept began to change.

Factors like the maintenance intensity of early phones and the need for compatibility with central office equipment contributed to the phone company's responsibility for end-user devices. Complex wiring and the potential for a single faulty phone to impact an entire line reinforced the necessity of professional installation and the phone company's control over CPE. This era marked a significant transition for telephones, moving them from integral system components towards consumer electronics.