Definition - What does Bellhead mean?
A Bellhead an individual who prefers circuit-switching based networks over packet-switching based networks. Bellheads typically refer to engineers and managers who still stick to the practices established by the Bell Telephone Company and its many subsidiaries. Bellheads believe that the core of a computer's network should be based on circuit-switching architecture, which uses hardware to route and manage traffic over a network. This differs from packet switched networks, which rely on software.
Techopedia explains Bellhead
The opposite of a Bellhead is a Nethead. A Nethead sees telecommunications as a relic and digital computing as the wave of the future. As such, Netheads believe that software and flexible and adaptive routing are the way to go. These ideals are what allowed the Internet to grow and are incorporated into Internet Protocol. So, while Bellheads would favor the adoptions of systems based on asynchronous transfer mode (ATM) technology, Netheads believe in extending IP.