AMPS

Dear student,

AMPS was a first-generation cellular  technology that uses separate frequencies, or "channels", for each conversation. It therefore required considerable bandwidth for a large number of users. 

What really separated AMPS from older systems is the "back end" call setup functionality. In AMPS, the cell centers could flexibly assign channels to handsets based on signal strength, allowing the same frequency to be re-used in various locations without interference. This allowed a larger number of phones to be supported over a geographical area. AMPS pioneers fathered the term "cellular" because of its use of small hexagonal "cells" within a system