What is AMPS (Advanced Mobile Phone Service)? What is digital?
Cellular Systems using AMPS technology was originally deployed in the 1980’s and 1990’s. AMPS has worked fine for alarm systems. As cellular communications became more popular, many cellular carriers wanted more capacity and started using digital technology. Digital cellular signaling was developed to add capacity and additional features. Several major carriers have recently announced that their analog systems will be going out of service.