IS-54 maintains compatibility with Advanced Mobile Phone System ( AMPS ) in many ways.
North American standards were Advanced Mobile Phone System ( AMPS ) and Narrow-band AMPS ( N-AMPS ).
The first analogue cellular system widely deployed in North America was the Advanced Mobile Phone System ( AMPS ).
The expansion order for Advanced Mobile Phone Systems, or AMPS, will boost the capacity of Brazilian networks supplied by Ericsson to more than 1.2 million.
The National Telecommunications Commission ( NTC ) has again deferred the scheduled auction of the right to operate an advanced mobile phone system in the country.
The expansion order for Advanced Mobile Phone Systems, or AMPS, will boost the capacity of Brazilian networks supplied by Ericsson to more than 1 . 2 million.
"' Celcom Axiata Berhad "', ETACS ( Extended Total Access Communication System ) specifications of the United Kingdom, a derivative of the US-AMPS ( Advanced Mobile Phone System ) technology.
LM Ericsson, the world's third largest mobile phone maker, said Friday it is getting out of the business of making phone handsets so it can concentrate on offering more advanced mobile phone systems.
There are seven cellular telecommunications suppliers in Indonesia, offering three different systems-- Advanced Mobile Phone System ( AMPS ), Nordic Mobile Telecommunications ( NMT ) and Global System for Mobile Communications ( GSM ).
While Motorola was developing a cellular phone, from 1968-1983 Bell Labs worked out a system called "'Advanced Mobile Phone System ( AMPS ) "', which became the first cellular network standard in the United States.