Advanced Mobile Phone Service
Advanced Mobile Phone Service ( AMPS ) is the oldest mobile phone standard in the world.
The analog standard was developed in collaboration with Motorola over a period of ten years at Bell Laboratories in the United States and launched on October 13, 1983 in Chicago . The Bell Laboratories belonged equally to the companies Western Electric and AT&T at the time .
From 1988 AMPS was further developed by the Telecommunications Industry Association (TIA). AMPS belongs to the family of the first generation of cellular mobile communications. AMPS uses the FDMA ( Frequency Division Multiple Access ) access method . The high capacity and reliability of AMPS at the time of its introduction helped the standard to breakthrough and allowed American industry to export the system to many countries. AMPS uses the 800 MHz band. TACS and ETACS were derived from AMPS initially for European countries. TACS uses a different channel spacing and the 900 MHz band. Another descendant of AMPS was JTACS (the J stands for Japan). Further developments of AMPS led to NAMPS ( Narrowband Advanced Mobile Phone Service ), which allowed an even higher capacity.
The next step was D-AMPS as a digital extension, which also opened the PCS frequencies ( Personal Communication System ) in the USA in the 1900 MHz band (today PCS 1900). The development of AMPS has largely ended with D-AMPS. A further development to the EDGE standard, originally derived from the GSM , was not completed. After the AT&T successor AT&T Wireless decided in 2002 to convert the entire network from AMPS to GSM with GPRS , practically all of the existing AMPS network operators follow the example.
Other first-generation cellular standards were:
- NMT in Scandinavia, later Benelux, Austria and Eastern Europe
- C network in Germany, Portugal and South Africa
- RTMS in Italy.
Individual evidence
- ^ Cell phone industry celebrates its 25th birthday. In: cnet.com . October 12, 2008, accessed September 15, 2017 .
- ^ The "AMPS" Family of Wireless Standards. (No longer available online.) In: cnp-wireless.com, David Crowe. May 14, 2007, archived from the original on September 17, 2017 ; accessed on September 15, 2017 (English). Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
