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The AMPS family of wireless standards were intended
to be just another analog radio-telephone standard (e.g. Advanced Mobile Phone Service
followed IMTS; Improved Mobile Telephone Service). However, due to the high capacity
allowed by the cellular concept, the lower power enabling portable operation and the
robust design of AMPS by AT&T, AMPS has been a stunning success. Today, more than half
the cellular phones in the world operate according to AMPS standards, which, since 1988,
have been maintained and developed by the Telecommunications Industry Association (TIA).
From its humble beginnings, AMPS has grown to accommodate TDMA and CDMA digital
technology, narrowband analog operation (NAMPS), in-building and residential
modifications. Most recently, operation in the 1800-2000 MHz |