Market Description
PCS-TAG-4 (IS-136 TDMA)
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US PCS is the label given to the digital Personal Communications standard for North America. Frequency allocations have been assigned by the FCC in the 1900 MHz range, and most have been auctioned to specific service providers, with a small band reserved for unlicensed use. To date there are seven different major standards (PCS-TAG-1 through PCS-TAG-7) proposed for US PCS use.
PCS-TAG-4 is described in IS-136, and is a TDMA based system similar to the 900 MHz IS-54 NADC cellular system. Promoted heavily by Ericsson, it is also sometimes referred to as D-AMPS (Digital AMPS).
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