This paper introduces current and planned mobile data and messaging capabilities of the TDMA Digital AMPS cellular and personal communications standard. In addition to providing more than a threefold capacity increase over the venerable analog AMPS standard by digital transcoding and time division multiplexing, D-AMPS provides a flexible and competitive technological platform capable of significant evolution. The introduction of a digital control channel (DCCH) to D-AMPS via the IS-136 standard increases battery life, adds support for hierarchical cell structures, improves private/public system discrimination, and strengthens support of new revenue generating wireless data and messaging services.
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