Digital Advanced Mobile Phone Service

Digital-Advanced Mobile Phone Service (D-AMPS or '''DAMPS) is a digital version of Advanced Mobile Phone Service (AMPS) &mdash; the original analog standard for cell phone service in the United States. D-AMPS uses frequency ranges within the 800 and 900 Megahertz (MHz) electromagnetic radiation spectrum.

D-AMPS adds time division multiple access (TDMA) to AMPS to get three channels for each AMPS channel, tripling the number of calls that can be handled on a channel. D-AMPS is Interim Standard-136 from the Electronics Industries Assocation/Telecommunication Industries Assocation (EIA/TIA).