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Answer» What is Digital Electronic Message Service mean? The Digital Electronic Message Service (DEMS) is a two-way wireless radio servicefor passing of message and facsimile data using the 10.6 and 24 GHz band. As of 1997, Associated Communications was expected to use the band to create a network in 31 U.S. cities.In October 2005, the FCC moved part of the DEMS service from the 18/19 GHz band to 24 GHz. reference
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