ERMES
European Radio Message System
Developed in 1990 by the European Telecommunications Standards Institute.
Strictly a European format with no known US implementations. It supports
alphanumeric, numeric and tone paging. ERMES operates at a constant
speed of 6250 bps and uses 4 level FSK signalling. This protocol uses a
dedicated frequency spectrum in the 169 MHz range and supports 16
adjacent channels. The pagers are designed such that each pager is
assigned to a specific time
slot and when the pager senses it is not in its 'home' system it begins
its roaming routine by scanning all channels.
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