2-tone paging

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Two-tone (2-tone) paging is a format of audio-based radio paging commonly used to activate voice pagers used by volunteer emergency services personnel. The format is based on a list of possible audio tones, which are transmitted in a series of two tones to activate the paging receivers.

External Links

Two-Tone Paging on WikiPedia
Midians Manufacturer of paging encoders, also provides a wonderfully detailed wall chart of paging formats.

Notice - this is a static HTML mirror of a previous MediaWiki installation. Pages are for historical reference only, and are greatly outdated (circa 2009).