Talk:Frequency-change signaling
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This appears to be a specialist term for frequency modulation when used in analog supervisory signaling. (See note 2 in the article body).
This is arguably rapidly becoming a historical term.
- There is no note 2 in the article body. I think Frequency-shift keying is a closer synonym. But it's pretty archaic, appearing pretty much nowhere except in dictionaries and glossaries. Probably not worth an article. Dicklyon (talk) 03:56, 29 August 2013 (UTC)