Frequencies-and-Repeaters

Squelsh

1	Simple Carrier squelch
2	Tone squelch and selective calling systems:
2.1		CTCSS (PL) - Continious Tone Coded Squelsh System (Private Line)
2.2		SelCall - Selective Calling 
2.3		DCS	- Digital Coded Squelsh
2.4		XTCSS   -Combination Signalling (CTCSS plus in band signaling)
wikipedia.org - Squelch

hamradioschool - Get Right Signal Tone

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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20182018 - pre published v0.9