Not talking about the digtal coded squelch "dcs/dpl" type operation... each manufacture has/had their own cute label for ctcss "tone" operation.
"Quiet Tone, Quiet Channel, Channel Guard, Tone Guard, Private Line (PL), CTCSS" and depending on how far back you go some other cute names/labels used by current and now long-gone radio companies. Not to mention some companies offered more than the standard number or "table" of available ctcss frequencies. cheers, s. > "JOHN MACKEY" <[EMAIL PROTECTED]> wrote: > I always thought it was known as "QC" for Quiet Channel > or "CG" for Channel Guard. > > > From: [EMAIL PROTECTED] > > I guess it is time again for a bit of clarification for the > > apparent newbies: > > > > PL ... is a registered trademark of Motorola Inc. properly > > known as Private Line. > > > > A very polite way of saying the same thing here is > > Continuous Tone Coded Squelch System or CTCSS.
