CTCSS is standard nomenclature for sub audible tones while PL is the 
name Motorola calls CTCSS.  In the Motorola world PL is known as private 
line.  I hope this helps.

Dave Marthouse N2AAM
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On 12/25/2014 9:41 AM, David Pearson wrote:
> Hi all:
>
> I often hear the terms pl/ctcss used as they're separat entities.  Aren't
> they just interchangeable terms for the same thing(distinctions without a
> difference)?
>
> Happy Chrimble, and thanks for any clarification.
>
> 73,
>
>
>
> David S. Pearson-wa4dsp
>
>
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Dave Marthouse
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