My impression is that the term PL was used in the early days when repeaters
became extremely populous and tone access was developed to minimize
interference among and between repeaters on the same frequencies, and also,
in some cases, tone access was even used to lock out people, e.g. some clubs
locked out non-members from accessing their private repeaters. At some
point, the term PL seems to have been replaced with CTCSS. Now, when I read
the descriptions for the many different transceivers, I am seeing the term
CTCSS, rather than PL. While the majority of repeaters have tone access,
some do not. Regardless, they are simply two terms for the same function;
that is tone access. 

Ron, K8HSY
  


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Dave Marthouse
Sent: Thursday, December 25, 2014 8:56 AM
To: [log in to unmask]
Subject: Re: question

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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