[aprssig] Re: PL 100

Dennis Hudson, N2LBT n2lbt at n2lbt.com
Sun Jul 18 20:32:10 EDT 2004

Making sense has nothing to do with the facts. It's all the same no 
matter what you call it, CG, QT, CTCSS, PL. Let's just drop it already. 
This has nothing to do with APRS.

On Jul 18, 2004, at 5:16 PM, KC2MMi wrote:

> I don't see the Motorola trademark being a difference. If the mark is 
> still
> in effect, then only a product made or licensed by Motorola would be 
> allowed
> to use it. So, is every radio manufacturer that claims to be using PL 
> tones
> paying Motorola for the use of the term, when they could just say 
> "selective
> tones" and not pay the license fee?
> And even that doesn't explain why the whole industry uses the term PL 
> for tx
> only, and CTCSS for rx only. If I'm transmitting a PL tone, someone 
> else
> needs to be receiving a PL tone to use it. But the industry says they
> receive CTCSS...meaning PL. Or vice versa.
> Makes no sense at all, trademark usage or otherwise.

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