[GreenKeys] TTY Loop Supply

[Chris Elmquist]

On Sunday (04/27/2014 at 11:29AM -0500), Jack Hart wrote:
> For those of you who are "loop supply challenged"...
> 
>  
> 
> see Ebay  171309209986

Interesting.  I note the "TIP NEGATIVE" notice on the front panel.
Was that any sort of convention or was the rule that you just had to
state what the polarity is?

I guess I'm familiar with other wiring where tip was positive...

Chris N0JCF

-- 
Chris Elmquist