[GreenKeys] Modem with 20mA current loop interface

[drlegendre .]

What other 20mA 'levels' exist, and what differentiates them?

Would the 12V / 470-600R loop used with many simple level converters be
considered low-level 20mA?

On Mon, Dec 15, 2014 at 10:38 AM, Jim Haynes <jhhaynes at earthlink.net> wrote:
>
> That would be 20ma at low level, suitable for Model 33/35 equipment.
>
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