RS232 Voltage Levels

Bob Stephens wrote:
>
... big snip ...
> 
> Nope. The ASR-33 was 20 mA current loop - not RS232.

It was switchable between 20 and 60 mA via an internal terminal 
block.  Nobody used 60 on computers.

-- 
"If you want to post a followup via groups.google.com, don't use
  the broken "Reply" link at the bottom of the article.  Click on
  "show options" at the top of the article, then click on the
  "Reply" at the bottom of the article headers." - Keith Thompson
More details at: <http://cfaj.freeshell.org/google/>