[Nut-upsdev] CyberPower CP550SL - I figured it out!

[orangevixen]

Yay, I got the serial cable that they sent me in the mail today and it 
DOES work!!

This new serial cable is a straight-through DB9 serial cable, the one 
that I had from my old UPS was NOT a straight-through DB9 (even though 
it says it is on the connector heads).

The settings in the genericupsups.8 manual page does work for the 
Cyberpower CP550SL. The OL status switches to OB when I pull the plug.

The only down side? the new serial cable that they gave me is so short 
it does not reach from the computer to the floor. So now I have to go 
get a longer straight-through serial cable. :/

-Tara