The UPS Howto The UPS Howto Harvey J. Stein, [e-mail], Berger Financial Research, Ltd.v2.42, 18 November 1997This document will help you connect an uninterruptable power supply to a Linux box... if you're lucky... Copyright (c) 1994, 1995, 1996, 1997 by Harvey J. Stein. You may use this document as you see fit, as long as it remains intact. In particular, this notice (along with the contributions below) must remain untouched.1. Introduction1.1 Contributors1.2 Important disclaimer1.3 Other documents2. Important note on obsolete information3. Smart and dumb UPSs.4. Software5. Do it yourself guide5.1 What you need to do (summary)5.2 How it's supposed to work5.3 How to set things up5.4 User Enhancements6. Hardware notes6.1 How to make a cable6.2 Reverse-engineering cables and hacking powerd.c6.3 Serial port pin assignments6.4 Ioctl to RS232 correspondence7. What to do when you're really stuck8. Info on selected UPSs8.1 General Experiences.8.2 Advice 1200 A8.3 Trust Energy Protector 400/6508.4 Trust UPS 400-A8.5 Sustainer S-40a8.6 Systel8.7 Deltec Power, Fiskars Power Systems and Exide.8.8 Beaver model UB500 UPS8.9 Sendom8.10 Best8.11 GPS1000 from ACCODATA8.12 TrippLite BC750LAN (Standby UPS)8.13 APC9. How to shutdown other machines on the same UPS S