в нынешнем apcupsd-3.14.3 (red hat linux)
        UPSCLASS shareslave
        UPSMODE share
и всеравно теперь не работает простая MASTER/SLAVE технология.

  * Unreliable MASTER/SLAVE networking mode is removed
  
       Yes, this is a feature. The old MASTER/SLAVE mode for shutting down multiple servers from one UPS has historically been unreliable and prone to loss of communications or lockups. Apcupsd has long had a replacement networking mode using the NIS server (NIS stands for Network Information Server, and has nothing to do with Sun's NIS/YP protocol). The NIS net mode is very reliable and has none of the lockup bugs that have plagued  MASTER/SLAVE mode.
       In 3.14.x, MASTER/SLAVE mode has been removed and the associated configuration directives are now obsolete. Please see the Apcupsd manual

http://sourceforge.net/project/shownotes.php?group_id=54413&...