UL-1637 Complete Document History
Standard for Home Health Care Signaling Equipment

Complete Current Edition:
   4TH EDITION - Standard for Home Health Care Signaling Equipment - Dec. 29, 2006
   CHANGE 06/09 - REVISION CHANGE - CODE D - June 11, 2009
   CHANGE 10/15 - REVISION CHANGE - CODE D - Oct. 26, 2015
   CHANGE 02/16 - REVISION CHANGE - CODE D - Feb. 25, 2016
   CHANGE 12/16 - REVISION CHANGE - CODE D - Dec. 9, 2016

Obsolete Revision Information:
   3RD EDITION - Standard for Home Health Care Signaling Equipment - Oct. 26, 1998
   2ND EDITION - Standard for Home Health Care Signaling Equipment - Jan. 1, 1989