BS-EN-61643-21 Complete Document History
Assistive listening devices and systems for active assisted living

Complete Current Edition:
   2001/A2 EDITION - 2001 EDITION/AMENDMENT 2 INTERFILED - May 1, 2013

Obsolete Revision Information:
   2001 EDITION AMENDMENT 1 - AMENDMENT 1 FOR 2001 EDITION - Jan. 1, 2010
   2001 EDITION - REQUIREMENTS and TESTING METHODS - Aug. 31, 2001