Wis. Admin. Code § DHS 83.49
(2) General requirements. Small class CA, small class CS and small class CNA facilities constructed and licensed before April 1, 2009, are exempt from the sprinkler system requirement under s. DHS 83.48 (8) if all of the following requirements are met:
(e) The smoke detection system has a backup battery power supply and is externally monitored so activation of the system automatically results in notification of the local fire department. Tape or voice type dialers are prohibited. Acceptable configurations for external monitoring are limited to any of the following:
History: CR 07-095: cr. Register January 2009 No. 637, eff. 4-1-09.