28 01 10
Operation and Maintenance of Access Control
28 01 00
Operation and Maintenance of Electronic Safety and Security
27 53 19
Internal Cellular, Paging, and Antenna Systems
27 53 16
Infrared and Radio Frequency Tracking Systems
27 53 13.13
Wireless Clock Systems
27 53 13
Clock Systems
27 53 00
Distributed Systems
27 52 23
Nurse Call/Code Blue Systems
27 52 19
Healthcare Imaging Systems
27 52 16
Telemedicine Systems
27 52 13
Patient Monitoring and Telemetry Systems
27 52 00
Healthcare Communications and Monitoring Systems
27 51 29.13
Rescue Assistance Signal Systems
27 51 29
Emergency Communications Systems
27 51 26
Assistive Listening Systems
27 51 23.70
Healthcare Intercommunications and Program Systems
27 51 23.63
Detention Intercommunications and Program Systems
27 51 23.50
Educational Intercommunications and Program Systems
27 51 23.30
Residential Intercommunications and Program Systems
27 51 23.20
Commercial Intercommunications and Program Systems