A common way to refer to a central monitoring station that has demonstrated the ability to provide monitoring service that complies with ul’s strict standards. ul requirements cover building structure, receiving and monitoring equipment, staffing issues, as well as installation and ongoing service. in order to be able to provide ul complying service, the building, equipment and staffing requirements have to be met at all times. however, the handling of specific signals from specific alarm systems is only audited by ul if a certificate is in effect for that alarm system.
