The 6820U is the latest intelligent addressable FACP (Fire Alarm Control Panels) from Silent Knight and is a direct replacement for the 6820/5820XL FACP. The FACP has one built-in SLC (signaling line circuit), which can support 159 System Sensor SK detectors and 159 SK modules, or 127 Hochiki SD protocol devices. Additional SLC loops can be added for a maximum of 1110 (SK) or 635 (SD) points per panel. The built-in digital alarm communicator/transmitter (DACT) is dual technology, IP and POTS. The POTS transmits system status (alarms, troubles, AC loss, etc.) to a Central Station via the public switched telephone network. The IP communicator’s internet monitoring capability sends alarm signals over the Internet saving the monthly cost of two dedicated business telephone lines. Although not required, the secondary telephone line may be retained providing backup communication over the public switched telephone line. Optional cellular reporting is available.