The 6820 is a address fire alarm control panel (FACP) that can be configured to achieve a point capacity of 1110 points and connect up to 17 panels in a single communication link. It has a built-in signaling line circuit (SLC), which can support 159 System Sensor® (SK) sensors and 159 SK modules or 127 Hochiki® (SD) devices per loop. To increase point capacity, SLC loops can be added using th e6815 SLC expander for SK devices or th e5815LX expander for SD devices, increasing point capacity to a maximum of 1110 points for SK devices and 635 points for SD devices. It also has a built-in, dual-line POTS and IP communicator with additional cellular options available. The 6820 is SWIFT® wireless compatible.