The OSDP 8 Port Hub provides a reliable and convenient star-home run wiring option for sites with Open Supervised Device Protocol (OSDP) support devices. The Gallagher OSDP 8 Port Hub allows up to eight OSDP devices to be locally consolidated on one RS485 port on the Gallagher Controller. One OSDP 8 Port Hub can be used per RS485 port on the Gallagher controller.