Monitoring the city of Sandy Springs Police Dispatch (alpha tag SSPD Disp) located in Fulton county. SSPD Dispatch uses the North Fulton Regional Radio System Authority (NFRRSA) which is a Project 25 Phase II system. Voice is broadcast using the APCO-25 Common Air Interface Exclusive system. Broadcast capture is obtained by an RTL2832U USB dongle connected to a Raspberry Pi 3.