The SAFEPATH Telephone Zone Controller (SP4-TZC) is designed to access individual or multiple speaker zones throughout the SAFEPATH4 Multi-Function Facility Communication System via the telephone. The SP4-TZC shall can support up to 17 SP4-APS speaker splitter modules and address all zones at once (“All Call”), a maximum of 68 separate zones, 17 fixed zone groups and 9 programmed logical zone groups. Also, the SP4-TZC can select zones for background music.