The VPSI-1 device is designed to allow third party microphones and LED indicators to interface as slave devices to the Vocia standard and emergency Wall Station and standard Desk Station (WS-4/10, EWS-4/10 and DS-4/10) series microphones and to the Vocia Input 6 (VI-6) device for paging via the Paging Ports. Up to four VPSI-1 interfaces can be connected per VI-6 when configured for Vocia Auxiliary Microphone mode. The VPSI-1 can also facilitate third party microphones and control system interfacing with Vocia Wall and Desk Stations (WS-4/10 and DS-4/10). The host Paging Station must be configured for 'Remote control' mode within the software.