WSD-1 audible signal switch
WSD-1 sound signal switch is intended to operate together with SA-K5, SA-K6, SA-K7, SA-P8, SAO-P8, SG-Pgw3, SGO-Pgw, SAOZ-Pk2, SGO-Pgz3 signaling devices. The switch serves to switch off acoustic signal coming from the above-mentioned signaling devices.
