other voltages and options on request. DS sounders Audio-Number Description Graphic Audio Sample 2 : EN54-3 Sawtooth, DIN tone 33404-3 Germany (emergency signal), PFEER PTAP 15 Slow whoop, evacuation alarm [...] 45 Sweeping 54 Continuous tone, Finland (all-clear signal) 55 Continuous tone, PFEER gasalarm 57 w. EN54-3 Continuous tone, UK BS 5839-1 60 Continuous tone 63 Continuous tone 67 Continuous tone, Germany [...] tone, IMO SOLAS lll/50 + SOLAS lll/6.4 (general alarm) 125 Alternating tone 127 Alternating tone 128 : EN54-3 Alternating tone 131 Alternating tone, UK BS 5839-1 (fire alarm, railway crossing) 142 Alternating