Alternating tone 128 : EN54-3 Alternating tone 131 Alternating tone, UK BS 5839-1 (fire alarm, railway crossing) 142 Alternating tone 146 Alternating tone, France NFS 32-001 (fire alarm) 1 Die-cast aluminium [...] 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 Netherlands NEN [...] 31 Sweeping France NF C 48-265 36 Sweeping 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