b78710 From United Kingdom, joined Mar 2006, 340 posts, RR: 0 Reply 1, posted (3 years 3 weeks 1 day 13 hours ago) and read 2599 times:
i would assume so.
the button normally illuminates an orange light outside the toilet, and an orange light at the cabin attendants station. accompanied with a chime to alert them. if there was no chime it could go un noticed for a while.