b78710 From United Kingdom, joined Mar 2006, 346 posts, RR: 0
Reply 1, posted (5 years 2 weeks 3 days 9 hours ago) and read 3242 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.