Hidden codes on PA systems

virginradio.co.uk — Londoners will probably be aware of Inspector Sands, not a man but a coded announcement that can be heard at Tube and major rail stations: "Would Inspector Sands please come to the control room immediately." It sounds when an alarm is tripped and if a member of staff doesn?t clear the problem before a set time elapses. More hidden codes here... Dec 21, 2006 View in Crawl 4