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Old 18th May 2019, 11:15 am   #6
winston_1
Hexode
 
Join Date: Oct 2012
Location: London, UK.
Posts: 497
Default Re: GPO/BT Call Progress Tones?

Quote:
Originally Posted by Dave Moll View Post
Quote:
Originally Posted by Chris55000 View Post
What happened if you picked the phone up and carried on listening whilst any of these tones (apart from ringing–tone of course!) were in progress – did they carry on indefinitely?
I wouldn't exclude ringing tone from the list, as there was (and still is) a limit to how long it will continue if the called party doesn't answer.
I wouldn't say "was". I remember as a nasty kid ringing a building site with an outside bell from a local call box and leaving it ringing for around 2 hours on a Sunday. Eventually someone came to use the call box and nicked my 4d.
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