View Single Post
Old 10th Jun 2021, 5:44 pm   #4
Dave Moll
Dave Moll's Avatar
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 5,455
Default Re: "Duck" telephone

Originally Posted by merlinmaxwell View Post
It looks to be the same frequency as your dial tone, is it. Does it go away on a silent line?
No, it sounds a similar frequency to 50Hz mains hum, whereas the PABX uses the modern (350+440?) dial tone.

It certainly doesn't go away once the dial tone times out (after 20 seconds), though the dial tone is pretty much inaudible anyway over the buzz, so I can't hear when it has stopped.
Mending is better than Ending (cf Brave New World by Aldous Huxley)

Last edited by Dave Moll; 10th Jun 2021 at 5:52 pm.
Dave Moll is offline   Reply With Quote