On 2010-07-22, Owain wrote:
On 22 July, 21:26, Roger Mills wrote:
My holiday flat has an intercom system which is supposed to enable me to
communicate with callers and let them in if appropriate.
Outside the main door, there's a box with microphone and speaker, and a
button for each flat, thus:http://www.mills37.plus.com/Intercom.JPG
Inside each flat, there's a handset with a button to press to release
the door, thus:http://www.mills37.plus.com/Handset.JPG

http://www.bellsystem.co.uk/

Sounds like the carbon capsule has indeed gone kaputt.

Sometimes the carbon granules are stuck together and banging
the handset on something hard loosens them up. Worth a try
if you are going to replace it anyway.

--
Jón Fairbairn
http://www.chaos.org.uk/~jf/Stuff-I-dont-want.html (updated 2009-01-31)