On 14/03/2019 17:24, R D S wrote:
On 11/03/2019 21:17, Dave W wrote:

However, wireless doorbells have a downside - the sound is always the
same no matter how long or short the button press is, so you can't
tell how desperate the caller is.

If our doorbell rings and I haven't ordered a takeaway I don't get up.

Intercom system? Or you just don't care if the police are evacuating the
area because of unexploded bomb, chemical spill, marauding gang of
angle-grinder wielding Amazons or whatever?

--
Robin
reply-to address is (intended to be) valid