Source for basic doorphone?

[Bob Eager]

I saw those. The distance from front gate to door is 1.5 metres!

[js.b1]

#1 - Create your own enclosure #2 - IP66 vandal resistant push-button (about =A37-8 anywhere). #3 - Elderly alert push-button auto-dialler #4 - Waterproof microphone (check Ebay first)

Alert push-button dialler - 280314305970 Alarm dialler - 170614778518

You want a 2-way communication facility? I believe there are diallers which offer that, basically they interface to an alarm and allow you to listen in via an internal microphone etc.

[Bob Eager]

Thanks. Yes, need 2 way really. Which supplier are those numbers for?

[John Williamson]

ebay auction numbers.

[Owain]

(American book)

has circuits for building speakerphone, DTMF receiver, etc.

Owain