Re: caller id to open electric gate

["Alancc" <alan.cc@xxxxxxx>]

We've done this for customers using a separate telephone line and a
ring/relay unit  from RS, when the line is called the relay changes
state
and opens the gate, not very secure as anyone who knows the number can
open
the gate but it is simple.

Alancc
----- Original Message -----
From: <umar@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, May 16, 2002 9:51 PM
Subject: [ukha_d] caller id to open electric gate


> Last year when we were looking to buy a house rather than build we
visited
a
> new housing estate built near us. The estate agent waited outside and
when
> we arrived he used his mobile phone to call somewhere, and magically
(!!)
> the gate opened. We were most impressed.
>
> Anyone any ideas how this can be achieved - caller id and comfort ?
man on
> other  end of phone to push "open" button ;-).
Seriously, anyone any ideas
?
>
> Umar
>
>
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