Re: caller id to open electric gate

[<umar@xxxxxxx>]

Could it be done by calling a separate number and then passing a series
of
DTFM (!!!!) tones ie a pin number ?
----- Original Message -----
From: "Alancc" <alan.cc@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Friday, May 17, 2002 5:28 PM
Subject: Re: [ukha_d] caller id to open electric gate


> 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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