RE: DTFM, Meteors & HomeSeer

["Keith Doxey" <lists.diyha@xxxxxxx>]

Hi Justin,

You mean DTMF (Dual Tone Multi-Frequency) :-)

There isnt any specific code that will do what you want to do however
there
is a way round it using a relay and a DTMF receiver which you already
have
with Meteor.

Unless you are in a really big city there is probably a number range that
is
completely unused (where I am dialling 2 as the first digit gives
Number
Unobtainable)

If you configure your software to look for the first digit(s) that
arent
used in your area imeadiately after going off hook then it can detect
that
it is NOT a genuine call. You then use the relay to disconnect the line
from
the exchange and connect it to a 12V supply instead via a 100 ohm
resistor
like this


Line B-----------\-----------
+12V
---100R----            
Phones/Meteor/Homeseer etc

Line A ----------\----------
  0V-------------

On initial lifting of the phones you would get dial tone from the
exchange,
dial your "house" code and Homeseer operates the relay to
disconnect you
>from
will allow subsequent tones to be interpreted properly. When you detect
the
phone being replaced you release the relay and the phones are connected
back
onto the line.

You must only trigger if the "house" code it the first digit
dialed
otherwise you wont be able to dial any numbers containing that digit
:-)

Hope that makes some kind of sense :-)

Keith

www.diyha.co.uk
www.kat5.tv


-----Original Message-----
From: Justin [mailto:justin@xxxxxxx]
Sent: 13 May 2002 19:55
To: UKHA
Subject: [ukha_d] DTFM, Meteors & HomeSeer


I doubt this is possible, but I'll ask anyway..is anyone aware of a
DTFM
code that could be dialled so as the telephone exchange would not try
and
connect a call?

The reason I ask is that I am working on a Meteor plugin for HomeSeer and
I
thought it would be pretty smart if I could include the ability to
control
devices around the house using internal phones with it...
As I'm sure many of you are aware the Meteor can detect off hook and DTFM
so
I figured if my plugin could detect a off hook event followed by a DTFM
sequence, e.g. "#" + "*" then it could go into a
'command mode'  pressing 1*
would turn say, A1 on and 1# would turn it off etc.
Of course the problem with this is that after a few buttons I get the
"the
number you have called is unavailable" message, hence the question.
Any
bright ideas?

Cheers,
Justin.



For more information: http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe:  ukha_d-subscribe@xxxxxxx
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
List owner:  ukha_d-owner@xxxxxxx
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

Yahoo! Groups Sponsor

ADVERTISEMENT

For more information: http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx 
Subscribe:  ukha_d-subscribe@xxxxxxx 
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx 
List owner:  ukha_d-owner@xxxxxxx

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.