This option uses a PIC even...
http://hackedgadgets.com/2007/03/27/alarm-phone-dialer/


>>> eross@chemstation.com 13 Apr 08 15:27:30 >>>
I just had a thought - TOTALLY inelegant though...

Butcher an old phone...
PLC relay takes the phone off hook. 
DTMF encoder dials a number through the handset. (Cell phone)
Pause
Play a tune (Some interesting ones come to mind)
           Split Enz - Six months in a leaky boat (Flooding)
           Talking Heads - Burning down the house (Self explanatory)



>>> cdenk@alltel.net 13 Apr 08 15:02:10 >>>
Thanks for the replies. :)
Yes, I had that also, at work pagers could receive text, sent from a PC, 
either home or work. This is home and resources are somewhat limited and 
additional monthly, or considerable $$ in equipment is not an option.

And for Peter Green's thoughts: The simple login that appears on a text 
terminal screen was just yesterday. at about the same time as the 
conversation I copy/pasted from the RS-232 spy, I think it's current.

Monday, I'll try again, and try to get to the USA tech support that was 
Lincoln, Ne. Maybe they have another phone number that uses the 
simplified login. The offshore techies are clueless. I have thought 
about copying my side of the login conversation to the PLC PRINT 
statement, but I don't think I have enough free memory for that, or to 
implement some protocol.

New thought: Is it worth pursuing, our cell phone is on AT&T, might they 
have a number the PLC modem can dial into, and send a message?

piclist@ian.org wrote:
> On Sun, 13 Apr 2008, Carl Denk wrote:
>   
>> Just to restate the issue: A PLC (stand alone industrial computer) wants 
>> to dial out and send an E-mail when there is an alarm condition. The PLC 
>> has no problem dialing the modem which request is answered by the ISP 
>> and requests login. Thought this was an appropriate list since this 
>> seems like a common application for remote equipment to call home with 
>> data. If it is felt that this is not appropriate, feel free to use my 
>> address to send to me, but then there may be people on the list who 
>> won't benefit
>>     
>
> Back in 1995 I used a pager service that had a dial up modem option you 
> could have a computer call and send text pages to.  I have no idea if such 
> things are still around in the days of internet and cell phones.
>
> A PLC is designed for all sorts of crazy electrical connections so I'd say 
> on topic, but I might be wrong.  Actually.. small devices like PICs 
> interfacing to pagers and such is pretty common, so this should be a good 
> place to get ideas and advice.
>
> --
> Ian Smith
>   
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