RE: Re: How do I tell whether the phone's ringing?

["Ian B" <Ian@xxxxxxx>]

I have a little delay unit that can take a modem out signal and bring an HV
input port low. I'd have to see (prod with a meter) the modem to be sure
but
I don't see any reason why not.

Shout if you are interested.

Ian

> -----Original Message-----
> From: Ant Skelton [mailto:ant@xxxxxxx]
> Sent: 05 December 2001 13:52
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Re: How do I tell whether the phone's ringing?
>
>
> Mark Harrison wrote:
> >
> > Hmmm... really wanted something that didn't involve a PC :-(
>
> You could use a modem plugged in to the phone line. When the phone
> rings, the modem will send "RING RING" out the serial port.
Not sure
> whether you can interface this to homevision, as I don't have one.
>
> My guess would be you either have an rs232 port (in which case you're
> laughing) or a TTL IO pin or somesuch, which might be tricker. To
> interface to that I guess you'd need to knock up a simple little
circuit
> - not sure if that's your bag or not.
>
> Although thinking about it, I don't thing modems send out anything
else
> down the serial port when they're quiescent, so maybe looking for
level
> changes on the modem's serial TX line would be sufficient.
>
> YMMV, HTH etc
>
> ant
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