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

["Ian B" <Ian@xxxxxxx>]

I don't know hence the prod with a multimeter

Give me a call if you want to discuss further

Ian
01264 711106

> -----Original Message-----
> From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
> Sent: 07 December 2001 17:10
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Re: How do I tell whether the phone's ringing?
>
>
> Surely not on longer than a 5 second cycle, though?
>
> Mark Harrison
> Head of Systems, eKingfisher
>
> -----Original Message-----
> From: Ian B [mailto:Ian@xxxxxxx]
> Sent: 7 December 2001 17:00
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Re: How do I tell whether the phone's ringing?
>
>
> This depends on the output from the modem. If it is a continuous high
> then
> yes but if it 'rings' like the phone bell then the delay could reset
> itself
> and then be triggered again. A prod with a multimeter or scope would
> tell.
>
> Ian
>
> > -----Original Message-----
> > From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
> > Sent: 07 December 2001 12:22
> > To: ukha_d@xxxxxxx
> > Subject: RE: [ukha_d] Re: How do I tell whether the phone's
ringing?
> >
> >
> > Ian,
> >
> > I guess that the appropriate line on a modem is the best way.
> >
> > I would have thought that with a 5 second delay, then there was
no
> fancy
> > HV programming to be done. The "gone low" would mean 
"it's rining
> now",
> > and the "gone high" would mean "it's stopped"
 = Have I understood
> > correctly?
> >
> > Regards,
> >
> > Mark Harrison
> > Head of Systems, eKingfisher
> >
> > -----Original Message-----
> > From: Ian B [mailto:Ian@xxxxxxx]
> > Sent: 6 December 2001 20:24
> > To: ukha_d@xxxxxxx
> > Subject: RE: [ukha_d] Re: How do I tell whether the phone's
ringing?
> >
> >
> > OK Mark
> >
> > As the delay unit stands it accepts a +ve signal as a trigger and
has
> a
> > delay adjustable from almost nothing to about 5 seconds. Assuming
it
> is
> > triggered by either the phone line itself via an optocoupler
(chip
> > thingy)
> > or through the modem ring line it can bring an HV input port low
for
> the
> > delay time set. This will give HV time to notice the port change
of
> > state
> > even if it is doing something else for a short while and do
whatever
> is
> > programmed. I guess the only thing to program round is multiple
> triggers
> > if
> > the delay is short. More detail on this another time but it is
easy to
> > program round with a timer.
> >
> > Let me know how you want to connect it and I will think about how
to
> do
> > it.
> >
> > Ian
> >
> > > -----Original Message-----
> > > From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
> > > Sent: 06 December 2001 09:17
> > > To: ukha_d@xxxxxxx
> > > Subject: RE: [ukha_d] Re: How do I tell whether the phone's
ringing?
> > >
> > >
> > > I'M INTERESTED!
> > >
> > > Mark Harrison
> > > Head of Systems, eKingfisher
> > >
> > >
> >
>
************************************************************************
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> > >
> > >
> > > -----Original Message-----
> > > From: Ian B [mailto:Ian@xxxxxxx]
> > > Sent: 5 December 2001 20:35
> > > To: ukha_d@xxxxxxx
> > > Subject: RE: [ukha_d] Re: How do I tell whether the phone's
ringing?
> > >
> > >
> > > 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
> > > > --
> > > >                               /\/\
> > > > ant@xxxxxxx                   (`')                 
www.ant.org
> > > >                                ()
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