The UK Home Automation Archive

Archive Home
Group Home
Search Archive


Advanced Search

The UKHA-ARCHIVE IS CEASING OPERATIONS 31 DEC 2024


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: New BT Charges and 1 hour phone calls. How to enforce them


  • To: ukha_d@xxxxxxx
  • Subject: Re: New BT Charges and 1 hour phone calls. How to enforce them
  • From: "patricklidstone" <patrick@xxxxxxx>
  • Date: Thu, 08 May 2003 09:43:08 -0000
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

> > 4) Finally, is it possible without spending loads of money to
have
> the
> > computer conceptually  'pick up' another handset and give the
> warnings as
> > though they were another person on the line?
>
> Yes, this is possible. You'd need to build (or buy) a BT line
> interface to the sound card, and switch it in using your relay
setup.
> Simpler still would be superimposing an advisory tone - if your
tone
> generator is suitably high impedance, you should be able to get
away
> with doing it without needing relays. EPanorama is a good starting
> point for the design of this type of stuff, and I'm pretty sure
> Maplin will have a suitable interface available off-the-shelf.

Another thought... you could also do this by taking a voice modem off
hook and playing a WAV file.

Patrick



Home | Main Index | Thread Index

Comments to the Webmaster are always welcomed, please use this contact form . Note that as this site is a mailing list archive, the Webmaster has no control over the contents of the messages. Comments about message content should be directed to the relevant mailing list.