Re: [hylafax-users] use fax machine as scanner

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

On 2004.07.23 08:52 A J Stiles wrote:

> You could try this.  Get two telephone sockets and a 12V regulated
> power
> supply.  Make sure the power supply is *not* earthed.  Wire the
> positive
> terminal of the power supply to one of the active terminals in the
> first
> socket*, the other active terminal to the second socket, and the other
> active
> terminal of the second socket to the negative terminal of the power
> supply.
> Plug your FAX and modem into the two sockets, so they are in series
> with one
> another and the power supply.
>
> This will allow the modem to 'hear' the tones created by the FAX
> machine, but
> it is as though the call was already established; there is no
> provision for
> dialling, ringing or the like.

Most modems and fax machines that I have tested provide their own 
current so that you can connect two devices directly together with a 
cable.  Dial on one, answer on the other, and voila!  The only devices 
that I have not seen do this properly are some (but not all) USR 
modems, and Comtrol RocketModems.

In fact, most HylaFAX development that I do that involves actually 
sending/receiving a fax occurs this way between two external modems.  I 
send a fax, specifying the modem (sendfax -h), and then I wait for the 
"off-hook" LED to light up, and then I run 'faxanswer' for the other 
modem.

Lee.

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