      WIRETAPPING FILE

   Here is some info on phone taps. I have enclosed a schematic for a
simple wiretap & instructions for hooking up a tape recorder control
relay to the phone line.

   First I'll discuss taps a little. There are many different types
of taps. There are tranmitters, wired taps and induction taps to name
a few. Wired and wireless transmitters must be physically connected
to the line before they'll do any good.

   Once a wireless tap is connected to the line, it can transmit all
conversations over a limited range. The phones in the house can even
be modified to pick up conversations in the room & transmit them too!
These taps are usually powered off the phone line, but can have an
external power source.

   Wired taps, on the other hand, need no power source, but a wire
must be run from the line to the listener or to a transmitter.  There
are obvious advantages of wireless taps over wired ones.  There is
one type of wireless tap that looks like a normal telephone mike.
All you have to do is replace the original mike with this & it'll
transmit all conversations!

   There is an exotic type of wired tap known as the 'infinity
transmitter' or 'harmonica bug'.  In order to hook up one of these,
you need access to the target telephone.  It has a tone decoder &
switch inside.  When it is installed, someone calls the tapped phone
& *before* it rings, blows a whistle over the line. The x-mitter
receives the tone & picks up the phone via a relay. The mike on the
phone is activated so the caller can hear all conversations in the
room.

   There is a sweep tone test at 415/bug-1111 which can be used to
detect one of these taps.  If one of these is on your line & the test
# sends the correct tone, you'll hear a click.

   Induction taps have one big advantage over taps that must be
physically wired to the phone.  They don't have to be touching the
phone in order to pick up the conversation. They work on the same
principle as the little suction-cup tape recorder mikes you can get
at radio shack. Induction mikes can be hooked up to a transmitter or
be wired.

   Here is an example of industrial espionage using the phone:

   A salesman walks into an office & makes a fone call.  He fakes the
conversation, but when he hangs up he slips some foam-rubber cubes
under the handset, so the fone is still off the hook.  The called
party can still hear all conversations in the room. When someone
picks up the fone, the cubes fall away unnoticed.

   I use a tap on my line to monitor what ae-pro is doing when it
auto-dials, since it doesn't take advantage of the handset on the
apple cat ii.  I can also hook up the tap to a cassette recorder or
amplifier.

           Here is the schematic:
     -------)!----)!(------------->
                  )!(
      cap >       )!(
                  )!(
                  )!(
                  )!(
          >>>>>---)!(------------->
            >  100k
            !
            !<input

   The 100k pot is used for volume. It should be on its highest
(least resistance) setting if you hook a speaker across the output,
but it should be set on its highest resistance for a tape recorder or
amplifier.  You may find it necessary to add another 10-40k.  The
capacitor should be around .47 mfd.  It's only purpose is to prevent
the relay in the co from tripping & thinking you have the fone off
the hook.  The audio output transformer available at radio shack
(273-1380) is fine for the x-former. The black & green are fine for
input & the red & white go to the output device.  You may want to
experiment with the x-former for the best output.

   Hooking up a tape recorder control relay is easy.  Just one of the
fone wires (usu. red) before the telephones & hook one end to one
wire of the relay & the other end to the other relay wire.  Like
this:

     ------>>>>>>>>>------------
           ---------
           relay>>
