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- THE BEIGE BOX
- -------------
-
- A beige box is an easy way of tapping into phone lines. It is basically
- an adaptor for connecting a normal phone with a BT plug onto a pair of
- phone wires.
-
- You will need: one cheap phone, two crocodile clips, some wire and a
- telephone socket and wallbox. If you use a master (primary) socket your
- phone will be able to ring; if you just use a secondary (slave) socket,
- it will never ring. {but see below.}
-
- HOW TO MAKE IT
- --------------
-
- Solder the crocodile clips onto each end of half a metre of wire. Cut
- the wire and pass it through a convenient knockout in the socket
- wallbox, so that the clips are on the outside. Connect one wire to pin
- 2 of the phone socket, and one to pin 5 of the phone socket. {it is
- easier if your socket has screw terminals rather than IDC terminals,
- especially if your wire is stranded.} Screw the socket onto the wallbox
- and plug in the phone. That's it.
-
- HOW TO USE IT
- -------------
-
- Clip the clips onto the two wires of a phone line, and dial away.
- That's all you have to do.
-
- IDEAS FOR IMPROVEMENTS
- ----------------------
-
- 1. If you used a secondary socket but later decide you would rather
- have a primary socket, simply add a 1.8uF 100V capacitor in the
- position marked C1 on the PCB inside the socket. {1.5uF or 2.2uF will
- do the job, if you can't get 1.8uF, but it must NOT be an electrolytic
- capacitor, and it MUST be rated 100V or over.} If you are using a
- slimline socket without a PCB, the capacitor should be wired between
- pins 2 and 3.
-
- 2. If you want a line status indicator: get a two-colour LED {the type
- with two leads, that glows red when the current is in one direction and
- green in the other} and a 6.8k resistor. Wire these, in series, across
- the position marked SP1 on the PCB. {don't connect the middle of the
- series pair to anywhere.} For PCB-less sockets, this is the equivalent
- of pins 2 and 5, ie the pair connected to the clips. It will indicate
- the line polarity {red or green} which is not particularly important,
- and the line status {dim = in use, bright = clear} which is.
-
-
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