134 lines
6.5 KiB
Plaintext
134 lines
6.5 KiB
Plaintext
|
|
|||
|
|
-/SWITCHBOX PLANS/-
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
This tutorial is notable in that it is totally and absolutely within legal
|
|||
|
|
bounds. It's only object is to guide you in building a device with which you
|
|||
|
|
can control, on many different levels, your home phone lines. It is designed
|
|||
|
|
primarily for two phone numbers, although I suspect that provisions for more
|
|||
|
|
than two can be easily added. With it, you can put one or both phone lines on
|
|||
|
|
hold with visible indicators of each lines status; conference call with two
|
|||
|
|
people; change a phone from line #1 to line #2; and lastly, make one phone
|
|||
|
|
line physically dead to outside world. This is good, for instance, if you
|
|||
|
|
don't want to recieve any calls, or if you want to stop someone from talking
|
|||
|
|
on that line really quickly.
|
|||
|
|
The circut is relatively simple to build and I believe it is much more
|
|||
|
|
economical than buying something like Radio Shack's line controller. It will
|
|||
|
|
require some knowledge of electronics and the phone line in general, but I
|
|||
|
|
don't think that should be a problem. I have personally found many uses for
|
|||
|
|
the controller, and have put in into a pleasant "project box" so it is not an
|
|||
|
|
eyesore.
|
|||
|
|
OK, now, let's start with the parts list --------
|
|||
|
|
|
|||
|
|
============================================================
|
|||
|
|
*** Parts List ***
|
|||
|
|
|
|||
|
|
1. Two pushbutton (on-off) switches for hold
|
|||
|
|
2. Two LED's for line status indication
|
|||
|
|
3. One DPDT switch for conferencing
|
|||
|
|
4. One SPST switch for line shut off
|
|||
|
|
5. Another DPDT switch for phone line switching
|
|||
|
|
6. Get some wire, you'll need it!
|
|||
|
|
7. 2 modular phone plugs with at least 10 feet of wire each
|
|||
|
|
8. Two 1.7K ohm resistors
|
|||
|
|
9. *OPTIONAL* - Project Box
|
|||
|
|
=============================================================
|
|||
|
|
|
|||
|
|
*** Construction ***
|
|||
|
|
|
|||
|
|
We will take the construction of the switchbox-controller in parts. First,
|
|||
|
|
the hold switches and status indicators. The following is a diagram of the
|
|||
|
|
essential circut:
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
Pushbutton #1 LED
|
|||
|
|
--------------------------!x!-----0---
|
|||
|
|
Phone Line #1 1.7K Resistor !
|
|||
|
|
-----------------/!/!/!/!/------------
|
|||
|
|
|
|||
|
|
Some word of explanation is in order. First of all, the second phone line
|
|||
|
|
hold is constructed the same as the first. Basically, there are two wires come
|
|||
|
|
out of your phone line, the red and the green. You have to experiment to find
|
|||
|
|
out which one is connected to the pushbutton switch and which one to the
|
|||
|
|
Resistor. To do this, just connect it in anyway and then turn the switch on.
|
|||
|
|
If the LED lights up, you connected it right, otherwise reverse the
|
|||
|
|
connections. Got it? Good, now do the same for line #2, following exactly the
|
|||
|
|
same procedure.
|
|||
|
|
|
|||
|
|
Now, let's do an easy one. This will be the line blackout switch. First,
|
|||
|
|
decide which line you wish to black out. Actually, you can do it to both lines
|
|||
|
|
if you wish, just get an extra SPST switch. Now, connect the switch across the
|
|||
|
|
line as follows:
|
|||
|
|
|
|||
|
|
--------------------------------!!!!!!!!
|
|||
|
|
x ! Hold !
|
|||
|
|
!x! <---Switch !Circut!
|
|||
|
|
x ! !
|
|||
|
|
--------------------------------!!!!!!!!
|
|||
|
|
|
|||
|
|
Don't worry that your line can't handle both circuts, it can. To test out,
|
|||
|
|
pick up a phone on the line you have connected the switch to and flip it on.
|
|||
|
|
There should be dead silence. Now, turn it off. You should hear a dial tone.
|
|||
|
|
You have to be an absolute idiot if this doesn't work.
|
|||
|
|
|
|||
|
|
OK, let's see what we have so far. If everything is working you should now
|
|||
|
|
have two hold circuts and a blackout switch connected. Now it really gets tough!
|
|||
|
|
|
|||
|
|
Next on the agenda is the conference switch. I have a few precautions for
|
|||
|
|
you on this one. First, you have to know what you're doing, and second, it
|
|||
|
|
doesn't work that well. The reason it doesn't is because I am naturally very
|
|||
|
|
lazy and didn't feel like adding the needed phone transformer. But, it is still
|
|||
|
|
good for many uses, limited only by your imagination (to use a cliche').
|
|||
|
|
First, take the double pole double throw switch into your
|
|||
|
|
hand. It should look like this on the back:
|
|||
|
|
|
|||
|
|
---------
|
|||
|
|
- 1 2 -
|
|||
|
|
- 3 4 -
|
|||
|
|
- 5 6 -
|
|||
|
|
---------
|
|||
|
|
* Note - Numbers correspond to actual pins.
|
|||
|
|
|
|||
|
|
Now connect two wires to pins 3 & 4 and two wires to pins 1 & 2. The wires
|
|||
|
|
going to pins one and two are connected across the first phone line and the
|
|||
|
|
wires from three and four go across the second phone line. Test it out: Pick
|
|||
|
|
up your phone (either line) and wait for dial tone. Then throw on the
|
|||
|
|
conference switch. You should get a second dial tone. Now dial 555-1212. You
|
|||
|
|
should now have two D.A.'s on the line, asking each other "What City?". If not,
|
|||
|
|
then reverse the connections to phone line #1 or #2, it doesn't matter. Now it
|
|||
|
|
should work. If not, then recheck EVERYTHING! You messed up!
|
|||
|
|
|
|||
|
|
Now for the last section - the phone line switcher. With this, you can
|
|||
|
|
connect a phone directly to the switchbox and have it operate from line #1 or
|
|||
|
|
line #2, depending on the position of the last DPDT switch. Let me emphasize
|
|||
|
|
that this is optional. Actually, all the circuts are - they are independent of
|
|||
|
|
each other and each can be built separately or together.
|
|||
|
|
|
|||
|
|
Now, refering to the diagram of the DPDT switch above:
|
|||
|
|
|
|||
|
|
Connect two wires to pins 1 & 2. Then connect these to phone line #1. Now
|
|||
|
|
connect two wires to 5 & 6 and connect these to phone line # 2. Lastly,
|
|||
|
|
connect two wires to 3 & 4 and connect the ends of these to a phone. That's
|
|||
|
|
it! Now, pick up the phone and you should hear a dial tone. Throw the switch
|
|||
|
|
and you should hear another dial tone. In some areas you may dial '958' to
|
|||
|
|
hear exactly what number you are currently connected to, but that should be a
|
|||
|
|
problem. If you really can't figure it out, then either trace the circut back
|
|||
|
|
or call one of the numbers and see if you get a busy signal or if it rings.
|
|||
|
|
|
|||
|
|
Finally - Put the whole mess inside a project case, unless you like the
|
|||
|
|
site of wires all over the place. This also shouldn't be a problem if you know
|
|||
|
|
even the basics of hardware construction.
|
|||
|
|
|
|||
|
|
Any questions may be directed to AUTOPSY SAW at Lion's Den BBS * (xxx) xxx-
|
|||
|
|
xxxx *. This file was presented to you for the public good. Sit belonely down
|
|||
|
|
a tree!
|
|||
|
|
|
|||
|
|
______________________________________________________________________________
|
|||
|
|
|
|||
|
|
_________________________________-END-________________________________________
|
|||
|
|
o Written by Autopsy Saw
|
|||
|
|
|
|||
|
|
|
|||
|
|
|