122 lines
4.4 KiB
Plaintext
122 lines
4.4 KiB
Plaintext
|
||
</>-<\>-</>-<\>-</>-<\>-</>-<\>-</>-<\>
|
||
|
||
Black Box Plans
|
||
|
||
For Calls from Granma
|
||
|
||
</>-<\>-</>-<\>-</>-<\>-</>-<\>-</>-<\>
|
||
|
||
To all who dare --
|
||
|
||
What is a BLACK BOX? A BLACK BOX is a device that is hooked up to
|
||
your fone that fixes your fone so that when you get a call, the caller
|
||
doesn't get charged for the call. This is good for calls up to 1/2 hour,
|
||
after 1/2 hour the Fone Co. gets suspicious, and then you can guess what
|
||
happens.
|
||
|
||
The way it works:
|
||
|
||
What this little beauty does is keep the line voltage from dropping
|
||
to 10v when you answer your fone. The line is instead kept at 36v and
|
||
it will make the fone think that it is still ringing while your talking.
|
||
The reason for the 1/2 hour time limit is that the Fone CO. thinks that
|
||
- More (Y)/N/NS? NS
|
||
something is wrong after 1/2 an hour of ringing.
|
||
|
||
All parts are available RadioShack. Using the least possible parts
|
||
and arangement, the cost is $0.98!!!! And that is parts for two of them!
|
||
Talk about a deal! If you want to splurge then you can get a small PC
|
||
board, and a switch. There are two schematics for this box, one is for most
|
||
normal fones. The second one is for fones that don't work with the first.
|
||
It was made for use with a Bell Trim line touch tone fone.
|
||
|
||
</> Schematic 1 for most fones <\>
|
||
</> LED ON: BOX ON <\>
|
||
|
||
FROM >--------------------GREEN-> TO
|
||
LINE >--! 1.8k LED !---RED--> FONE
|
||
! !
|
||
------>/<-------
|
||
SPST
|
||
|
||
|
||
Parts: 1 1.8k 1/2 watt resistor
|
||
1 1.5v LED
|
||
1 SPST switch
|
||
|
||
You may just have two wires which you connect together for the switch.
|
||
|
||
|
||
</> Schematic 2 for all fones <\>
|
||
</> LED ON: BOX OFF <\>
|
||
|
||
FROM >---------------GREEN-> TO
|
||
LINE >------- ---RED--> FONE
|
||
! LED !
|
||
-->/<--!>--
|
||
! !
|
||
---/\/\/---
|
||
1.8k
|
||
|
||
Parts: 1 1.8k 1/2 watt resistor
|
||
1 1.5v LED
|
||
1 DPST switch
|
||
|
||
|
||
Here is the PC board layout that I recommend using. It is neat and is
|
||
very easy to hook up.
|
||
|
||
Schematic #1 Schematic #2
|
||
|
||
************** ****************
|
||
* * * ------- *
|
||
* --<LED>--- * * ! ! *
|
||
* ! ! * * ! <SWITCH> *
|
||
* RESISTOR ! * * ! ! ! *
|
||
* ! ! * * ! ! / *
|
||
* -------- ! * * ! ! \ *
|
||
* ! ! * * ! <LED>! / *
|
||
* --SWITCH-- * * ! ! \ *
|
||
* ! ! * * ! ! / *
|
||
L * ! ! * F L * ! ! ! * F
|
||
I>RED- -RED>O I>RED- ---RED>O
|
||
N>-----GREEN---->N N>-----GREEN------>N
|
||
E * h * E E * * E
|
||
************** ****************
|
||
|
||
|
||
Once you have hooked up all the parts, you must figure out what set of
|
||
wires go to the line and which go to the fone. This is because of the fact
|
||
that LED's must be put in, in a certain direction. Depending on which way
|
||
you put the LED is what controls what wires are for the line & fone.
|
||
|
||
How to find out:
|
||
|
||
Hook up the box in one direction using one set of wires for line and
|
||
the other for fone.
|
||
|
||
*NOTE* - For Model I switch should be OFF.
|
||
|
||
*NOTE* - For Model ][ switch should be set to side connecting the led.
|
||
|
||
Once you have hooked it up, then pick up the fone and see if the LED
|
||
is on. If it is, the LED will be lit. If is doesn't light then switch the
|
||
wires and try again. Once you know which are which then label them.
|
||
|
||
*NOTE* - If neither directions worked then your switch was in the wrong
|
||
position. Now lable the switch in its current position as BOX ON.
|
||
|
||
|
||
How to use it:
|
||
|
||
The purpose of this box is not to poeple who call you so it would
|
||
make sence that it can only be used to receive calls. When the box
|
||
is *ON* then you may only recieve calls. Your fone will ring like normal
|
||
and the LED on the box will flash. If you answer the fone now, then the
|
||
LED will light and the caller will not be charged. Hang up the fone after
|
||
you are done talking like normal. You will not be able to get a
|
||
dial-tone or call when the box is on, so turn the box *OFF* for normal
|
||
calls. I don't recommend that you leave it on all the time, as you don't
|
||
want it to answer when MaBell calls!
|
||
|