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Black Box
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HERE IS HOW YOU CONSTRUCT A BLACK BOX.
WHEN YOUR PHONE IS JUST SITTING THERE DOING NOTHING THE
VOLTAGE THROUGH THE PHONE LINE IS ZERO. THEN IF SOMEONE CALLS
YOU (FOR SOME STRANGE REASON) AND THE PHONE IS RINGING. THE
VOLTAGE JUMPS TO 48 VOLTS WHICH TELLS MA BELL TO STAND BY IF YOU
SHOULD PICK UP SO SHE CAN BILL YOU. WHEN YOU EVENTUALLY PICK UP
THE PHONE, THE VOLTAGE DROPS TO 10 VOLTS AND THE BILLING STARTS.
WHAT A BLACK BOX DOES IS KEEPS THE THE VOLTAGE AS 36 VOLTS,
THEREFORE THE INCOMING CALLER NEVER GETS BILLED (INGEINIOUS)
THE ORIGINAL BLACK BOX WAS CREATED BY AN EX-BELL EMPLOYEE WHO
WENT BY THE NAME "CAPTAIN CRUNCH". HE GOT HIS NAME FROM THOSE
LITTLE WHISLES YOU GOT IN BOXES OF CAPTAIN CRUNCH BECAUSE THEY
EMITED A TONE THAT WAS EQUAL TO A COIN.CAPTAIN CRUNCH JUST
ANNOUNCED HIS RETIREMENT FROM PHREAKING WHEN HE WAS RELEASED
FROM A CALIFORNIA JAIL. HE WAS CAUGHT WITH A BLUE BOX.
CONSTRUCTION OF A
BLACK BOX
1] A 36 VOLT ZENER DIODE.
2] A CERAMIC OR MYLAR CAPACITOR OF 0.1 MICROFARAD.
3] A ELECTROLYTIC CAPACITOR OF 1.0 MICROFARAD.
YOU CAN GET THESE AT YOUR LOCAL RADIO SHACK DEALER.
FIRST YOU HAVE TO OPEN UP YOUR PHONE.YOU SHOULD NOTICE THREE
WIRES COMING IN FROM THE BACK OF THE PHONE, A GREEN, RED, AND
YELLOW. MOST OF THE TIME THEY CAN DIFFER.DON'T WORRY ABOUT THE
YELLOW WIRE, WE WILL NOT BE USING THIS.YOU WILL NEED TO FIND THE
MOST POSITIVE OF THE REMAINING TWO WIRES.(ALMOST ALWAYS THE
GREEN WIRE). NOW CONNECT THE BANDED END OF THE ZENER DIODE TO
THE MORE POSITIVE OF THESE TWO WIRES. "IN SERIES". YOU HAVE JUST
COMPLETED THE FIRST STEP. FOR THE SECOND STEP YOU NEED A
CERAMIC OR MYLAR CAPACITOR OF 0.1 MICROFARAD. YOU CONNECT THIS
"IN PARRALLEL" ACROSS THE DIODE. THIS IS NEEDED TO ALLOW THE
DIODE TO PASS VOICE SIGNALS. NOW FOR THE FINAL STEP TAKE YOUR
ELECTROLYTIC CAPACITOR OF UP TO ONE MICROFARAD WITH ITS '+' END
CONNECTED TO THE BANDED END OF THE DIODE AND THE OTHER END
SHOULD BE CONNECTED TO THE ANODE END OF THE DIODE. MA BELL IS
NOT TOTALLY OBLIVIOUS TO THIS.IF THE PHONE RINGS FOR ABOUT A
HALF-HOUR THEY WILL THINK SOMETHING IS WRONG AND BILL YOU
ANYWAY. WHEN USING A BLACK BOX,YOUR PHONE WILL CONTINUE RING
EVEN THOUGH YOU PICKED IT UP. YOU HAVE TO MAKE A SWITCH TO
CONNECT ONE OF THE RINGER WIRES.THAT WILL SHUT IT OFF. THAT'S
IT! HAVE PHUN!!!!!!!!!!!!!!!!
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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 insted 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 something is wrong
after 1/2 an hour of ringing.
All parts are available Radio
Shack. 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
Trimline 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
************** ****************
* * * ------- *
* ----- * * ! ! *
* ! ! * * ! *
* RESISTOR ! * * ! ! ! *
* ! ! * * ! ! / *
* -------- ! * * ! ! \ *
* ! ! * * ! ! / *
* --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 Ma
Bell calls!
PLEASE NOTE THE BLACK BOX WILL NOT
FUNCTION UNDER MOST NEWER ESS SWITCHING
SYSTEMS.....
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What is a BLACK BOX? A BLACK BOX is a device that is hooked up
to your phone that fixes your phone 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 Gestapo (the you can guess what happens.
What this little beauty does is keep the line voltage from
dropping to 10v when you answer your phone. The line is insted kept at
36v and it will make the phone think that it is still ringing while your
talking. The reason for the 1/2 hour time limit is that the Gestapo thinks
that something is wrong after 1/2 an hour of ringing. (I mean, come on)
(>Phone Modification Instructions<)
All parts are available Radio Shack. Using the least possible parts
and arrangement, 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 board, and
a switch. There are two s
** 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
************** ****************
* * * ------- *
* ----- * * ! ! *
* ! ! * * ! *
* RESISTOR ! * * ! ! ! *
* ! ! * * ! ! / *
* -------- ! * * ! ! \ *
* ! ! * * ! ! / *
* --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.
In order to find out, hook up the box in one direction using
one set of wires for line and the other for phone.
*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.
The purpose of this box is not to people who call you so it would
make sense that it can only be used to recieve calls. When the box
is *ON* then you may only recieve calls. Your phone will ring like normal
and the LED light on the box will flash. When you answer the fone the LED
will light and the caller will not be charged. Hang up the fone after you
are done like normal. You will not be ab
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