# # ____ ___ ______ __ ______ __ __ __ ___ / / / / / > / /___/ / > /__> /__> /_ <___/ <___ / <__/ / / / <__/ / \ / <___ P R O D U C T I O N S Presents _______________________________________________________________________________ Making a Global Hold/Mute Switch _______________________________________________________________________________ First of all, I will tell you a little about what this unique device can do. Say for instance you are making a confidential call, and someone picks up another extension. Simply hit the switch and all the phones connected to your same line will go dead. Hit the switch again and you are back to your original conversation. As you can see, no more worrying about privacy. This can also be used as mute, but it's more powerful as it affects all the phones on a line. Do you sometimes want to take the phone off the hook, but you don't want to be bothered with the ear-piercing noise that is generated by the telco when the phone is off-hook, or you think that a phone lying off-hook is unsightly? Then just flick the switch when the phone is in its normal position, and when you are ready to recive calls you can flip it back. There are many other uses for this device, and I'm sure that you can find many more to fit your individual needs. Parts/Equipment List --------------- ---- Mini LED, size T-1, Radio Shack Cat. No. 276-026[Red], 276-037[Green] Submini SPST toggle, Radio Shack Cat. No. 275-324 100 k resistor, Radio Shack Cat. No. 271-045 40 Assorted Solder Lugs, package, Radio Shack Cat. No. 64-3029 Some assorted scraps of wire Power drill Solder gun Flatblade screwdriver At current Radio Shack prices, this project should cost you $5.76 to build two top-of-the line models! [tax not included] Assembly -------- Be sure to unplug the phone from the wall before going further! Take the plastic lid off the phone by unscrewing the two screws on the bottom. Now look at the cord that goes into the phone from the wall. You'll see four wires, a red, green, black, and yellow. The only two we will be needing is the red and green. Now unscrew the red and green wires from their bases. Touch the red wire to one end of the resistor and the green wire to the other end. Now plug the phone in and pick up the reciever. There should be no dial tone. If you get a dial tone, go back and check your procedures. If you don't get one, then continue. Next solder a lug to one end of the the resistor, and solder another lug to an end of a 4" piece of wire. Now solder the free end of the resistor to one pole of the switch. Next solder the correct end of the LED [check the poles] to the switch, and the other end solder to the free end of wire. Now screw one lug to the base of the green wire [make sure the wire is on it, too] and screw the other lug to the other base and corresponding wire. Plug in the phone, and pick up the reciever. You should get a dial tone, and by flicking the switch to ON, the phone should go dead and the LED should go on. If the LED doesn't go on, you've reversed the poles, so take it off and put it back on the other way. After you get it to work, find a position on the base that it can properly fit. Now drill a hole on the side of the plastic lid where it can fit the LED, and another one next to it to fit the toggle switch. Illus. 1 red/green base _______ lug | base | _ | in | _ resistor w /---<_ (_)phone(_) _>------/\/\/\/\/\-----\ i | |_______| | r | \ Illus. 2 ____ reciever e | \ | \--------------------------------(O)--------/ swi \-> __ LED tch front __ / /\, of --> / (__) | phone / _/ | (_/_____o=| <-- the "o" is the hole for the LED, the "=" is the switch hole. Insert the LED and switch through their corresponding holes, and place the lid back on the phone. Plug in the phone, and voila! Your very own Global Mute/ Silence Switch. --The Cruiser -3/15/87-