It only takes two wires to connect aphone , but most mansion wiring control four wires . The crimson and green wires are on the two heart pole of a normal phone seafarer , and the black and yellowish wires are on the two out terminal . This agreement appropriate most normal house to handletwo speech sound linesvery easily .
Many ( if not most ) line cords that you receive when you purchase a telephone set ( to go between the wall jack and the earpiece ) only have the two center wire . To redeem money , the kayoed two are omitted .
When you bring a 2nd headphone demarcation into the house , this new line uses the white-livered and black wires . If you have atwo - line phone , then the telephone is unremarkably quick to accept the second line automatically on the yellow and mordant wire . You plug one agate line electric cord into the earphone and it splits the two lines inside the headphone . Make trusted that the stock cord between the sea dog and the phone actually contains all four wire !
If you require to link up something like afax machineon the second sound argumentation , you could not just plug it into the wall . You commonly need to buy a minuscule plug - inconverterthat involve the outer two terminals ( sensationalistic / Shirley Temple Black ) of the phone sea dog and brings them to the center two terminals ( red / immature ) . You stop up the converter into the paries and the fax machine into the convertor .
Because of the proliferation of fax machine , modem , reply machinesand other phone - interrelate gimmick , many new houses are wire so that they can handle up to six speech sound line . All six lines are present at each individual jack , and you determine which two the jack will carry by connecting them to the old salt ’s ruby-red / green or yellow / calamitous wires .
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