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RJ45 is used with ethernet cables in computer networking while RJ11 is used in connecting telephone units.RJ45 contains more wires than RJ11and RJ45 is physically bigger than RJ11 to accommodate the extra wires

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14y ago
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14y ago

An RJ11 connector is used for telephones, and an RJ45 connector is used for computer networks, and VoIP telephones. An RJ11 connector only has 2 pins, and an RJ45 connector has 8 pins.

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Q: What is the different between rj11 and rj45?
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Can you convert RJ11 into RJ45 If so What is needed?

No, a conversion can not be made due to the different size of cables that each terminal end uses. An RJ45 uses a Cat , 8 wire cable where as a RJ11 uses a smaller 4 wire cable. The sockets for the RJ45 will be too wide to allow a RJ11 connector to securely connect to it.


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RJ11 and RJ45 are the names for the terminators at the ends of the cables. RJ11 is the 2 pair (4 wire) terminator used for telephones. RJ45 is the 4 pair (8 wire) terminator used for ethernet cable.


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