Windows 8 and 8.1 Forums


Using RJ11 cable for LAN?

  1. #1


    Posts : 241
    Windows 8.1x64 Pro

    Using RJ11 cable for LAN?


    Hi all, I want to know if this is possible. I have a home wired LAN and want to extend its reach to a far away room. This room happens to be already wired from the time I had ADSL. The cable is a a telephone cable with Rj11 male connectors at both ends that used to transmit the ADSL signal but now I'm not using it as I have cablemodem, and it goes from the place I have my current cablemodem to the room where I want to extend the LAN, so it'd be very convenient. My question is, can I use this cable so to avoid having to install a CAT6 ethernet cable? If so, I would need 2 male RJ11 to female RJ45 adapters/converters, does this exist? thanks

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  2. #2


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    RJ11 is a regular telephone line and has only 4 wires while RJ45 has 8 Wires. I am afraid you'd have to rerun it with a CAT5/6 cable.
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  3. #3


    Posts : 241
    Windows 8.1x64 Pro


    Yes I thought so, but posted anyway to make sure. Thanks topgun.
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  4. #4


    Covington, La
    Posts : 1,184
    Windows 7 HP 64bit, Windows 8.1 Pro w/Media Center 64BIT


    LAN cables (cat5/6) only use 4 wires out of the 8 but they are twisted in a manner that cuts down interference. That 2 pair phone wire is not twisted and won't work very well for data.

    Jim
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  5. #5


    Posts : 241
    Windows 8.1x64 Pro


    That's good to know Jim, thanks for the info!
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  6. #6


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    If you don't want to rerun the cable, you can try one of these from Netgear which use your current electrical wire:
    NETGEAR Powerline 500 Nano Ethernet Adapter Kit White XAVB5201100PAS - Best Buy

    NOTE: there's more expensise powerline which has transfer rate of 1GB
      My System SpecsSystem Spec

  7. #7


    Posts : 241
    Windows 8.1x64 Pro


    Yes, I've seen these, but I don't feel comfortable having data travel across the electrical grid, even though they use encryption. I will go with Cat6 cable, found these ones which seem nice.
      My System SpecsSystem Spec

Using RJ11 cable for LAN?
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