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RJ45 splitter question.

Discussion in 'Networking' started by ingeborgdot, Mar 31, 2009.

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  1. ingeborgdot

    ingeborgdot Thread Starter

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  2. Gr3iz

    Gr3iz

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  3. ingeborgdot

    ingeborgdot Thread Starter

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  4. Gr3iz

    Gr3iz

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    Ahhh! Telephone only uses 2 wires, one pair. Cat5 or Cat3 (typically used for telephony) can be used for 4 lines. There are two different ways to wire phone jacks, using 1 pair or 2. The latter would be for two-line (analog) phones. Two-line digital phones can use 1 pair. Normally a single pair is all you need.

    The device you reference may be overkill, depending on your actual application.
     
  5. daniel_b2380

    daniel_b2380

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    ingeborgdot,
    let's NOT confuse the numbers,
    what is commonly used with a telephone isn't quite what is used with an ethernet plug,
    they are really close, [one WILL go inside the other's plug], but it doesn't actually 'fit' because they are two different sizes, one is just a bit smaller than the other, [the 'telephone' plug is the smaller one]

    http://en.wikipedia.org/wiki/Registered_jack

    http://en.wikipedia.org/wiki/RJ11,_RJ14,_RJ25

    http://en.wikipedia.org/wiki/8P8C
    [rj-45]

    what you're asking, on a telephone line, can you then plug two telephones into the one line with the device you linked to - yes
    BUT, they will still be on the same line, in the case of two telephones, if you are using one, and you pick up another, you can hear the other phone, both are on the same line, you can't say use one AND let someone else use the other to then call a different number,
    .
    what the description was stating of what you linked to was that you CAN'T use that device with an ethernet setup
     
  6. daniel_b2380

    daniel_b2380

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    gr3iz,
    all kinds of answers, huhh?
    big dicussion about something similar a short time back,
    .
    lot of people are using cat5 for telephone anymore, better cable, and in new construction, you can just make a bunch of 'pulls' and let the installers 'sort it out' later,
     
  7. Gr3iz

    Gr3iz

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    Yeah, it can be as simple or complicated as you want to make it ... ;-)

    I guess the price of Cat5 has come down enough, though we still use both in the office, 3 for voice and 5e for data. We've not made the "leap" to Cat6, yet. At this point it would be fairly expensive to replace the entire cabling plant! We're only using Gigabit copper in a limited area, and not all of the PCs even have a gig NIC.
     
  8. JohnWill

    JohnWill Retired Moderator

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    CAT5e is fully rated for gigabit connections anyway, so no need to go to CAT6 for that reason. :)
     
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