RJ45 Pinouts: Explaining 568A, 568B, Ethernet pin connectors, and crossover cables

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  • เผยแพร่เมื่อ 7 ม.ค. 2025

ความคิดเห็น • 58

  • @cps2175
    @cps2175 5 ปีที่แล้ว +7

    I feel like I've learned more in eight minutes than I could in a full hour's course on this subject. You're a great teacher, Jim. Thanks for such a clear and concise video.

  • @Afrocanuk
    @Afrocanuk ปีที่แล้ว +1

    So far the best video on this topic.

  • @solosymphony
    @solosymphony 10 ปีที่แล้ว +9

    Thank you so very much for this video, it was very informative and covers all the main details i've been trying to come to grips with understanding the topic.

  • @EJOsis
    @EJOsis 12 ปีที่แล้ว +7

    The reason the cable pairs are twisted is to reduce cross talk (when current flows down a wire a wire in parallel will have its electrons move also) Each pair is twisted at a different rate to reduce it further. But to get the benefits, a circuit needs to be on same twisted pair. If you don't , you will increase your signal to noise ratio and reduce the quality of the connection. The longer the cable the more noticeable the effect.

  • @markw.schumann297
    @markw.schumann297 6 ปีที่แล้ว +5

    Thank you for this, Jim. I haven't run cable for fifteen years or so and I needed a refresher on the 568B standard.

    • @kurttrimas8768
      @kurttrimas8768 4 ปีที่แล้ว

      Excellent Video for learning cabling pinouts, patch and crossover

  • @noelwhittle7922
    @noelwhittle7922 10 ปีที่แล้ว +6

    thanks Jim, very useful info for where I'm at right now on the learning curve.

    • @PizzaPowerXYZ
      @PizzaPowerXYZ 5 ปีที่แล้ว

      Same, but my motherboard uses 568a instead of 568b and I was hoping it could do crossover and do this...
      Router 568b>ethernet 568b> motherboard 568a

  • @torianoevans
    @torianoevans 6 ปีที่แล้ว +1

    Once again, the best explanation yet! Thanks!

  • @carlosmalovini
    @carlosmalovini 5 ปีที่แล้ว

    Sr. you are a extraordinary teacher. Thanks!

  • @CableSupply
    @CableSupply  12 ปีที่แล้ว +4

    Yes, they are 8P8C connectors. But because they are used with RJ45 jacks, it's common slang to refer to them as "RJ45 mod plugs".

  • @lakostakis
    @lakostakis 9 ปีที่แล้ว +3

    Thanks so much for this! Love your channel, keep it up.

  • @flashcraft
    @flashcraft 13 ปีที่แล้ว +2

    Great explanation, very clear. Thanks again.

  • @kevinswartz
    @kevinswartz 9 ปีที่แล้ว +1

    Ahhhh... now I get it. NOBODY else explains that it's for patchover cables why there is an A and B standard. Thanks

  • @chemyguy7283
    @chemyguy7283 4 ปีที่แล้ว +2

    Thanks very great information wish i would of seen this before i started to run my own wires. That explain why im not getting gigabit light going on on the back of my switch. I put wo,o/wb,b/wg,g/wbr,br. Your video is very informative thanks

  • @calisurfer619
    @calisurfer619 9 ปีที่แล้ว

    Great video, makes so much more sense now!

  • @Alex-eq7uh
    @Alex-eq7uh ปีที่แล้ว +1

    very valuable info and well explained!!

  • @CableSupply
    @CableSupply  12 ปีที่แล้ว +4

    Yes, technically you could arrange the colors in any order and it -would- work as long as it's the same on both ends.
    The color order exists to provide common ground for human technicians and help them tell what each wire does. So, if you terminate in some random order, what about the tech that comes after you? They'll assume a standard that's not there. And they may not be able to look at your cable to check; it could be really long, or one end may be terminated on a jack they can't get to.

  • @Nyax4Real
    @Nyax4Real 8 ปีที่แล้ว +1

    Well explained so clear. Thanks keep it up

  • @stoneledgetinyhouse
    @stoneledgetinyhouse 4 ปีที่แล้ว +1

    First thumbs up? in 2020 😷👍😉 Great explanation! I am currently wiring up my Tiny House for Cat6 -Computers & POE Security cameras 👌

  • @josephhenry5832
    @josephhenry5832 3 ปีที่แล้ว +1

    Excellent video!

    • @CableSupply
      @CableSupply  3 ปีที่แล้ว +1

      Thank you! Cheers!

    • @CableSupply
      @CableSupply  3 ปีที่แล้ว +1

      Thanks for subscribing !!!

  • @barnny7383
    @barnny7383 9 ปีที่แล้ว

    Very well good introduction! well done!

  • @phillychannel394
    @phillychannel394 2 ปีที่แล้ว

    IDK but aside from T568B of A, I have been using non-standard color coding when setting up LAN ang it's working well. I just made it sure that whatever the color combination on one end is also the same on the other end. Is there a special feature between the copper wire inside a Wh-Or, Or and the Wh-Gr, Gr plastic cover with regards to Transmit and Received function?

    • @CableSupply
      @CableSupply  9 หลายเดือนก่อน

      Computer network cable is designed to be used with the color code. The reason why is because each pair has a particular twist to it. It works best when individual wires are used together in a pair. It is an engineering thing. Less cross talk. The problem is when other techs need to troubleshoot your cabling, they will have difficulty and understanding what you did or how you cabled. to answer your statement that your "network is working well" that may be, however, when you get into the longer distances, it may create problems with your computers and you're switching routing equipment. The computer may be sending out the packets over and over again because they're not getting through on a consistent basis, the standards really do work well and my advice would be stick with them. I do appreciate the fact that you watch the video and wrote me comments. Thank you.

  • @ИгорьСтрижевский-э3г
    @ИгорьСтрижевский-э3г 9 ปีที่แล้ว +1

    very helpfull video!!! many tnx!!!

  • @Boxpeoplez
    @Boxpeoplez 8 ปีที่แล้ว

    Thank you, awesome stuff always !

  • @getachewbabulo29
    @getachewbabulo29 5 ปีที่แล้ว

    excellent tutorials thank you sir

  • @lagacoeh
    @lagacoeh 8 ปีที่แล้ว

    Loving This Channel...

  • @shawomroy6687
    @shawomroy6687 6 ปีที่แล้ว

    Good job explaining

  • @bestofthebest1536
    @bestofthebest1536 9 ปีที่แล้ว

    I GOT A DVO JACK 568A(WALL PLATE)- WHERE WE USE PUNCH-DOWN TOOL AND OTHER END WOULD BE ETHERNET CONNCTER WHICH WILL GO INTO THE SWITCH..
    WHAT WOULD BE THE COLOR CODE TO TRAVEL DATA THROUGH?
    let me know please thanks
    \

  • @danielpadilla794
    @danielpadilla794 8 ปีที่แล้ว

    Great video!! thank you very much!

  • @liamcollins8692
    @liamcollins8692 5 ปีที่แล้ว

    Awesome video

  • @seus1985
    @seus1985 8 ปีที่แล้ว +1

    thank you very helpful..💪

  • @AxeMastersinc1
    @AxeMastersinc1 8 ปีที่แล้ว +1

    Thanks, do I need a crossover for a UPS?

  • @robertknull456
    @robertknull456 3 ปีที่แล้ว

    I am using an old router as a relay / extender. Do i need a crossover cable to connect the 2?

    • @CableSupply
      @CableSupply  9 หลายเดือนก่อน

      Like devices need crossover cables. For example, computer to computer not going through a switch would need a crossover cable. Older switches, and routers need crossover cables when going from switch to switch. if you're cable runs are more than 100 m you'll need a switch or an extender. That's why network design is so important. Thank you for watching my videos. Very much appreciated.

  • @doctordhd
    @doctordhd 4 ปีที่แล้ว +1

    Excellent! Thank you!

  • @skydj100
    @skydj100 8 ปีที่แล้ว

    Wow!! You are amazing!!

  • @Ichijoe2112
    @Ichijoe2112 10 ปีที่แล้ว +1

    @6:37 Can this Device change a older, and useless 20m's of Crossover Cabling. into a a Straight-Though? So I can connect my mini HTPC up via its Ethernet Port, form my Router? Unfortunately the area I reside in is littered with 2.4Ghz Interference, and although the Router is in fact capable of broadcasting in the 5.8Ghz Range. None of my actual end devices are that sophisticated.
    Sure I could.. Buy a Crimper, and some Jacks and do it by Hand.... But it's not like Cat-5 Cable costs the World. And by the time I factor in the cost of these One-time use Tools... I'd have been better of just buying a whole new Cable.
    Or so it seems to me.

    • @benjwgarner
      @benjwgarner 5 ปีที่แล้ว

      Yes, if you plug a crossover adapter into a crossover cable it will act as a straight through cable.

  • @ozzman39
    @ozzman39 10 ปีที่แล้ว

    Automatic crossover was introduced in 1998

  • @bunnandjenn9405
    @bunnandjenn9405 10 ปีที่แล้ว +1

    thank you

  • @nkthekiller
    @nkthekiller 12 ปีที่แล้ว

    ok, I am so confused...its all copper, so, if the wires match on both sides...wouldn't it work...?

    • @zaheerulislam1899
      @zaheerulislam1899 7 ปีที่แล้ว

      Captain John McMillan yes these are copper cables but not interconnected ( either from wall side and penal sude) so have to be contacted in right order

  • @muhammadyounas7249
    @muhammadyounas7249 6 ปีที่แล้ว

    Hi,sir i explained you my old modem is configured to WiFi router it mean my old router is configured to WiFi access point simple word how to used cable straight & cross cables connectors RJ-45 my cable is CAT 5e replay me ?????

  • @serbiadance838
    @serbiadance838 10 ปีที่แล้ว +1

    Thanks!!!!

  • @benjaminjones4914
    @benjaminjones4914 3 ปีที่แล้ว

    ⚡️

  • @zaheerulislam1899
    @zaheerulislam1899 7 ปีที่แล้ว

    v nice

  • @jobicek
    @jobicek 12 ปีที่แล้ว +1

    It's not a RJ45 but a 8P8C modular connector.