T568A vs T568B - what's the difference and how to test patch leads.

Рет қаралды 124,556

4 жыл бұрын

Networking patch cables and RJ45 connectors use two different colour codes. We take a look at the difference between T568A and T568B and how to visually identify the network colour code being used.
We also show how you can test an ethernet patch lead using the Patch App & Go tested featured in this earlier video. • Can this RJ45 continui...
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Пікірлер: 67

@eddprice4571 4 жыл бұрын

Great video Gaz 👍 very interesting and useful

@drummerbod 4 жыл бұрын

Great vid. No need for crossovers anymore Not used one for nearly 20 years as network equipment is auto negotiate. Never mix 568a with 568b. Always use 568b in new installs.

@LogicEyes 3 жыл бұрын

Thanks for the information! ;)

@house9850 2 жыл бұрын

Auto MDI-X is a wonderful thing

@tombruton 2 жыл бұрын

Sparkies doing data cabling often a recipe for disaster

@bobbymcbee1973 2 жыл бұрын

Glad to see your description of a crossover cable is exactly correct. They so many videos simply designate a 568b as a crossover cable. As you state a crossover cable must be type a on one end and type b on the other to affect a crossover of the signals. Thanks for getting it right.

@guffermeister 4 жыл бұрын

Technically you are correct... only 2 pairs are used for 10 or 100 mbit networking. If you are at gigabit it uses all 4 pairs. 100mbit uses the unused pairs for PoE. Gigabit uses the same pairs but because ethernet uses differential signalling it still works. Also don't bother with cross over cables. Auto cross over (MDI/MDX) is part of the gigabit standard but many older but newer gigabit devices will swap around as required.

@Bari_Khan_CEng_CMarEng 2 жыл бұрын

Great video as usual, and exactly what I was looking!

@Rainbowhockey 3 жыл бұрын

Despite BT (and others) marketing their supplied devices as "Hubs", that's a specific term which relates to a particular type of networking hardware. A lot of people say "hub" when they actually mean something else. In this case the BT "home hub" shown is actually a Modem/Router. It's also worth clarifying when you say it doesn't matter what T568 standard you use, that is as long as you choose the same on both ends of your cable.

@James-dv1df 2 жыл бұрын

Technically it's not a hub at all and a router with an integrated network switch. Hubs were used before network switches became standard. Hubs have not been used since the 90s Switches learn where the hosts are connected e.g. which host is attached to what port. while hubs were a dumb devices that would forward everything on each port

@rasmaven7271 2 жыл бұрын

That was a perfect explanation. That helped me.

@RWATraineeElectrician 4 жыл бұрын

Great video, thanks for sharing 👍

@EF-Electrics 2 жыл бұрын

Found it very useful thanks, subscribed.

@Mike_5 4 жыл бұрын

Great crossover video into networking

@rustcoal 14 күн бұрын

As a computer scientist I agree with the information in this video

@leadman70 Жыл бұрын

Great video. Answered all of my questions. I don't need to watch another video.

@phillychannel394 2 жыл бұрын

IDK but 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?

@triplebasic 2 жыл бұрын

I'm based in the US and I've only ever used the B method. Also, it's a pricey little kit, but the RW Certifier is a great tool. I'm not exactly sure how I would feel having to use my phone when checking my cables.

@MrNoobed 2 жыл бұрын

If you want a higher density patch panel without going all the way to a rack mount unit, you can get a '66 block' mounting for 8p8c/ethernet jacks. They will actually be 110 blocks but you can mount it to a wall the same way you mount a 66 block. I think it's like 10 ports.

@gbelectricks 4 жыл бұрын

Have you got a link to that tester? That’s a nice bit ok kit👍

@davidroche6973 4 жыл бұрын

Very handy vid 👍

@davepusey 4 жыл бұрын

Pretty much everything does Auto MDI-X nowadays, so no real need for crossover cables any more. At work we also have a convention that all crossover cables are red.

@guffermeister 4 жыл бұрын

Auto MDI-X was brought in with gigabit as part of the standard

@jamesrose6751 2 жыл бұрын

We also use red for xovers 😀

@James-dv1df 2 жыл бұрын

As a Cisco network engineer i have seen instances where disabled on the network switches. I think it can avoid loops in the ethernet topology as you then can't hook a switch to a switch so easily however a property configured network should be running spanning tree so don't thinks it's a brilliant idea

@James-dv1df 2 жыл бұрын

@@jamesrose6751 we use yellow however have not used a crossover for a while

@marksterling8286 2 жыл бұрын

Good video well explained but not sure why building a crossover cable all installs should be straight through as switches have had MDI-X for a long time.

@Doctrtony 2 жыл бұрын

I always do B, idk why but that's what's hardwired in my brain lol

@joelrggizmo1373 2 жыл бұрын

Does POE power always pass through the same pins T568a vs T568b,

@acelectricalsecurity 3 жыл бұрын

This could be nonsense, but someone said the A was America and the B was Britain, I always use the B version

@orestesdd 21 күн бұрын

How can I identify if my jr45 jacks in my new home are set to T568A or T568B. I took a picture of one of them, but I can't tell anything from the picture. I ask this because I may have to re-do all of them (about 8 or 10) and I don't know how much spare ethernet cable I will have inside the wall. If it is not much, I have to be very careful when I wire the cables with a new and better jr45. Thank you.

@lewisf18 2 жыл бұрын

Gaz looks like he has a ponytail in the cover photo to click on. Its that "Fixx" squiggle logo behind his head which makes it look like this.

@owent2032 2 жыл бұрын

A for Australia 👍🏽

@jamesrose6751 2 жыл бұрын

I'm in Australia, and use A 👍🏽

@brentwilliams191 3 жыл бұрын

Crossover cables are still used in Industry devices to directly connect to a PC

@efixx 3 жыл бұрын

Thanks for the insight

@rosslomath 3 жыл бұрын

What are the t&c of the app? Or are we signing up for more data collection from yet more companies.

@efixx 3 жыл бұрын

The app just needs Bluetooth no sign up etc

@rosslomath 3 жыл бұрын

@@efixx thank you for the update, privacy should be important to everyone but it seems tech companies are staring to encroach beyond respectable means. It seems people these days will happily give away their bank details to be hip and trendy.

@efixx 3 жыл бұрын

And very few folks read the terms.

@Mrhvac 3 жыл бұрын

Hello efixx. Can you please tell me how you were able to display your phone's screen on the main screen of the video? Or, can anyone else tell me how that can be done easily. Thank you very much.

@efixx 3 жыл бұрын

Easy way is just to screen record your screen and drop in to the video in edit. - does this help?

@Mrhvac 3 жыл бұрын

@@efixx okay. That's what I do now. I thought maybe you knew of some new super cool way of doing it. Thank you very much for the reply

@_Steven_S 4 жыл бұрын

That's ok if you're happy with a max link speed of 100mbps. If you want a gigabit link speed, cross the other two pairs too. So T568B would be G+w, G, O+w, Br+w, Br, O, B, B+w on the far side.

@Mike_5 4 жыл бұрын

or move to fibre?

@timearp8185 4 жыл бұрын

@@Mike_5 Moving to fibre requires significantly more skill and tools to terminate though. Then you also need more expensive equipment to connect to. Not a problem in a business environment but probably too expensive for a residential setting.

@customcreativesolutions9982 4 жыл бұрын

Just be clear you mean a cross over cable here? As others have said cross over cables are redundant these days as switches handle all the auto negotiation etc

@timearp8185 4 жыл бұрын

@@customcreativesolutions9982 No, fiber optic. It doesn't offer any benefit though as ethernet can handle significant data rates. You'd be better off paying for a proffesional data cabling company doing the work and carrying out proper certification and testing of each cable/connection.

@customcreativesolutions9982 4 жыл бұрын

@@timearp8185 Sorry Tim that reply was meant for @Steve S

@koenbrouns6241 2 жыл бұрын

Are you absolutely sure a 568b cross-over is the same as 568a straight ? I found something different on the internet.

@ONormanO 3 жыл бұрын

I all ways made sure both ends had the same color code, workes fine..

@andrewjanssen9078 Жыл бұрын

Around Canada, it seems to depend if you're a telecom guy or an electrician. Electrician did the work, it's A. Telecom tech did the work, it's B. Crossovers in walls make me cross.

@michaelhicks8603 2 жыл бұрын

Most nics will automatically adjust tx and rx, so xover is not really needed anymore

@RobCCTV Жыл бұрын

Type B might be the most common type of connection, but for any new installations, type A should be used. Type B is dominant in America because AT&T used it as standard.

@brentwilliams191 3 жыл бұрын

Just wondering why you didn't just show the Full 10/100/1000 Mbit crossover layout, so all crossovered

@house9850 2 жыл бұрын

Auto MDI-X

@Scorpio_1974 3 жыл бұрын

You do it so many times you can just do it on auto without even thinking when making a cat 5,6,7 or 8 soon 9

@GARRYEASTON 2 жыл бұрын

I sometimes wonder if putting video’s like this out there for all to see is hurting the trade or helping the trade. I prefer to see the knowledge passed on to others in the trade. So we can make a living from it.

@lunchbox1553 Жыл бұрын

No video like this will hurt your trade. It is for people who want to either learn more in their trade (although seems like you should already know something like this if you are in the trade), or it is for people who want the knowledge to do it themselves and nothing more. You can still prey upon those who think they don't have the self confidence to do this themselves.

@f36443 Жыл бұрын

@@lunchbox1553 In a world where i have to show people how to recover their itunes passwords, cabling RJ45 makes you a wizard. We're fine.

@imeldomarcos4126 Жыл бұрын

People rarely use A.

@bourneelectricalable 4 жыл бұрын

I was always under the belief that a was American and b was British. Have I believed this wrongly for years?

@Ressy66 4 жыл бұрын

Not, the standards are derived from USA, both of them, however A is only recognised by US Govt they dont accept B type, I think its an AT&T design. A is also the standard in regs for Australia, New Zealand, and a few other countries

@efixx 4 жыл бұрын

Thanks for the insight