T568a vs T568b - Which to Use!

[@thomasmaia5253]

I tried so many different websites and documents to define the different and you were able to explain in less than 2 minutes. amazing job! love your video.

[@trueCABLE]

Thank you for being a fan!!

[@omarelizondo8443]

I couldn't help but laugh in the end, this was explained without beating around the bush and answered all my questions. Perfect video.

[@prsguitars42]

5 stars.....this vid solved my confusion on the t568a !!!!! Kudos!!!

[@eugenew2]

I had remembered (maybe cloudy memory nowadays) T586a was used way back in the day. Where T586b had been tested to have slightly better signal isolation.

[@trueCABLE]

Hello Eugene! Yeah, way back in 2006 and prior, T568A was the suggested pattern, and T568B was the alternative. The reason for the two schemes has to do with AT&T and Bell both wanting their own schemes (go figure, right?). Anyway, T568A may still be required in rare cases due to legacy telephony requirements, but again that is rare. You can use T568A or B on your own accord as you desire. I have tested both schemes on the same cable, using the same keystone jacks, and the performance was --- get ready for it --- a draw. No difference. SO, unless you have a specific reason to use one over the other, just pick the one you like and stick with it. In my case, I use T568B because I happened to memorize that scheme first.

[@AlexRealAudioVideoStuff]

...and this is how I became an Internet Cable Expert....you really Rock! THANK YOU SO MUCH!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@trueCABLE]

Hello Alex! We are glad you found the video useful and are learning! Watch out, however. The moment you think you have it all figured out a nuanced situation will come along and up-end all your assumptions again. More learning! Installing structured cabling systems and terminating copper twisted pair Ethernet can become a complex topic and I am still learning myself. ~~Don.

[@AlexRealAudioVideoStuff]

Sound about Right!@@trueCABLE Thanks!

[@trueCABLE]

@@AlexRealAudioVideoStuff You are welcome, Alex, happy networking!

[@camerongray1515]

Here in the UK it definitely sees as though T568B is by far the most common, and I've even come across some network faceplates which only have the B colour codes printed on them, presumably to avoid confusion. Therefore I'd generally always use B for a new install, however, the other important factor is to match whatever standard is already in use for any existing network runs. If a building already has a bunch of network runs wired as T568A, then use the same for any new runs to avoid confusion!

[@trueCABLE]

Hello and that is sage advice! Glad you liked the video.

[@Germier84]

Simple, clear and informative in a short time, Perfect. Thanks

[@trueCABLE]

We're so glad this was helpful!

[@0lei3]

I was a noob before I watched this video. Thankyou

[@dhanajon5528]

Yooo are profile picture are the same??? been using since 5 years and ur the first same pfp as me ive seen lol

[@HeathJ.Ledger]

Literally went out of my way, I found this video in a website so I came here to give these guys a thumbs up! Great video explaining and even giving your opinion to brush off any personal insecurities a noob like myself might have. Thank you

[@trueCABLE]

Thank you for giving us a thumbs up! We're so happy to hear that we were able to help you out and ease your mind!

[@kenmunford4971]

precise, concise without the usual verbal diarrhea.this video is like a breath of fresh air THANK YOU

[@trueCABLE]

Thanks! I am all about minimizing diarrhea! :>)

[@namelessone5968]

I've been stressing at this for ages because of conflicting information...thankfully I saw your video.

[@trueCABLE]

Hello! I am glad I was able to put your mind at ease. I have a detailed written blog behind this video, where I even compare the performance between the two termination schemes. Spoiler: No difference. See it at www.truecable.com/blogs/cable-academy/t568a-vs-t568b.

[@KevinRussellSpaceSimSTEAMphony]

So clear and making the distinction between 'straight through' vs. 'crossover' was helpful reminder too. Saved me from throwing out a 'crossover' I just found when year end cabling cleaning (I was transposing in my head to null modem :) Now I'll go look up that old definition.

[@trueCABLE]

Sometimes all we need is a little refresher ;) We're so glad you found this helpful!

[@SirAnthonyHopkins-b6h]

Perfectly explained in under two minutes... Well done Sir

[@trueCABLE]

Happy to help, thank you!

[@shawncasey9995]

Now I know, thank you! I was like "Why can't we just use the same pattern on both ends without following the T568A or T568B?!" Now I got the answer ! Thanks again

[@trueCABLE]

You are welcome! Glad you enjoyed the content.

[@MrKen-wy5dk]

I wish you had included a downloadable graphic that you mention at 0:46. Great video, though.

[@trueCABLE]

Hello Mr. Ken. Great idea! If you look at the corresponding blog post, you can find a graphic there! We include a link to it in the video description. We hope this helps.

[@MrKen-wy5dk]

@@trueCABLE I finally found it after looking two more times through the description. Exactly what I needed. My apologies for my bad eyesight.

[@trueCABLE]

@@MrKen-wy5dk Hello Mr. Ken. No apology necessary!

[@Dustin_Hruzek]

The exact information I was looking for with facts and no over all opinion. Thanks.

[@trueCABLE]

Wonderful! Glad we were able to help.

[@fj5052]

Thank you so much for a simple, direct and concise video!

[@trueCABLE]

Glad we could help!

[@yewcheongchow5540]

Very clear explanation of the difference between T586A and T586B. Thank you!

[@trueCABLE]

You are welcome! Please subscribe to our channel if you have not done so yet. We have quite a bit of upcoming videos we just shot we think you may enjoy!

[@alphathemis]

Perfectly explained. Not giving any confusing extra information. Easy peasy. Thank you so much @trueCABLE 👍

[@trueCABLE]

Glad it was helpful!

[@akira5982]

Your a legend mate made it super easy to understand for the peeps that dont know jack about networking like me, every other video is so confusing thanks mate 🙋‍♂️

[@trueCABLE]

Thanks, Akira! We do our best to make this stuff understandable!

[@toarvindh]

I was thinking the same and tried to see on the internet but they are being very complicated in explaining, You kept it short and sweet in < 2 min Awesome 👏🏻👏🏻

[@trueCABLE]

Thanks Arvind! We try to keep this stuff easy to understand. It can get complicated quickly.

[@thegees]

i like the way you say 'bang, now they can talk' so i am going to use the same as you

[@trueCABLE]

HAHA! I am glad you found the content useful. Have a great rest of your day.

[@SittingTheApple]

Simple and to the point. Love it!

[@trueCABLE]

We are glad you enjoyed the content and found it useful!

[@dono42]

While I agree in general, I wish you would have talked about (NEXT) headroom. Compared to T568A, T568B has slightly greater headroom, which becomes more important in longer cable runs.

[@trueCABLE]

Hello dono! You are in luck, the written blog contains the information you seek. All of our KZbin videos are actually supplementary in nature and embedded in very detailed and quite informational blogs contained in our Cable Academy on our website. As it turns out, the headroom performance between T568A and T568B is identical. This is at full length permanent links of 295 feet. Please see www.truecable.com/blogs/cable-academy/t568a-vs-t568b.

[@dono42]

@@trueCABLE Hmmm... the blog post shows T568A headroom 7.3 dB and T568B headroom 7.6 dB. This is a 4.1% difference. At 295 feet length I would not count this as insignificant.

[@trueCABLE]

@@dono42 Hello dono! That .3 dB difference is not significant. It is nearly within the tester's accuracy limits. In fact, unplug the same exact cable, plug it back in, and test again, and you will find the results will change a bit. Heck, even turning the tester off and then back on and pressing the test again will reveal a small change. Usually, .1 or .2 dB change up or down. For all practical purposes, I only started taking notice of differences exceeding .5 dB or even a full 1 dB.

[@harryfritz8879]

This is one of the best videos on understanding how to make cat5/6 cable. Very simple to understand. Thank you.

[@trueCABLE]

Thanks for the feedback. We are glad to hear this video was helpful!

[@VermontBlogger]

Feels like such a no brainer type question, but it always confuses me. Thanks for the great, and concise video in answering the question! :D

[@trueCABLE]

Thank you for being a fan! We're glad we were able to help!

[@steveofsd]

I've been trying to figure out which do I have, ...A or B, after 5+ videos this is the best so far. So thumbs up, way up. Now why there're 3 gave thumbs down? I've seen much worst and never give thumb down because it takes effort to create a video. Anyway thanks, and now I'm going to do some Cat6 wiring.

[@trueCABLE]

Thank you very much for the kind comments! We really do our best to explain this stuff to people in a way that is understandable. As for the folks who gave "thumbs down" I would like to think those are the very small number of people responsible for "WARNING" labels on hammers...

[@InfinityDejavu]

thanks for this im looking a more clearer explaination of what crossover about cable thanks again.

[@trueCABLE]

Hello! You are welcome! We are glad you found the content helpful.

[@jaylord55]

tyvm i have been trying to figure this out some of the cables in my house are 10+years old and are all cat5e cable but where wired in T568a but i have since moved where the router is in the house and was planning to cut few of the long runs in the middle i checked the ends fount out they where T568a but for all the other runs in the house are running T568b didn't know the difference just wanted to check if i could just rewire the split with a or if i had to redo both ends.

[@trueCABLE]

Hello! That sounds like a mess! If you restore the original color code pattern at the split, then that is the way to go. All parts of the cable run, end to end, MUST be using the same color pattern or you will end up with a cross-over cable. Alternatively, this might be an opportune time to pull the Cat6 U/UTP Riser using the existing Cat5e as the "pull string". This will ensure you are ready for 5Gbps Internet, which is already being deployed in some areas of the USA! As to either T568A or T568B--pick one and and stick with it. I personally use T568B since I standardized on it after memorizing it. There are no performance differences.

[@jaylord55]

@@trueCABLE yea well i got it working for now without the hassle of re running the wires and ripping out a wall or 2 as when we put this wire in the first time it was all tied up with cable loops every 3-5fee

[@trueCABLE]

@@jaylord55 Hello again. I am glad you got it figured out. I completely understand about not wanting to rip out walls!

[@Jonathan-jo2xu]

As I am going to wire my first cable, i 3ncounter the 2 options and i thought to myself "it shouldnt matter what colors I use as long as both ends matchbulb the same on each end"just now and looking at the two options I began thinking the same thing, "⁷it doesn't matter what color scheme I use al as long as both ends are the same, right? 👍 Thanks for the quick clear advice

[@trueCABLE]

Hello Jonathan! Well, it would seem that way, right? However you cannot use any color order you wish and maintain electromagnetic balance in the cable. Use either the T568A or T568B color pattern (it does not matter which) at both ends but don't invent your own color code as the pairs are twisted together to maintain communication. If you invent your own color code then the pairs are not going to pass data.

[@shahinhoseinkhah9348]

I use straight through cable on pc to pc conection and it works fine is there any particular instance that really nead cross-over cable??

[@trueCABLE]

Hello! Cross-over cables are pretty rare these days. If you see a cross-over cable, typically its in a scientific or industrial application with older equipment that requires it. For the most part, all modern networking applications use straight-through Ethernet cable. We hope this helps!

[@mikkelgraff6879]

The reason you can use straight through cable for almost every connetion is because of the auto MDI or auto MDI-X feature. It detects what the cable is and the device in the other end and changes its own pin configuration to what is needed for the connection to function. There are still cases the require crossover cables, but i belive it is mostly in scientific and industrial applications.

[@AMx201]

I just bought CAT6 and the cable only giving 100Mbps so I suspect the shop didn't do the wiring job well, I'll go tomorrow to ask them to wire the cables exactly like this, but may I ask you, if the order is incorrect will it result in 100Mbps link speed or something different? How can I know if the wiring is successfully done? If it gives 1000Mbps link speeds it means everything is good?

[@trueCABLE]

Hello A. Sorry to hear of your troubles! I would agree that the workmanship on your cables is bad. The must likely culprit is the terminations. If one out of the eight conductors is not connected and making contact properly, then your Ethernet switch cannot establish 1000Mbps communication. Your switch dropped back to 100Mbps as a result. The wiring order is likely correct, but some Ethernet switches will try and establish communications regardless of how bad the cable and/or terminations are. You can discern proper wiring order with a simple wire map tester available on Amazon for less than $20. If you wish to find out if your cable can perform at the Category and speed you paid for, that will take an advanced test instrument that costs $2,000 minimum (Fluke LinkIQ).

[@TRE4RAISEDME]

What copper cable categories do they fit into

[@trueCABLE]

Hello! T568A and T568B color code patterns are used for Cat5e, Cat6, Cat6A, and Cat8. Hope this helps!

[@davidlyle9645]

Thanks for the simplification that both are "straight-thru" cables and can be paired with other "straight-thru" cables, regardless of an "A" or "B" 'whatever'!!

[@trueCABLE]

We are always here to help explain things as easily as possible! Thank you for tuning in!

[@rickyearout9421]

Dilemma I have RJ 45 network testing equipment, installed CAT 5 in several rooms in my house, they all work. 568B assignments on cables, same on keystone jacks. It has been 15 years since I did this but followed the diagram from my networking tool kit. Making patch cables is easy enough, wall jacks are a little harder doing it in pairs but I have done it successfully many times. Ran 100 feet to another bldg. installed keystone jacks, tested as NO CONNECTION- ZERO. Used end terminator of tester and known good parallel plugged into keystone jack to end tester, did same thing at house with parallel cable and main testing unit. test cables are 568B parallel and test 100% good. all 8 lights. Both keystone jacks are 568B, I don't understand why I got nothing, not one good connection. Figured wire was broken inside jacket from a hard pull through conduit. Bought new 100 feet CAT 5, laid it on the floor and punched down two keystones 568B on the 100 foot cable. Plugged the short parallel testing stubs into tester and end terminator and get NO CONNECTION- not even one light. Took apart one of my unused working keystone jacks in the laundry room. It is 568B so other end is 568B. I used it years ago and worked then. All other keystone jacks upstairs and downstairs are 568B and have routers, printers, PC's and they work great. What gives? CAT 5 should reach 300 feet. I am installing 80 feet, so distance can't be an issue. I am obviously doing something wrong. Don't pin assignments at each end of the 568B keystone basically make it a straight through run anyway? Matching 568B on both ends of one wire should test good right? If you know the answer please send to [e-mail] I wanted to do this for daughter's birthday so she has internet in her apartment now she lives with us, again. Thanks to all who can help Rick

[@trueCABLE]

Hey Rick! Since these are not our accessories, or cable we can not help troubleshoot 100%. That all said, I would suspect that you are not punching down the wires fully. Best guess. Hope this helps!

[@flipliip]

THANK YOU!!! :D short, simple and amazingly explained :D

[@trueCABLE]

Thanks! We aim to please. Or, please to aim. Either way, we do our best! :>)

[@TheBrandonFactory]

I understand the need for standardization out in the "Wild" but, if I was making my own cable for my home setup, it doesn't matter what pattern i put the wires in as long as they are identical on both ends (provided they are going through a router or switch). Am I understanding the concept properly?

[@trueCABLE]

Hi there! This is a great question. You are not able to put the colors into any order you wish, even if they are the same at both ends. You have to use either T568A or T568B. It does not matter which one, but pick one and stick to it. I typically use B. If you do not, you will end up electromagnetically de-coupling the pairs improperly at the connector. This will result in a non-performing cable run. Hope this helps!

[@TheBrandonFactory]

@@trueCABLE Great Info. THANK YOU!!

[@James_Knott]

Make sure you don't split the pairs. The pairs must be maintained or you will have problems.

[@James_Knott]

I prefer to use A for 2 reasons. It matches the telecom cabling (my background is in telecom) and I find it easier to identify blue & green wires. With some makes, it's hard to tell green from blue and with A the orange helps keep things straight. I believe B originated with StarLAN, which evolved into 10baseT. I've also noticed some premade cables are neither A nor B. However, as long as they're wired straight through, they're fine. Also, these days you generally don't need crossovers to connect 2 computers as 1 Gb and some 100 Mb NICs can automatically sort out the pairs.

[@mikkelgraff6879]

The automatic figuring out the pins and what device is on the other end so the nic can change from A to B or B to A if needed is a feature in 99% of modern networking gear. I have never seen a device being sold new today without the auto mdi or auto mdi/x feature i belive it is called.

[@James_Knott]

@mikkelgraff6879 My first experience with Ethernet was back in the days of 10base5 "thicknet". I have here a 10 Mb hub, not switch, that most definitely won't auto detect. Auto detect didn't become available until some time after 100 Mb switches, so only later models had it. Of course, any Gb switch can do it. Also, at 1 Gb, all 4 pairs are used.

[@James_Knott]

@mikkelgraff6879 My first experience with Ethernet was back in the days of 10base5 "thicknet". I have here a 10 Mb hub, not switch, that most definitely won't auto detect. Auto detect didn't become available until some time after 100 Mb switches, so only later models had it. Of course, any Gb switch can do it. Also, at 1 Gb, all 4 pairs are used.

[@maxamps45]

in my experience, if you're using very old cable. 568A/568B really makes a difference than having just match the color on both ends. if you use straight with the same colors at both ends especially a longer cable. the auto negotiation on windows systems will have fluctuating speeds. but, if you use the standard cabling systems 568A/568B set forth by standards then, the bandwidth will be consistent. I read somewhere it has to do on how electrons travel and induce EM interference on the wires. with the standard 568A/568B, this wiring scheme can help mitigate and cancel the generated interference out. if you're using new and quality cables then the color scheme really doesn't matter.

[@trueCABLE]

Hello and thanks for your insight. Indeed, if you follow T568A or T568B and use it consistently the performance is the same. Simply hooking up the colors to be identical at both ends--like for like and not paying attention to the approved pattern--won't work well or at all, since the T568A and B patterns preserve electromagnetic coupling. If you violate the color pattern, you will de-couple the pairs at the connector and end up with poorly performing (or non performing) cable runs.

[@robdahlgren0506]

Thank you so much for this! All of these articles I was reading were telling me the difference between A and B, and I just couldn't understand how they were different except for color.

[@trueCABLE]

We're so glad you got the answer you needed! Feel free to reach out if you ever have any questions.

[@g0dr0ck]

I heard that T568b was less susceptible to interference because the twist rates are different on the send and receive pairs and that's why the industry has largely accepted b as the standard. Also most modern NICs will auto detect send and receive and correct it at the device so modern computers don't require a crossover to communicate and you can even use a crossover cable incorrectly with no real issue. The only time I've used crossovers is when talking to older industrial controllers directly, but that was 10+ years ago.

[@trueCABLE]

Thanks for pointing this out Andrew. Many modern switches and NICs have auto MDI/MDX. Which auto-corrects for cross-over cables. As for electrical performance, I have tested both T568A and T568B at 295ft with Cat6A on a Fluke DSX-8000 and have not seen any significant differences in performance. That said, I will not discount that T568B may have some sort of EMI advantage at the connector that I have not seen yet, but so far I have found performance to be identical. T568B became the more popular scheme as TIA has been recommending T568B for commercial installations for some time now. At one point, they were recommending T568A due to backward compatibility for analog legacy devices, but that was back in 1999 with the 568-B revision. Things have changed since then!

[@James_Knott]

Send and receive pairs are only with 10 & 100 Mb, as Gb and faster use all 4 pairs and are bidirectional. Also, with 10 & 100, on end's send is the other end's receive, so it won't make much difference whether A or B is used.

[@Revelations-cp6if]

I'm completely new to networking so please excuse my arrogance, but if you just needed two computers talking to eachother without a router, why exactly would you need a crossover? Love the video by the way.

[@trueCABLE]

Good question Michael! There are some PCs out there that have network cards that don't do auto MDI/MDX. In that case, a cross-over cable would be required if you don't have a switch/router handy. It is rare to see a cross-over cable used these days, however.

[@muzguz7276]

Good enough reason to stick with a as below: T568A wiring pattern is recognized as the preferred wiring pattern for this standard because it provides backward compatibility to both one pair and two pair USOC wiring schemes. The T568B standard matches the older AT&T 258A color code and is/was (?) the most widely used wiring scheme. It is also permitted by the ANSI/TIA-568-C standard, but it provides only a single pair backward compatibility to the USOC wiring scheme. The U.S. Government requires the use of the preferred T568A standard for wiring done under federal contracts.

[@trueCABLE]

Hello! Thanks for sharing. This definitely was correct a while back. Back when ANSI/TIA 568-B.2 released in 1999 there was notation that T568A was preferred in commercial installations due to backward compatibility with legacy analog devices (like FAX machines) and T568A might be required in US Government installations per contract. However, a lot has changed in 23 years. Much of that verbiage has been dropped over time and now ANSI/TIA 568.2-D (released in 2018) is agnostic about which one to use. Also dropped is the notation to use T568A due to US Government contractual requirements. Now it is up to the installer if the AHJ does not specify via contract, unless there is a genuine technical reason to use one over the other. In short, unless the contract specifies which one to use the installer is free to use either as long as the scheme is kept the same throughout the installation. Hope this helps!

[@James_Knott]

@@trueCABLE I started as a tech in telecom over 50 years ago. If you use B for Ethernet, you will then have to remember what a cable is used for before you punch it down. Take a look at the colour code for 25 pair cable and you'll see what I mean. These days, 4 pair CAT5 cable is often used where 3 pair CAT 3 used to be used for phones, etc.. Also, in telecom, BIX and 110 strips are typically used for those 25 -pair cables.

[@kyleMcC13]

this is all we needed to hear. thank you!

[@trueCABLE]

Thank you for your feedback! We'll share your comments with the team :)

[@kenmunford4971]

to be sure i have it , type A and type B patch leads can be interchanged ?

[@trueCABLE]

Correct. Both A and B are "straight through" wiring schemes. As long as both ENDS of the patch cable are wired the same, it does not matter and you can use them interchangeably.

[@vladislavkaras491]

Great video! Thanks!

[@trueCABLE]

That's what we like to hear! Thank you

[@aaronletchford]

Straight to the point 👌

[@trueCABLE]

Thanks Aaron! We are glad you enjoyed the video and found it useful.

[@randomdude1053]

Are crossover cables so common considering most switches auto negotiate now?

[@trueCABLE]

Hello! This is a great question. Crossover cables are relatively uncommon these days. Applications are typically low speed (100BASE-TX) and involve industrial machines. Hope this helps!

[@ohenning]

Thanks alot! Decent of you to add how crossover cabling works in the same video 👍

[@trueCABLE]

Thank you! We're glad you enjoyed the video!

[@carl20115]

Very straight forward explanation, thank you

[@trueCABLE]

Thanks for your comment! We are glad you found our content useful.

[@JeremyCook]

Does the T568 standard actually define the connector dimensions? Doing some research and it seems to be based on the telecom RJ45 standard, however, I've yet to find a solid definition.

[@trueCABLE]

Hello Jeremy and great question! Interestingly, 8P8C modular connectors are actually defined across three standards which are IEC 60603-7, ANSI/TIA-1096-A and ISO-8877. RJ45, used by itself, is not technically the correct term. I will often refer to these modular plugs as 8P8C RJ45 plugs just to avoid confusion. I hope that helps!

[@James_Knott]

Which standard. There's also T1 lines, which use a different pin out, though plugging in a straight through Ethernet cable works fine.

[@greenwolf2299]

Just found that B is the standard use in Europe, but i already made all cables standard A, my patchkabels however are just normal ones, still the internet runs great, wont this cause problems down the road?

[@trueCABLE]

Nope. You are all good to go. As long as your cable ends are terminated to the same scheme, it will make no difference of any kind.

[@mrchillgreen]

@trueCABLE everybody that tries to explain this never clears it up 100% so lets say i use standard B can i than use any ordinary network cable or must the network cable also be following B standard?

[@trueCABLE]

Hello! As long as you terminate BOTH ends of the SAME cable to either B or A, you can mix and match as much as you like. Both are "straight through" strategies. So, yes, you can proceed as you describe. That means you can terminate your solid copper permanent cable to B on both ends and then use two patch cords on either side that are wired to A or B. It won't matter. The key thing is the individual cable segment (termination to termination) has to be wired the same at both ends. You then have a straight-through cable. I hope that clears things up a bit!

[@kamaldeepsingh8249]

Simple answer for very bothering question thanks

[@trueCABLE]

We're so glad this was helpful!

[@Gancot]

finally!!! something straight to the point!!!! Thanks!

[@trueCABLE]

Thanks for tuning in, Andrew. We are glad you found the video helpful!

[@lerouxshanks8206]

Short but really informative video. Thanks.

[@trueCABLE]

We're glad you found this helpful!

[@singleman805]

Great video. I got a 15 mt CAT8 cable to connect a modem downstairs to a router on the second floor. I had to crimp both ends of the CAT8 cable. At the end I was disappointed because my wireless speed is 90 mbps down and up. I used the T568B standard. HOWEVER if the router is taken downstairs and a brand new, ( no crimping) 1 mt CAT8 cable is used to connect modem and router the wireless download speed is about 300 mbps while upload is about 100 mbps. What am I doing wrong ? I expected the same speed. Any input is appreciated. Thank you.

[@trueCABLE]

Great question. Your issue is almost assuredly marginal terminations at one or both ends. RJ45 plugs are very finicky regarding fitment, and if the plugs are not fitted to the cable correctly (picking by Category won't work), you will end up with issues like this. Typically, it is too much untwist at the connector and/or your insulated conductors are too small for the plug in question. A better method would be to terminate both ends to Cat8 keystone jacks and then use factory terminated patch cables at both sides.

[@singleman805]

@@trueCABLE I did get CAT8 keystone jacks from the same factory that sold me the CAT8 cable. I am going to open up the two original CAT8 keystones that I had to cut loose before wiring my building and make sure I will do the same combination/setting. I will also pay attention to avoid too much untwist. Your answer is appreciated. Thank you. www.amazon.it/Primewire-connettori-Connessione-Connettore-Retrocompatibile/dp/B07XZ6YSGM/ref=sr_1_1?__mk_it_IT=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=Primewire+-+2X+connettori+RJ45+a+crimpare+Cat+8&qid=1625578316&s=pc&sr=1-1

[@singleman805]

@@trueCABLESorry to bother you again but finally I was able to open up the original cable it seems that the set up is like this; starting from the left going to the right on top white wire, bottom brown wire then on top white wire bottom green wire then on top white wire on bottom blue wire and then on top white wire on bottom orange wire. Does this make any sense to you ? Thank you.

[@James_Knott]

First thing was wasting your money on CAT8. CAT5 is good enough for 1 Gb. Next, check your connection at both ends, to ensure they comply with 568 A or B. Also, WiFi is lousy for comparing speeds, as there are so many variables. You can get a utility called iperf to measure performance. Use it to measure only over the cable, before introducing WiFi.

[@mikeskybrowser]

Clear and concise, you got yourself a subscriber.

[@trueCABLE]

Thank you! Welcome to the trueCABLE community, we're glad you are here!

[@Honzaonza]

Good video, explains everything nicely. Subscribed

[@trueCABLE]

Awesome, thank you!

[@mrfizzy7024]

so B is ultimately better under any circumstances, got it Chief. I'm just kidding, cool video. I guess you could say it's straight through the point.

[@trueCABLE]

HAHA! Good one and thanks for tuning in. We appreciate your support.

[@businessuser8640]

Holy crap. Just found out in two minutes what the rest of the internet had trouble telling me in 5 years. Tom Hanks, my friend.

[@trueCABLE]

Thanks! We thought it was about time somebody explained it so it made sense. A lot of people make way too much of this particular subject.

[@GeneralCondom]

Get this man a beer!

[@anushibinj]

"Electrons don't care about colour" should be T-Shirt quote 😂

[@James_Knott]

I recently watched a video, where they were talking about neutrinos. Apparently they come in different "colours". 🙂 Actually, that's just for the physicists convenience in labeling the different types and not actual colours.

[@beaann964]

Hi, I want to ask if can we use the color coding T568 A in one end and T568 B on the other end in doing a straight-through cable? Please, I need your help😭

[@trueCABLE]

Hello! In order to have a straight through cable, you need to use the same color code at both ends. Using T568A at one end and T568B at the other end will result in a 100 Mb/s capable cross-over cable.

[@pc-peted2993]

Very good, thank you!

[@trueCABLE]

You bet! Thank you for watching our content :)

[@mephistopheles7388]

Thank you! Subscribed.

[@trueCABLE]

Absolutely. Thanks for tuning in!

[@bendirval3612]

I hate to ask basic questions, but I don't see the answer anywhere: My orange wires seem to be more tightly twisted than the other wires in there. Since these two standards change the location of the orange wires, doesn't that have an effect?

[@trueCABLE]

Hello and thanks for your question! The pairs are twisted at a different rate to maintain electromagnetic balance in the cable and to prevent one pair from interfering with another. The position of the orange pair at the termination (T568A vs T568B) is a non-issue as long as you obey the 1/2" maximum untwist limit. The 1/2" maximum untwist is accounted for in the standard no matter the rate of twist in any one conductor pair. However, like you, I was curious and benchmarked the two different wiring schemes next to each other using a Fluke DSX-8000 and found the result to be a tie.

[@gvfarns]

@@trueCABLE Thank you. That is very helpful to know finally!

[@HolowatyVlogs]

Even though B is more common, I did A for the entire run I just terminated. Good to know.

[@trueCABLE]

Thanks for tuning in!

[@VicIent]

Very clear advice. Well done!

[@trueCABLE]

Thank you. We are glad you found this video helpful. Check back for more content soon.

[@marcavargas1681]

Thank you, great short video and to the point.....

[@trueCABLE]

We're glad you enjoyed it! Be sure to subscribe for more how-to and informational videos!

[@videowatcher495]

I find B to be much simplier to remember.

[@trueCABLE]

Hello! I find B easier to remember as well. Thanks for watching our content!

[@nelsonlowes7708]

Crazy, some industry people still don't quite get this simple concept.

[@trueCABLE]

Indeed that is correct, Nelson. People make way too much of it and overthink it.

[@ocouture]

Just out of curiosity, why do you prefer type B over type A ? looks nicer? :)

[@trueCABLE]

No preference, actually. I just happened to memorize B first. I got lazy and did not want to memorize both :)

[@skwira000]

I don’t know if this is my imagination but it seems the B standard is easier when you have to crimp your own cables.

[@trueCABLE]

Hello! Well, I have to agree that T568B is easier for me to work with too. That said, there are some that swear by T568A. As it turns out, it has a lot to do with what you learned initially. In addition, when it comes to keystone jacks and other IDC terminations some manufacturers design their hardware to be a bit easier to terminate with one scheme or another. trueCABLE's IDC terminations tend to be easier if working with T568B, as a FYI.

[@skwira000]

@@trueCABLE Maybe it depends on what your dominant hand it.

[@trueCABLE]

@@skwira000 Good observation! Quite possibly that is it.

[@adlorin]

B is the standard, which makes it better. Always wire b. Everyone who comes after you, who has any cabling experience, will always expect b and will curse you out if you wired a.. especially if they need to troubleshoot your work. A, in the real world, is only used if the original run was split-paired for two digital phones (not ip phones) that each have a pair for power and voice - I.e. avaya or lucent. That is poor practice, outside of cross connecting between blocks.. but it is used. Blue/orange as pair one, green/brown as pair two.

[@trueCABLE]

Hello Patrick! I agree with your sentiment and reasoning, if not your exact words. The ANSI/TIA 568 set of standards (most recent revision being "D") indicate that either T568A or T568B is acceptable in a modern SCS. This is per the standard itself, so there is no arguing with that. In the older B and C revisions TIA did specify T568A as being preferable and T568B as the alternative--even pointing out that Federally owned buildings might (by contract) require T568A. That all changed in 568-D, and the verbiage was removed. Interestingly, in the TIA-570-D (Residential) you still see T568A actually specified for residential installations--although I still stick to T568B. Ultimately, the decision is up to the AHJ. If the AHJ specifies you use one or the other than that will take precedence. If no wiring scheme is specified by contract (or if YOU are the AHJ) then you can feel free to use either one. I hope that helps clear this up! It is a topic that has consumed far too much of people's time and generated needless anxiety.

[@James_Knott]

In the real world, I have worked in telecom going back over 50 years. 568A matches the telecom colour code.

[@shilla1972]

Thanks, straight to the point .

[@trueCABLE]

We're glad you found it useful! :)

[@Theopheus]

I know this video is 2 years old now. Google quotes Fluke network with the following: "T568A wiring pattern is recognized as the preferred wiring pattern for this standard because it provides backward compatibility to both one pair and two pair USOC wiring schemes. " Do you have any comments? For the record I don't know what USOC is anyways, and for some reason most youtubers seem to use B.

[@trueCABLE]

Hello and thanks for your additional insight. The problem with technical advice is that once it gets onto the Internet it stays there and then things change over time. Just try getting technical advice off the web for any Linux distro and you will know what I mean. I suspect Fluke Networks wrote that some time back. No doubt Fluke Networks stated this as a result of one of the older ANSI/TIA 568 standard revisions (probably B or C). The recommendation to use T568A commercially was due to some Federal Government contracts requiring it for cross compatibility and the possibility for analog devices still being in use. As of the 2018 "D" revision of the ANSI/TIA commercial standard the recommendation and preference language was dropped and now it's up to the AHJ (Authority Having Jurisdiction) as to which scheme to use. In the absence of a contractual requirement or technical reason to do so, the installer is free to pick and use their preference. T568B seems to be the defacto standard these days, although using T568A is fine too. The USOC wiring strategy is dated, and to pick T568A over B simply due to this is not bad advice, but not exactly up to date advice either. It should be noted that in ANSI/TIA 570-D it is still recommended to use T568A for residential installations due to this very reason, but I cannot remember the last time I needed to use an analog device plugged into a wall. The other consideration is many modern keystone jacks will suffer damage if you plug a RJ11 plug into them. Ours will, for example.

[@Theopheus]

@@trueCABLE Thanks for clearing that up.

[@IMPALA5151]

Thank you straight to the point

[@trueCABLE]

Thank you for tuning in!

[@jeremiahnewsom7775]

excellent!!!

[@trueCABLE]

Thanks Jeremiah!

[@darksidedevelopment]

You don't need a crossover cable to connect two computers directly... most computer NIC interfaces can detect the straight through cable and adapt...This is sort of an old concept/requirememt

[@trueCABLE]

Hello Brandon. Yes, most modern switches and NIC cards do auto MDI/MDX these days. Not all, but most. Crossover cables are sometimes necessary for application specific environments from time to time...specifically some factory equipment.

[@darksidedevelopment]

@@trueCABLE Correct, there is still some legacy critical facility hardware that I've dealt with that requires either a crossover or a rollover cable to interface with. Glad we have moved away from that lol

[@sethdaniels1872]

Thank you awesome video!

[@trueCABLE]

Our pleasure. We are glad you found it useful.

[@Jamesaepp]

The crossover cable being A on one side and B on the other is only applicable if it's half-crossed. Fully crossed would be a different combination. en.wikipedia.org/wiki/Ethernet_crossover_cable#Fully_crossed

[@trueCABLE]

Essentially correct, but fully crossed is rarely used. The T568A to T568B half cross is most common. Ultimately it depends upon the application. Regardless, the point of this exercise was to demonstrate that T568A and T568B schemes are equal as long as both ends are wired the same way.

[@kalijasin]

Very good explain.

[@trueCABLE]

Thank you!

[@JacobWilliamPoteet]

Thank you!

[@trueCABLE]

Our pleasure. Thank you for tuning in!

[@rogbartheswift1481]

appreciate the help

[@trueCABLE]

Thank you for tuning in!

[@ianmostowy4582]

FYI that is a switch you are using not a router also when you run a crossover cable from one computer to another you may need to adjust your configuration from full to half duplex to make it work.

[@trueCABLE]

Thank you for following along. Yes, that's correct. The switch was being used as a prop along with the Fluke tester as an example. The point of this exercise was to show where one kind of cable would be used as opposed to the other, not to demonstrate how to actually create a network.

[@James_Knott]

???? Half duplex hasn't been used since the days of hubs. With switches, full duplex is normally used. Also, modern gear doesn't even need crossovers, as the NICs will autonegotiate.

[@ianmostowy4582]

None of what you said actually corresponds with what I wrote. I was commenting on what the guy said in the video.. Everything I said is correct. You should also note that I said "May have to" I didn't say that a crossover cable is the only option. The guy in the video is the one who brought up crossover cables. I was merely adding a note. I will also state that Half Duplex is still used a lot with WiFi. Technically a Wireless Access Point functions as a hub. By using half duplex it means that the access point can have multiple clients attached simultaneously on the same channel/frequency but two devices can't both send or receive on the same frequency at the same time. The signals interfere with each other. By using half duplex that interference won't happen. With WiFi full duplex is really only used with Point to Point. Also most NVR controlled surveillance systems today only require Cat5e and 10/100M Base-T and allow for full or half duplex. @@James_Knott​

[@James_Knott]

@@ianmostowy4582 Why would anyone use half duplex these days? That died with hubs. Whether or not a crossover is needed depends on the equipment. Gb and newer 100 Mb gear doesn't need a crossover. If you have to use half duplex with a crossover, you have some other problem.

[@glee540]

thank you sir

[@trueCABLE]

Of course!

[@funnynoodle6997]

Simple thanks

[@trueCABLE]

We're happy you found this helpful!

[@saigonpilots7063]

I gave a thumbs up.

[@trueCABLE]

Thanks for tuning in and giving us a thumbs up!

[@veijolalli326]

If orange pair is opposite to blue pair so it is T568a - If green pair is opposite to blue pair it is T568b. Do not try to put T568a ends to T568b cable. Almost all cables are T568b. I am a retired instrument mechanic and it took really long time for me to learn this. When I started my career there was no 10BaseT only 10Base5 and 10Base2.

[@trueCABLE]

Hello! By "yellow" I am assuming you are referring to the Orange conductor pair? Inside of copper twisted pair Category cable you have 8 conductors twisted into 4 pairs. The pair colors are Blue, Orange, Green, and Brown. Each pair consists of what are known as "tip" and "ring" conductors, with one being solid colored and the other being solid white or striped white. When it comes to patch cords, it does not matter if you use T568A or T568B as long as you use the SAME color code at both ends. I hope that helps!

[@James_Knott]

All cable is the same, whether A or B. Only the connections change and only the orange and green pairs are affected.

[@trueCABLE]

@@James_Knott Hello! The A and B schemes swap the orange and green pairs, but if both ends are wired to the same scheme then you have a straight through cable. If one end is A and the other is B, then you have a cross-over cable. Modern switching hardware and NICs will use Auto-MDI/X to compensate for this, but not 100% of the time. There are devices that care. Just don't buy a cross-over cable unless you have specific reason to do so and you won't ever run into an issue.

[@mikkelgraff6879]

The only thing you sould have mentioned is that 99% of modern networking gear use auto mdi or auto mdi/x (i belive it is called) to figure out what cable it is a straigt or crossover and automatically changes the network port to what is needed. So connecting 2 computers with a type B straigt cable. Both nic's will detect and figure out who changes their port to be rype a or the other way around. They only change is they need to so if you connect to a switch or router then neither port is going to change if a straigt cable is used. This means so long all the haredware is modern you only need straigt through cables and type B is probably to most widely used. If you are bot sure if a device supports the feature them look up the specs and features of the device and its nic's

[@trueCABLE]

Hello! You are correct. The vast majority of modern Ethernet switches and Ethernet NICs support Auto-MDI/MDIX. That said, it still is best practice to pay attention as you never know when you will run into something that won't play nicely (or at all).

[@claudio1771]

I thougth those were a gigantic DMMs :D

[@BClaudiu-hy3yx]

Thx a lot man b it is

[@dualia-s74m]

#568BSupremacy

[@trueCABLE]

Hello Steven! I prefer T568B too, but not because it is superior to T568A. Just habit and the one I learned first.

[@justme5384]

Long story short. Doesn't matter which you use. Absolutely no difference

[@trueCABLE]

Hello Just Me. Correct! Just pick one and stick to it. I happen to prefer T568B, but only because I memorized that one first!