Time
2 hours 16 minutes
Difficulty
Beginner
CEU/CPE
3

Video Description

Rj45 Straight, Crossover & T2 Crossover We continue our examination of Rj45 cable with a detailed explanation on its pin configuration. With the Rj45 the opposite end pin connectors do not always numerically connect to the same colored wiring standard, for example where the 3pin connection originates from a white wire may connect to a 4pin at the other end of the wire not a 3pin. Therefore you'll learn about Straight, Crossover and T2 Crossover Wiring color standards apply to all cable speeds (Cat3-6) the Rj45 cabling family and how they match-up. We'll diagram how each pin-to-wire color arrangement is used and why there must be distinction. For example, Rj45 Straight cable will only be used between the router and workstation and its pin-wire arrangement is always 3pin-to-3pin on the same wire, which is what defines straight because with the same pin number is connected to the same wire color on both ends. In the Crossover or T2 Crossover, that is not the case.

Video Transcription

00:04
R R J 45. We talked a little bit about how we have different color patterns Are type A and type B color patterns that we use in order to make sure that we're setting up our cables properly? Well, another reason we have these different color patterns is we sometimes have cables. Where are
00:22
pins air alternated on the different ends
00:25
pen three, maybe a different pin on the other end, depending on what type of cable were using, our three standard cable types are going to be straight cross over and t one cross over. So we're talking about our straight were referencing a cable that is
00:42
depends on one end or the same as the pans on another end.
00:46
So pens on one end of our cable are exactly the same as the pens on the other end. Pin one is connected to cable, one, which is connected to pin one on the other end. Pin, too, is connected to cable to which is connected to pin two. On the other end, you get the idea very, very straightforward.
01:04
Sorry, my jokes are always bad. Are straight cables were going to see that being used for our
01:11
situations. Like when we're connecting our computer to a router or computer to a switch, It's gonna be the most common cable set up that we're using when we're connecting. So don't confuse this with our different categories of cable. You can have a cat, three straight cable, a cat,
01:29
five straight cable, a cat, five e straight cable,
01:32
the straight cross over and T one crossover are all different,
01:38
all different
01:38
arrangements of the pins and the wires on the different ends of the cables. This is to describe how the cable, how the two ends on the cables interact rather than the cable speeds themselves. With our straight cable, we're disconnecting from a computer to a router.
01:52
Our next one or crossover is going to be
01:56
one color standard on one end. So a C A T 5688 on one end and a different the other color standard on the other end t 568 be on the other end. That's the easiest way for us to think of it.
02:08
So where is the straight cable? We would use one color standard the same on both. INS t 56 85 6 a on the cross over. On one end, we would use our T 568 a pin out, and we connected to our t 568 v. Pennell
02:28
and remember T 568
02:29
A and T 568 b are both standards for how the colors of our cables, what order we put them in on our pens. They're standardized cables so that when we're setting up infrastructures, we don't have to guess we don't have to make up our own color schemes. Every different times
02:46
we use are a standard or be standard, and we're making our crossover cables. We can make our
02:52
a crossover cable or a bee crossover cable. This assists us when we're trying to connect to similar devices such as a let's, say, a computer to a computer or a computer to the back end of a router, and we want to do some configuration on that router when we're doing configuration mode. When we're trying to configure that router,
03:10
we won't use a straight
03:13
cable into their We use a crossover cable. There are a lot of times in routers where
03:17
in the back of the in the back of the router we may have a We may have a port for a serial port and then on our computer, we have a port for a serial port, and in between the two, we connect them over Ethernet. We use an Ethernet cable to connect the both. The serial port ends with an adapter.
03:37
The Ethernet cable between those two serial ports
03:38
we would use is a crossover rather than a standard straight cable. The pins and the wires on the two ends would be different. Color schemes would be different. And when the information between the two ends transfers, that's how we're able to configure the router.
03:54
So different situations call for different cable types. In our third cable, tight
03:59
is going to be our T one cross over these air going to be used to connect two of our T one devices, T T one devices or special types of devices that you don't see is common is just connecting our computer to a router. But sometimes these two T one devices do need to be connected together
04:17
like a t one router or T one switch.
04:20
So these t one crossovers do need to be made sometimes we're making a T one crossover. We don't really describe it using the A or B color configuration, but we just write out the pin connectors on Penn Connectors. Here are pin One will connect to
04:40
pin one on one end
04:42
so we'll do our first in number here in our second end. Over here are pin one on this end. Well, actually, connect over to our pin four on our other end of our cable. Arpin, too, will connect to our pin. Five are pin four will
05:01
connect
05:01
over to our pin one on the other end. And then, lastly, we have our pin five connecting to our pin to our pins. 367 and eight are straight on the both sides. So on our left clip pin three, we connect pen three pin six to pin sixpence 7 to 10 7 pin 88
05:20
pins. 124 and five are the ones that on the left side in one pen for pin two and five men, four men one and five into this can seem a bit complicated. But before you're actually crimping cables and when you're actually making these cable connections, you will be able thio you.
05:41
You will be able to use reference guides
05:43
in order to make sure that you can check the cables at both ends. You can also get cable testers, which allow you to plug one end of the cable into teach end of the tester to make sure that the pins are aligned properly, whether you want to straight across over or t one crossover.
06:00
But for in exam situation, for example, purposes you do want to remember that
06:08
are straight is going to be the same on both ends. The same color scheme on both ends are cross over. It will be
06:15
a color scheme on one end be color scheme on the other end and our t one cross over I will have pens 124 and five swapped over on the other end. That's pretty much all of our information we have in this section for R. R J 45 twisted pair. Just we just run to remember how we have that maximum length of 100 meters.
06:34
It's typically an unshielded twisted pair bundle
06:38
our cat three, Cat five, Cat five e and Cat six and Cat six. A cable types as well as our network types, or 10 based T ah, 100 based T X and 1000 base t R. Ethernet, fast, Ethernet, gigabit Ethernet.
06:54
And then how we have our different wiring types are straight cross over and t one crossover and the uses for each. And if we keep this information in mind and we learned this information and get it memorized, it'll help us greatly in the futurist technicians and also for exam purposes.

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Instructed By

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Anthony Harris
Senior Systems Engineer at ZenPoint Solutions
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