Time
5 hours 33 minutes
Difficulty
Beginner
CEU/CPE
3

Video Description

Troubleshooting Wireless and Wired Connections Part 4 Now it's time to explore Wired Connectivity issues and by demonstration, you'll learn how to master troubleshooting both digital and physical issues. We begin with examining several physical tools such as cable tester, wire strippers, and we demonstrate how to use them correctly as well as what issues to look for in handling the correctly in addition to explaining their purpose and what diagnostics they provide. For example, I handling the cable testing you want to assure all the cable being tested in plugged into the correct port, that the cabling itself is responding correctly because the internal wiring is accurately matched up, which also confirms that the cable is functioning properly.

Video Transcription

00:04
So we talked about some of the different issues that we may have with a wired or wireless network and activity and some of the possible causes. Well, let's take a look at some of the tools that we can use in order to help diagnose those. Now we have physical tools, and we also have digital tools. Well, let's start with the physical. Our first physical tools going to be a cable tester.
00:22
Now our cable tester, as we have one here,
00:26
is going to be a tool that allows us to check. Not on Lee, where, how a cable, how good a cable is, but also to make sure that it's punch down correctly and that the that the cables on one side of the connector
00:42
that all of the cables punch down onto one side of the problem match those on the other side.
00:46
So let's gravitate cable and let's take a look here we have a straight through cable. Now we want to check this cable, and we have a We have a bass part here that has the battery in, and then we have our remote tester. This one does not have a battery in it, but because we're able to send an electrical signal through this cable, we don't need one.
01:04
So let's go ahead and we will turn off our cable tester for now.
01:10
And we will place our
01:14
cable in
01:15
the correct port
01:18
on both ends
01:21
and will turn on our cable tester. Now. As we go through and we begin pressing to test,
01:30
we will see that
01:33
we have our light going down
01:34
the bar
01:37
and showing us
01:38
that our
01:41
cable matches up on both ends.
01:42
So we want to make sure that our cable is the same on both ends because we want this to be a straight through. We want to make sure that the internal wires match up the same on both ends with the actual prongs that plug into our network interface card. And once we check our cable and determine with our cable tester that it's good,
02:00
we're able to troubleshoot other issues if we need or for making a cable,
02:06
we can say that this cable is good and then put it into use. Our next tool is going to be our loop back plug. Now, our look back plug is a small device, much like this one that we plugged into a network interface card. We plug in tow a port, and this device actually tests the port that we plug it into our look back plug
02:24
essentially takes the outgoing the outgoing pins and redirect them as incoming pins
02:30
so that we can use specialized software with our look back plug in order for our computers a test and see if the network interface card is good. So we use our look back plug with our specialized software to check and see if the network interface card if the port on it is actually working properly.
02:46
So next we have our punch down tools. Now, our punch down tool is a tool that allows us to
02:52
punch down our actual cables that are inside of our network cable into a patch panel or Keystone so that we can place it, place a patch panel up or we can place our keystone in the wall Now are Keystone. This little guy is going to be the support that we put in the wall
03:09
Now, on the end, that comes out of the wall that we plug into our computer.
03:14
We just have a standard port that will crimp the end of our cable and plug our will plug our actual R J 45 cable into. But on the other end, the end that's typically inside our wall will need to punch down individual wires
03:28
into
03:29
our punch down vampire teeth that pierced the external, pierces our external insulation and then actually makes contact with the metal inside. So we already went ahead and strip this wire. Let's see if we can punch it out. We have a punch down to here
03:45
and we have our wire
03:46
and they are color coded.
03:50
So we'll go ahead and we'll get these guys lined up
03:53
inside the vampire teeth
03:55
and you want to go ahead and make sure that you get him started. Started getting. I'm seated because it makes it a lot easier when you're trying to use your punch down tool.
04:05
Now this punch down tools spring loaded, so had a little bit of a kick to it. We put our cutting edge
04:11
towards where we want to cut off the excess. We don't want our cutting edge to be towards the remainder of our cable,
04:18
and then we'll simply
04:23
plunge down our cable in there
04:25
and then we'll do one more.
04:28
Actually, that one didn't see it very well.
04:31
So do that one more time
04:40
way so we could see how we do it a little bit too much. We actually just broke the cable there, but
04:49
it does happen. So
04:53
we want to be careful more punching down our cables and if
04:57
who actually just need to go in there and wanted to remove that little piece
05:00
and we'll continue punching down.
05:04
So the punch down, we'll take a look. And I made sure that my vampire teeth in here make connection with the metal part of the wire. And once we've got all of these punch down, we would actually just close up our keystone,
05:18
which would help keep the cables in place and then install it in our and we'll be able to install our keystone in the wall. So that's our punch down to next. We have our toner probe. Now our tone a probe is going to allow us the ability to follow a cable from start to finish. So
05:34
we have our tone, a probe here,
05:36
and we're gonna go ahead and remove it out, and we can see that our tone a probe has
05:43
two parts.
05:45
The bass part which we actually plug our cable into, is what sends the signal down. Our actually sends the signal
05:54
down our cable.
05:56
So we'll turn on our toner probe,
06:02
and then this will induce a signal down our cable that we can follow with this that we can trace with our toner probe. Now, we have a short little cable here, but you can imagine how if you had dozens of cables plugged into a particular switch and you were trying to follow one cable in particular, that was your problem cable
06:20
and see where it ended or see where it started.
06:24
You could use this in order to help track that down without having to take your fingers and run it across a cable all the way from start to finish, which a lot of times is impossible to do, depending on how cable it's air managed. We got a signal started,
06:35
So
06:36
when we hold our toner probe away from our cable,
06:41
we can hear just sounds like static.
06:44
Now we're gonna go ahead and introduce our cable.
06:47
We're gonna leave our general toner pro generator here on the table.
06:51
We have our cable end
07:00
and we hear how we generated a tone, a difference from away
07:05
to close, so on and now just
07:10
prove a point. Essentially, we have another cable here. This cable is not have a tone being generated on it were actually we'll take our same cable here, unhook it from our tone generator,
07:21
and we have no tone. So using our tone a probe using our toner generator, we can trace a. We can trace a cable. We can trace where it's going and be able to
07:33
find that cable a lot easier. And if we especially if we need to, we can even hook in some headphones into the toner probe end. If we're in an environment that's very noisy, that we can listen to that tone extremely well on weaken. It will help us in finding where we start our work able starts and where it ends.
07:53
Next we have our wire strippers. Now, our wire strippers may come in all shapes and sizes. Um, this is actually a crimping tool, but it does have wire strippers on it. But we also have wire strippers that all they really do is they cut and they strip our wires. These particular wire strippers we can place on our wire on. And we could just
08:11
twist around using our small finger hole here,
08:16
Um and so we'll take our
08:18
cable and we'll take our wire strippers slash wire cutters
08:22
and
08:24
we will cut our wire
08:31
a little bit thicker because this is actually a cat sick skill.
08:35
Here we go.
08:35
So we have cut our cable, and now we want to strip the outer insulation without piercing the inner cables. We don't wanna pierce those cables and cause any data issues,
08:46
so we'll go ahead and we will
08:50
place this cable
08:54
actually
08:56
sucked right here.
08:58
Yeah, well,
09:00
turn our cable around here,
09:03
get a decent cut, and then just twist it the rest of the way off
09:07
to finish off the plastic,
09:11
and then we'll remove our outer plastic.
09:15
And now we have successfully exposed our inner cables
09:18
without piercing.
09:20
We want to check and see and make sure that none of our inner cables are pierced to potentially cause any issues. So that's our cable strippers. Next we have our crimp, er,
09:31
arc Ripper is what is going to allow us to actually put an end on
09:37
this cable here will be able to take a Terminator much like the one that we have here when we want to plug the cable into a port
09:46
and we will make these cables
09:48
individual and
09:52
we will get rid of our core here
09:54
and then with these cables, individuals will simply slide them inside, will slide them inside and in peace,
10:03
and then we'll crimp everything down.
10:09
Obviously, we didn't crimp down a crimp piece, but
10:11
that's that's our actions that we perform with our Quimper now are Quimper is used again for if we need to crimp down in peace. Maybe we've determined that cable is bad reviews the cable tester and maybe some of these cables or swapped where they need to be there, not on the correct pin, so we can use our cable stripper and we will cut our cable
10:31
and then strip out our out of core.
10:33
We'll put our cables in. The correct sockets are in the correct little plastic ridges, slow process valleys inside of our in connector piece, and they will just crimped down our cable and then terminate our connection. Once we've crimped a cable. Once we've crimped a connector, we can't
10:52
try to rip the cable out. And then we use that connector. That cable's done that cable script down. We've pushed the vampire teeth into the activated position
11:00
on dhe. We can't un activate them, so well, we only either once and done.

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Troubleshoot Critical Systems

Diagnosing system malfunctions and finding a solution is an important skill for help desk professionals to develop. Expand your knowledge of the troubleshooting theory in less than an hour.

Instructed By

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Anthony Harris
Systems Analyst and Administrator at SAIC
Instructor