hi and welcome to Sigh Bury. My name's Anthony and I'm your local subject matter expert for Network Plus, and today we're gonna be using appropriate hardware tools to troubleshoot network connectivity.
So now that we've talked about some different devices that we may use in our network to provide us with additional functionality, let's talk about some of the physical tools that we have in our tool bag in order to be able to test network connectivity. Now, one of our first tools is going to be a cable tester.
Now a cable tester. Additional essentially lets us verify that we have a connection
from one end of a cable to another, that we have Elektronik connective ity and that the wires aren't broken in that they're in the correct order.
Now these cable testers will typically have a generator side and then a remote tester side, allowing us to test a long length of cable without having to pull up the cable and have both of the ends in the same place.
So we have a cable tester here. This is actually an all in one device that's also ah toner probe, which we'll talk about in a second. But if we take a look at our device will see that we have our signal generator. And then we have a remote tester
both of them have led is on the front, which go up and just keep running through in sequence.
Now, if you take a look at these led these. This is actually a damaged cable because this cable over here, it gets to a certain point, and then it skips one of the L. E. D's. So it actually goes up. Then one of the lights does not come on to correspond with the other end. And then it does come on.
Which means that not only do we have a damaged wire,
but one of our connections is actually swapped over in the wrong location.
So cable testers, what you're going to have various central item to have in your tool kit Number one just for general network connectivity troubleshooting, but very, very importantly, if you're making cables in running them in your environment, if you make an extremely long cable, if you say you make a 50 50 meter cable that you're about to put into your environment
before you run that cable and you spend all the time getting it in the walls and dropping it down.
You're going to want to test it first to make sure that it's functioning properly and that you did all the pin outs correctly. And then after you run the cable and you place it, then you test it again to make sure that it wasn't damaged during the process of running the cable. So your cable tester again is going to essentially allow you to number one
verify connection from point to point,
and number two verified the correct pin out by making sure all of the led is go up in the correct sequence. So it's a very important tool to have in our toolkit. I will be able to tell if our pin outs are incorrect or if we have a damaged cable.
this tool also doubles as a tone generator for our toner probe. Now a toner probe is less to check the cables, pronouncing it, and to check the connection and our tone, a probe will actually trace a cable. So we have a short cable here, so it's very easy for us to say OK, this cable in belongs to this able cable end.
But think if you're running a cable or you're tracing a cable that's having an issue
over a long distance, maybe it's a 20 meter cable that runs from a computer, jack all the way into a network closet and you get to the network closet and there's no labeling. Well, you need to know which cable goes from that that network closet to that jack so that you could test it. Well, on one end of the cable, you would plug in this toner probe
or this toner generator, and then on the other end you would use this toner probe. So what is this tone? A probe? D'oh!
Well, let's take a listen.
So away from the tone generator, this toner probe. If we test that, if we press the trace button emits a sound like this,
a very faint, nothing staticky sound.
Now, with the volume still all the way up,
now we take our generator, are generated generators transmitting a tone,
and we now introduce the end of our cable. Say we traced our cable
and now we trace and see if we can find where the end of our cable is.
So we found the end of our cable
with that faint tone that you hear
and you also hear it all the way up and down the cable.
So this toner are this toner toner probe, as we call it, allows us to trace the cable and find the in point, see what we're dealing with and see if we could find which cables having a problem. Now,
if you're in a quiet environment such as our recording lab here, it's very easy to hear your toner, your toner
say you're in a loud office environment. You're in a year in office that they're installing cable in and you need to trace a cable. You may not have the luxury of it being this quiet. So rather than just listening to the speaker, you can actually get a toner probe that actually has a headphone jack. He plug in your headphones and then you listen very carefully to your
to your actual signal that's going through your cable.
cable tester, remember, is going to be used in order to make sure that we have a connection from one point to the other and that our pins are in the right place with the wires inside our cable. And then our toner probe is going to be what actually traces the cable with our toner generator generating the signal and then our probe end tracing the cable. That's gonna be our toner probe.
Next up, we have a cable certify WR. Now we don't have a cable certify right here with us, but let's talk a little bit about them now. Whereas a cable tester is going to actually test the wires and the pins in the cable cable certify, our is going to do a lot more than that. A cable certify our is actually going to verify
bandwidth and frequency in a cable
and make sure it matches up to the specifications that we need that cable to run on This. This happens by having one end of the cable plugged into a device which generates a signal, generates a lot of traffic or a certain frequency of traffic, and then the other end of the cable certify are plugged into the other end of the cable,
and then we test the traffic going across that cable and making sure that the bandwidth,
the speed, the frequency going across that cable is up to par. We talked about our different cats are cat five cats, six cats, six a type cables. And if we're installing these cables in our environment, especially for installing a backbone type cable, we need to make sure that these cables we certify these cables that they're up to speed.
We don't want to get
a month into production and realize that we're not getting the backbone speed out of this backbone cable that we installed and we contest. Many different types of cables with these cable sort of fires were not just limited to Ethernet cable. We contest Ethernet cable. We comtesse co axial cable. We contest fiber cables.
So, really, whatever type of cable were installing in our environment
may form if we're doing a job to make sure that our cables are functional and that they're pushing the type of band with that we need. First, we'll use our cable test here to make sure that the ends are correct, and then we'll push a connection through our cable certify air to make sure that we're getting the proper band within the proper proper frequency through.
So our next to it was going to be our but set. Now this is going to be what our service provider is going to send out a technician with in order to test our plain old telephone system connection. So it's going when we talked about our Demark point. Our Demark point is the point where the, um
the responsibility of the network changes from the Internet service provider to our internal network administration. Now this Demark point is going to be where our installer comes in. They're going to connect into our Jack, and essentially what they're going to do is they're going to connect to the analog line,
and they're going to call the Internet service providers phone number
if they get a. If they don't get a signal or if they get a busy signal or they can't call in, then they know that something is wrong somewhere between the point of demarcation and the Internet service provider. However, if we have the install, if we don't have an Internet connection, we don't have a network connectivity to the Internet service provider that the technician comes out
plugged in the butt set,
calls the number, and they do get a correct response back then. We know it's somewhere on our internal network. It's something between our computer and the point of demarcation where there's an issue.
So again, it's typically going to be used when troubleshooting major network connectivity issues or used when installing. When we're actually installing the network into our environment and it's gonna include a it's gonna include a caller unit where you were they just going to connect into the analog line,
or they're going to use some alligator clips and clip onto the analog line.
They're gonna dial the number and call out and then hope they get a connection in order to verify that that plane, I'll tell a plain old telephone system connection is good on. They're able to get a connection between the point of demarcation and the service provider using the butt set