Low Internet Speed: Troubleshooting RJ45 Network Cable Issues (UTP Cat 5e, 1000Mbps)

Hello
I changed the internet speed from 100 Mbps to 500 Mbps, the problem is that on computers connected by UTP cat 5e RJ45 network cables 20 m long, the speed checked with Speedtest is Max 85 Mbps. All computers have 1000 Mbps network cards. On the third computer connected with a 1.5 m cable, the speed is over 520 Mbps - others connected to this short cable also get over 500 Mbps.
I conclude that it is a cable problem, but I do not know if it is the fault of poor quality (cat 5e) and it is only the inscription on the cover or the problem is caused by laying in the baseboards (coaxial cable from the cable, electrical installation in the wall) causing some big interference. buy a new cable - I'm thinking about a shielded cable, but I don't know if I put it in the same place, the problem will disappear.

Pull the current cables out of the strips and you will know if it is the fault of the cables or the interference

Thanks, but it's not that simple (put the furniture back, etc.) I would have pulled it out and checked it on the floor a long time ago.

Do it or buy it as you have it now.

These are two cables from different sellers, bought ready. From one I can cut 5-7 m, I do not have a kneader yet, but the idea is good.

peePeer wrote:

These are two cables from different sellers, bought ready. From one I can cut 5-7 m, I do not have a kneader yet, but the idea is good.

As I know life, you bought the cheapest cable (packet). Unfortunately, good cables cost money. With such lengths (20m) it is reasonable to lay good quality cables and terminate them at the ends with sockets, and then connect the devices to them with packets.

Exactly, the cheapest cables, at speeds up to 100 Mbps, worked well. I just ordered a crimper and plugs, when it comes, I will check the method with cutting off a few meters of the cable and check on the floor, if it is about 500 Mbps, it means that it collects interference.

Hello again
The kneader came, I checked 1 cable with a tester, and it turned out that 1 pin did not connect, I replaced the tip but the speed did not increase. Cable - it turned out to be an alu line and, what's worse, it is not even a twisted pair. I cut almost 11 m from the second cable - the cable is copper-plated alu wire, I checked the speed of 85-90 Mbps on the floor. The speed on this shortened about 9 m to 90 Mbps. You will have to replace the cables, of course, with copper wire, or buy ordinary UTP or shielded ones - while arranging the previous ones, I had to bend quite strongly in several places - I don't know if the shielded one can be bent that way, I didn't have one in my hands. Another problem is the screen, it must be grounded, is it enough to connect the router and the computer with a metal plug, or do you need to additionally ground it? . What cat 5e or 6a? because I would prefer not to do it a second time, I know that the Cat 6 cable will be thicker and probably harder. On Monday I am going to order a cable - by then someone will help and advise the best solution.
best regards

peePeer wrote:

it's not even a twisted pair

Then you have the answer.

peePeer wrote:

buy ordinary UTP or shielded

UTP, there are only problems with the screen.

peePeer wrote:

Another problem is the screen, it must be grounded

Well, just like UTP, there is no problem with the screen.

Thanks
And the categories? 5e or maybe 6a - I just don't know if it's much harder.

Added after 16 [minutes]:

One cable has the colors arranged according to the type of assembly 2, and the other (the one is not a twisted pair), it is not known because the colors are a kind of massacre similar to each other. both cables are type - simple, connected correctly - tested with a tester.

Thanks
I have a router up to 1000 Mbps, but when I connected the internet for the first time - with a killer speed of 4 Mbps and then it seemed a lot ... I will probably put cat 6a because it is not known what speeds will be needed 2-5 years. It is not known, maybe in a few years there will be 8-16-32 K TVs?

According to type B, the second one has completely different colors but the tester shows the same order of insertion.

Yes, the cables are properly clamped, I suspect that the cables are poor quality -20m, they cost about 10-12 with shipping, as I wrote above, one turned out to be a non-twisted pair with non-standard colors.


Supplier atelpol
Arris router
1000 Mbps speed
Proven speed test

I can make a shorter piece of twisted pair out of this cut piece (1-1.5 m) and check the speed with the Speedtest.

Arris TG2492S
I made a 1.5 m cable what? -and the same about 85 Mbps. I attach a photo of the contacts.

Nobody used the net during the test.
I did restart the router. On the original cable from the cat 5e router, the speed is correct, the router supports up to 1000 Mbps but the ordered speed is up to 500 Mbps and the speedtest shows over 520 Mbps. I connected all computers via this cable and they all have speeds above 500 Mbps. Only on this old cable it is 85 Mbps - the same is at 1.5 m and the same at 20 m, it is not normal for me.

peePeer wrote:

I attach a photo of the contacts.

Can I see well? After zooming in, I see some strange unevenness, dimples, pitting on these contacts. Is that right or is it just glare? Maybe it is not in contact in the sockets.

@jprzedworski it looks as if it was not a crimper made with just a screwdriver

A crimper, but for PLN 9 it is a bit defective, it presses pin 1 and 8 poorly, you need to press it a few times, I will file a complaint. so I do not need such "for years"

Maybe it will crash, but you have to notice that the factory contacts were not better at all, but exactly the same

Hello

Dude # peePeer # - Is there an anti-virus program on your computer ..? It may be the cause of the problems you write about.

A few months ago I was having exactly the same event with the change of internet provider and its speed.

It looked like this:
The previous provider gave Download up to 20 Mb / s and Upload sometimes up to 2 Mb / s. and somehow it was slow but it worked .....

The new provider on optical fiber gives 300 Mb / s at 150 Mb / s. but computers only see 100 Mbps at 100 Mbps.

Where is the cause ..?
Network cards checked, each has a bandwidth of up to 1Gb transmission ... which is much above the provider's parameters.

It turned out that the cause of the problems was a paid antivirus program, which must be properly configured for this speed. (I will not mention the name of the program for obvious reasons)

I suggest you take a look at the settings of the antivirus program if you have one on your PC.

In my case, one call to HELPDESK of the company from which the antivirus was purchased was enough.

best regards