Questions tagged [rj-45]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
0 answers
22 views

Lights for 1 & 2 light up Cable Tester even when Remote is not connected

I connected my master up to one end of the wire and I’m surprised that 1 & 2 was lighting up. I double checked if the remote had been connected to the other end and it was not. I have one of those ...
1 vote
0 answers
24 views

How to run cat6 shielded cable from rack

I'm planning on running shielded cat6 cable because Ethernet will travel parallel to power on multiple occasions. The rack and patch panel they are going to will be bounded to ground. A few questions: ...
  • 111
-1 votes
1 answer
34 views

Reading and understanding data from RJ45 [closed]

Situation... I have a solar setup that power up a few secondary utilities here at home. It's a simple setup that I hooked up a monitor that display a few stats for the system. that monitor is ...
  • 101
0 votes
0 answers
26 views

Force Plug-n-Play device to use certain driver

Equipment: Presonus Revelator Microphone The Goal: I would like to use my microphone further away via a USB-To-RJ45 extension. Basically sending USB over an ethernet cord. The Problem: When the ...
0 votes
3 answers
83 views

What kind of phone cable is this?

I'm trying to convert my phone line into ethernet cables, but I'm trying to figure out how to do it. I read that you need cat 5+ cables to use for decent speeds. But when I look in the closet box, I ...
  • 195
0 votes
2 answers
44 views

What devices suitable to provide wired LAN from Wi-Fi?

I want to move my NAS where I don't have a wired connection. So I am looking for a device that connects to my Wi-Fi network and provides an RJ-45 port. I found many devices such as "Access Point&...
  • 2,607
0 votes
0 answers
42 views

Crimping my own cat5e cables connection issues

I bought bulk cat5e cable so I can do a poe security system. I bought a tester and it shows my cable is good. The problem I am running into is that I am testing my cable speed on my ps5. When I plug ...
  • 1
0 votes
0 answers
42 views

WIFI data transfer stops when traffic increases over an old and 25 meter long RJ45 cable

In my home I'm using a 25 meter RJ45 cable to feed a remote part of the house with Internet. I installed a D-Link router (now that I'm at work I don't have the model specs, but it costed 130 € and is ...
  • 103
0 votes
1 answer
630 views

What does this undocumented solid red LED (Intel 2.5G LAN) on the RJ45 connection mean?

On a Gigabyte Aorus X570S PRO AX board the RJ45 LAN Port is documented with Here's what I observe. Note the red speed LED. Both are solid on, the amber Activity LED flickers only momentarily since ...
  • 587
0 votes
1 answer
104 views

Conecting a controller's RJ45 port to laptop's USB port

I have a CNC controller that uses RJ45 socket as a input for reciving instructions from my laptop. I use a USB to RS232 adapter and then RS232 to RJ45 adapter to finally connect my controller using a ...
  • 1
1 vote
1 answer
176 views

How to interpret this rj45 tester double blink

I have some cheap rj45 tester and wanted to test my newly installed rj45 cord. And because the most of cord is underfloor (there is some risk this was damages during renovation) I wanted to make sure ...
  • 533
0 votes
1 answer
157 views

A virtual network interface to another machine's network interface, possible?

I have the latest macbook pro and a windows laptop both connected to the same wifi. Then I need to connect an external device which uses RJ45 network cable. The macos is the main computer but it does ...
  • 554
0 votes
2 answers
152 views

Can I pass an RJ45 WAN router port through the RG11 telephone port

a friend of mine just moved into a new 2 story house. She used to use PLC for her internet connection in her old one story house. Now, she obviously gets a lot lower speeds, not only over ethernet but ...
0 votes
4 answers
294 views

How to repair a flat RJ45 cable and connector?

My son installed a flat RJ45 cable with moulded connectors between two rooms in our house. However, the connector and cable at one end got torn off. Pulling a new cable is sadly not an option, so - ...
1 vote
1 answer
2k views

Ethernet cable tester only blinks on 4 and 5, incorrect order

I have two Ethernet ports wired together (A -> B). I used a cable tester to check whether they have been wired correctly, and I have the following findings: Transmitter is on A, only flashes 4, 5. ...
  • 123
1 vote
0 answers
73 views

Ethernet cable CAT 7 installation

I'm installing an ethernet network on my house. One of the cable goes under the floor so this installation is meant to stay like this for a while. So I try to buy the most recent hardware for future ...
0 votes
0 answers
967 views

Lan cable passes cable tester but doesnt work (partially)

So I bought brand cat 7 roll from amazon with good reviews (dont need cat7 in this particular case just want to connect a 2 meter cable @ 100mbps) How I connected the ends 1st pin orange stripes 2nd ...
  • 182
0 votes
1 answer
721 views

How do I open this RJ45 wall jack?

Hi I am try to see if the cables in this RJ45 wall jack are put in correctly but I can’t seem to figure out how to open it. Does any know if this can be opened or does it have to be broken?
1 vote
1 answer
142 views

Cat6 cabling faulty? Any way I can salvage this?

I got cat6 cables set-up with my house when it was built. Everything seems to be working fine, until last week when I tried for the first time one of the last RJ45 wall sockets I was yet to use. I ...
  • 111
-1 votes
1 answer
255 views

Can I use a USB 2.0 female to RJ45 cable to print docs sent to my router connected printer?

Can I use a USB 2.0 female to RJ45 cable to print docs sent to my router connected printer (USB only). A device like this one? Why do people use a print server if it can work like this?
0 votes
1 answer
419 views

Homemade Cat6 ethernet not working when PoE is in use

I've just crimped together a couple of CAT6 Ethernet cables. The cables are about 20 meters long each. They are shielded and so are the connectors. They run along each other from one room to the ...
  • 1
0 votes
1 answer
261 views

Does the "category" of RJ45 female connector affect possible speeds/quality?

Simply enough - if you connect an RJ45 connected marketed as "CAT5e", to a CAT6a cable & network, will it affect speeds or quality? is it just marketing? Or is there an actual difference ...
1 vote
1 answer
496 views

How to convert an Ethernet interface (via USB) to a simple RJ45

I have a device that outputs a USB cable that, when plugged into a computer, creates it’s own network interface. My question is, how can I convert that USB cable to a RJ45 Ethernet cable, so that I ...
  • 111
2 votes
1 answer
559 views

Home Networking Rj45 from switch to faceplate

I'm currently running network cable from a central switch to different areas of the house. One room has an RJ45 faceplate, every other cable is running between locations connected to rj45 connectors. ...
  • 21
1 vote
2 answers
4k views

Internet access: dsl cable to ethernet in the router

Can I access to internet by using not the RJ11 to RJ11 cable, but a cable RJ11 to RJ45, namely a cable with a dsl tip and an ethernet tip like this? I didn't find a solution of this type on the web; I ...
0 votes
0 answers
195 views

Ethernet Connection Drops from Router - Un/Replugging Cable Fixes

I recently added an ethernet line that runs though some walls to link a microserver and some RPis in one room with the main router in another room. I have a problem where after some (seemingly random) ...
  • 1
0 votes
1 answer
66 views

CAT5E Troubleshooting

I ran CAT5E through the walls in my house today. Everything looks fine but when I crimp the ends and attach them to my Rogers modem the cables are not working. I thought I was crimping it wrong but ...
  • 1
0 votes
2 answers
285 views

RJ45 sleeve slips off after crimping

I've had to crimp a few cables with an RJ45 connector to get my house wired up. I noticed on some old ones that I had crimped, the plastic sleeve has slipped out of the connector. The cable still ...
  • 101
10 votes
6 answers
5k views

Is it possible to connect an old RJ11 phone line into a Cat 6 wall socket to use for FTTN service?

I just moved into an older house and the NBN guy told me the phone socket's been cut off and plastered over. I checked with the previous owner and he said that the cord is just cut off, sitting under ...
  • 125
1 vote
3 answers
391 views

Can a screw terminal jack handle high speed (> 100 Mbps) Ethernet?

The builder ran Cat-6 cable through the walls, and then installed these screw-on RJ-45 Ethernet jacks: To my eye, because the twisted pairs are untwisted for an inch or two, it's highly unlikely ...
-1 votes
1 answer
42 views

Home Networking Cable and equipment choice [closed]

I wanted to rewire parts of my home, and got across the Cat Standards. However, when trying to shop for Cat6a, I almost always only come across Cat7 cables. Why is that the case ? Where can I get good ...
  • 1
0 votes
0 answers
69 views

RJ45 not working on my Toshiba Qosmio X500 Notebook

When I plug the RJ45 cable into the machine, running Windows 10, I get the message Unidentified network - No internet I do have a Wi-Fi connection to the router, so I am on the internet, but the ...
  • 1
0 votes
2 answers
975 views

RJ45 Crimping - Do I have bad plugs?

I have a basic crimping tool that so far worked most of the times. I am a hobbyist when it comes to computers and networking. Recently I bought a few new plugs and now crimping simply does not work. ...
  • 1,524
1 vote
0 answers
735 views

USB-C to HDMI cable length restrictions

I'm curious how USB-C to HDMI cables lengths restrictions work? I know USB-C has a reliability restriction of 13ft and HDMI can run up to 50ft. However, if you have a USB-C to HDMI passive cable, what ...
  • 21
1 vote
1 answer
2k views

Home network cabling (F/FTP, U/UTP, U/FTP)

I am doing some re-wiring at home and I am buying new patch cables. Here they are: http://www.justslim.eu/index.php/slimlight/slimlightutp You can get these in either U/UTP, U/FTP or F/FTP and I ...
  • 156
0 votes
1 answer
36 views

Home Cat5 questions

The house I'm working on has pre wires cat5 going through it, but they didnt terminate any wall plates. They all centrally meet in the basement. The demarc unfortunately comes in upstairs. The modem, ...
0 votes
3 answers
752 views

Can i use RJ45 ethernet splitter as second contection to my pc?

I have a router and laptop but when my parents turn off router I will not receive the internet, so I decided to use RJ45 as the second connection. You can see how I imagined it in the picture. So, I ...
0 votes
1 answer
58 views

RJ45 between wall sockets

I have installed a 70 meter long RJ45 CAT6 cable between my house and my garage. The setup I'm trying to achieve is very simple: Router <--> eth cat6 (industry crimped) <--> wall socket <-->...
  • 101
5 votes
2 answers
6k views

Should the pins on both sides of an RJ11 cable be in the same order?

Is RJ11 pin order like RJ45 where the order is always the same (e.g. Brown is always on the left, when looking from the bottom), or should they be mirrored - one side with red on the green's right, ...
  • 1,441
2 votes
2 answers
13k views

Convert RJ11 to RJ45

I have random RJ11 wires in house which have been cut off as they were used for the master socket and the master socket was in an awkward place. And I was wondering if it was possible to convert both ...
1 vote
1 answer
1k views

Determine cause of low bandwidth on solid Ethernet cable with stranded connectors

I installed stranded RJ-45 modular plugs on solid Cat5e cable. My cable tester shows all cables are OK, but all except one won't go beyond 100 Mbps (I have a 300/300 connection). How can I determine ...
  • 13
17 votes
3 answers
6k views

RJ45 -SFP Connection?

I originally thought that SFP connection involved optical fiber. However, I came across an RJ45-SFP Copper device. Thus, it appears to be an SFP device that connects to an RJ45 slot and conducts ...
  • 431
0 votes
2 answers
99 views

I am confuse to use fiber optic cable, Rj45 or current cat6 cable?

We want to do networking again, server room is on first floor connected to 25M cat6 UTP cable with ground floor DLink router modem(DSL-2750U).(I can not change this cable as it done during ...
4 votes
1 answer
515 views

10pin RJ-45-to-USB, need to make console cable (Linux router)

To preface this question: I'm not able to get to a parts store any time soon. I'm well aware that I could buy what I need, but I'm trying to make do with the tools and hardware I already have. I ...
0 votes
1 answer
103 views

Cat6a RJ45 connector does not connect

I have Cat6a S/FTP Shielded cable, TP-Link TL-SG1024 (24 port) switch, deleyCON Cat6a wall sockets (with 2 RJ45 ports) and a Cat6a deleyCON (24 port) switch panel. I bought Cat6a RJ45 connector (FTP ...
  • 161
2 votes
2 answers
7k views

Why does RJ-45 use pins 1, 2, 3 and 6 instead of 1, 2, 3 and 4 to send and receive data? [duplicate]

Why does TIA/EIA 568A and TIA/EIA 568B use pins 1, 2, 3 and 6 to send and receive, instead of 1, 2, 3 and 4? Is there a significant reason for this?
  • 101
0 votes
1 answer
41 views

Why would someone cut off 4, 5 and 7 on a 568A Ethernet termination?

I recently ran into a network that was having some very peculiar problems. I ended up having to re-terminate the connections, which seems to have resolved the intermittent problem, but what I found ...
  • 1,021
25 votes
5 answers
20k views

Home ethernet - daisy chained

I recently bought a house with RJ-45 and RJ-11 on one wall plate, and coax for TV on the other plate in a single box in each bedroom. I opened one up, and it looks like they did not run individual Cat ...
  • 373
0 votes
2 answers
2k views

Can I use my ethernet port on my pc as a phone line?

I have an ethernet port used for Internet, but since I bought a wireless adapter that port is no longer needed. So I thought instead can I use that port as a phone line and just plug a phone line ...
0 votes
1 answer
2k views

home network wall socket ethernet not connected

I have a fibre connection with a modem and one RJ45 going into the wall socket. in the common area, I have the incoming RJ45 from the fibre and additional 4 rooms cables meeting at the same spot. I ...
user avatar