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Questions tagged [rj-45]

RJ45 is a standardized telecommunication network interface for connecting voice and data equipment to a service provided by a local exchange carrier or long-distance carrier.

111 questions
34
votes
6 answers

How to unplug a network cable that's stuck?

I have plugged a network cable into my PC to temporarily adjust some settings on my router. Now I can't unplug it. The cable is physically stuck in the RJ45 port. I've tried squeezing every part of it but it won't come out. Any suggestions for how I…
Nathan Osman
  • 2,372
26
votes
5 answers

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 5 from each one but instead have Daisy chained…
Shygar
  • 383
24
votes
7 answers

Can a huge coiled LAN cable have some trouble for transmitting a signal?

Let's say I have a long (> 30m) LAN cable, that connect two (very close) devices. Could some of the unused wire, disposed as a huge coil, cause any issue ? I'm thinking about the special wire layout that would create a magnetic field (like in an…
tigrou
  • 943
17
votes
3 answers

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 through copper... how is that different from a…
abcjme
  • 459
14
votes
10 answers

"Modern" Ethernet over coax

So, I've just bought a house. It's reasonably new - built in the early '00s. One of the features that got built in was a cable TV drop in every room. The cabling is gorgeous - there's even a wiring cabinet of sorts in a closet where the cables…
Electrons_Ahoy
  • 2,611
12
votes
3 answers

Did I use this RJ45 to USB cable correctly?

I bought this RJ45 to USB cable: USB to RJ45 Console Cable RS232 Serial Adapter for Laptop Computer Cisco Router USB RJ 45 8P8C Converter Console Cable 1.8m 3m. I connected one side of the cable to the USB port of my laptop, and the other side to…
Erel Segal-Halevi
  • 2,245
11
votes
6 answers

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 the house. I have a Cat 6 wall socket, and my…
Bananawon
  • 135
9
votes
7 answers

What's wrong with my custom LAN cable?

This question is basically a continuation of this previous question. Never mind, here's the deal: I've made a LAN cable that goes through a wall, but it doesn't work. The cable is roughly 10m/30ft long. I crimped both ends myself according to this…
Torben Gundtofte-Bruun
  • 18,646
7
votes
2 answers

SFP 1000Mbps vs 1000Mbps RJ45

Whats different? They both offer the same speed don't they? I'm asking because we have a switch with 4 SFP 1000Mbps ports and we are buying a new server and was wondering if it's worth paying extra to use one or 2 of the SFP ports.
Mint
  • 168
6
votes
2 answers

Can I plug my standard phone into an ethernet jack?

I just moved into a new house and it's wired for ethernet. There's a junction box that has a "Bridged Telecom Module TM-8" in it. My cable modem's phone jack is plugged into the "Line In" on that box and their are 8 slots all running to various…
Micah
  • 333
5
votes
2 answers

Is serial RJ45 to USB a standard?

I can't find any resellers here in Sweden for the RJ45 to USB cable from Current Cost. Are such RJ45 to USB cables covered by a standard so that I could buy one from another vendor? It would also be great to know if it works in Linux / Ubuntu. It…
Jonas Elfström
  • 225
5
votes
2 answers

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, and the other with the green on the red's…
ispiro
  • 1,651
4
votes
1 answer

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 found a cable that is 10pin RJ-45(48?)-to-USB. The…
Shankensteinium
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  • 8
3
votes
2 answers

Can Cat6 UTP stranded cable fit regular Cat6 Jacks?

I have some stranded Cat6 UTP cable and want to use it to wire an Ethernet connection to a faceplate in a wall. Normally you use Solid rather than Stranded cable for this and I am concerned that the Jacks in the faceplate won't take the stranded…
Howard May
  • 131
3
votes
0 answers

Ethernet cable speed differs if connected one way or the other way

I have an issue and i don't know what's wrong. I have an ethernet cable Cat 7-A and when using it on my desktop computer I only get 100 mbps connection. When I plug it into a brand new laptop, if I connect it one way I get up to 100 mbps but if I…
JOJOJO
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