Questions tagged [rj45]

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1answer
534 views

Gigabit RJ45 loopback not working (100 Mbps ok)

I made myself a loop back plug as per When I plug it into a 1Gbps port on 100/1G switch the port does not light up. 100 Mbps port on 100 Mbps switch lights up no problem. The obvious problem could ...
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1answer
41 views

LAN cable-tester's LEDs fire at 3 and 6 (without passive side attached)

I have hardware question. I am running a duplex CAT7 cable from a patch panel to a wall socket. One connection works, the other struggles when I test the cable. Below I describe how I tested the cable ...
26
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2answers
5k views

How does the RJ45 crimping tool work?

There are plenty of videos and descriptions about how to use an RJ45 crimping tool. I've seen a few, and I have even tested a crimping tool, but I still don't understand how it does what it does. What ...
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1answer
48 views

Patch panel with J45 Cat6 female/female connectors very fragile connection

I have a patch panel with the following female/female CAT6 RJ45 snap-in connectors in my cabinet: It basically serves as a pass-through for the cables at the front to the cables at the back and vice-...
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0answers
38 views

Wiring for a SFP rj45

I have a CISCO Catalyst 3560G and I bought two SFP to RJ45 Copper Module for Cisco GLC-T/SFP-GE-T Gigabit 1000Base-T Transceiver. I plugged one Module into the CISCO switch and the other into a ...
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3answers
2k views

I want extend CAT5 cable, more than 100m

I have a track like 130 meters. CAT5 cable limit is 100m. Is it possible to cut it in half and get a switch in the middle of the track? Will it work?
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1answer
148 views

Ethernet wiring of pairs for a 100mbit configuration

In Ethernet wiring, for a 100mbit configuration, if Pairs C & D are connected at one end instead of pairs A & B, would it function? Computer: Eth A ==| B ==| ...
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1answer
2k views

Powering a Patch Panel [closed]

So I'm in the process of replacing all the telephone wall plates with ethernet plates so I will have the choice to hardwire to the internet from any room if I so desire. right now I have my internet ...
13
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1answer
5k views

Do I really need a DB9-RJ45 adapter to connect to a Cisco router console, and if so, why?

I have an Enterprise grade Cisco router and an HP laptop. I would like to connect to the router on the console port to conduct out-of-band management. The console port on the router uses an RJ45 ...
-2
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2answers
2k views

N00b alert: Cat 6A keystones with Cat6/Cat5e wires and Cat6A wires with Cat6/Cat5e connectors [closed]

So first off, I have no idea how this ish works but I got myself deep down with it. I was building my new house and in the garb of moment, when I was thinking of having Ethernet connectors all over ...
0
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1answer
2k views

Can I use Cat6 and Cat5e female jacks together?

Having one on each end, as long as I use the same color code for both? for some reason it's not working, both jacks have different A and B codes, but I just used the same on both being: Left column: ...
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2answers
385 views

Running CAT5e F/UTP together with power, without shielded plugs [closed]

I just ran about 20-30 meters of Solid CAT5e F/UTP cable from a switch to a shed where i have a server. About the last 1/3 of the way, its running together with a mains extension cable, that provides ...
0
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1answer
123 views

is there a difference plug setup between cat 5 and cat 5e? [closed]

Is there a difference in either the RJ45 plug or the wiring into the plug (for 568B) between a Cat 5 and Cat 5e cable, used for connecting a router to a computer? Here's a little background info. I'...
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0answers
728 views

Can Cat6A connector fit to normal gigabit network switch?

Cat 6A cable is thicker than Cat6 cable. For a Cat6 cable and connector, we can plug into any network switch that has RJ45 connector even a 100Mbps network switch. Just wonder if I use Cat6A cable ...
-1
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2answers
269 views

Find out physical network layout?

I'm dealing with some weird networking issues at a workstation in a large warehouse. There is a preexisting drop that is being used for a machine. I found the other end of the wire by using a tone ...
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1answer
5k views

Color coding to connect rj45 socket and rj45 connector to make an ethernet extension cable [closed]

i want to make a cable like this: What should be the color coding to make this Ethernet LAN Network extension Cable. I have a rj45 socket and a rj45 connector but there indicator on rj45 female ...
1
vote
2answers
669 views

Cisco console, is possible to have DB9 split out to multiple RJ45's?

Cisco Serial Console cables are simply DB9 to RJ45. Of course many people have now come to use a variety of DB9 to USB adapters to get around many machines not having serial ports. But I'm more ...
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votes
1answer
281 views

What is the most proper way of wiring RJ45 for Cat6/LAN?

I currently know of three different wiring patterns for RJ45: T568A, T568B, and USOC. Simply put: Which is the best method for creating a Cat6 cable? From my research, it seems like I should use ...
-1
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4answers
6k views

Which way up does an ethernet port go? [closed]

I've scoured the internet, but nobody seems to be able to decide whether RJ45 sockets should go with the release catch facing up or down. For instance, Netgear has their ports this way: But Cisco ...
4
votes
1answer
10k views

What will happen if a PoE powered patch cable is plugged into a normal RJ-45 plug?

I have a couple PoE powered keystone jacks sticking out of a wall in a computer lab. We're going to remove /block the excess ones eventually, but for now I'm worried about somebody plugging a laptop ...
-1
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3answers
987 views

RJ45 female to male fault

i have the following - common - problem, on one end of the cable, there are RJ45 males T586 A which are connected to a 8-port switcher, on the other end, there supposed to be RJ45 females _T586 A ...
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2answers
35k views

Using Serial to RJ45 cable to connect to a 3Com switch

I have always use a serial to serial port or serial to usb to connect to switches. Normaly they came with RJ45 to usb cable in cases when I had a RJ45 cable to serial. But now I have 3Com switch ...
2
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0answers
1k views

How to convert RJ45 wiring to RJ25

I have a RJ45 cable wiring. I need to use it to connect my printer to network. But the network socket that was available in my printer is RJ25 socket. I thought that i can wired cross cable which is ...
4
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4answers
2k views

TIA 568A vs. B Wiring for Long Ethernet Run

I have a long Ethernet run (about 280 ft/85 m) that goes through a conduit between two buildings. On each end, I have an APC Ethernet surge protector that is grounded to the main ground for each ...
2
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3answers
798 views

Robust RJ45 for frequent connections/disconnections [closed]

I am looking for robust RJ45 cables/connectors in an environment where people come and go and plug in and out. After a month of usage, the connectors are worn out and fall out and you need to replace ...
4
votes
4answers
2k views

Converting an Ethernet Coupler to a Crossover Adapter

I want to add a crossover to my network toolbox. Aside from an actual an actual crossover cable, I like the idea of an adapter (figure 1). There are crossover adapters available online, but I’m ...