Questions tagged [cable]

The questions tagged that way are for the physical aspect of the cable, like length limitation, physical properties, tubing, installation, etc..

Networking cables are networking hardware used to connect one network device to other network devices or to connect two or more computers to share printers, scanners etc. Different types of network cables, such as coaxial cable, optical fiber cable, and twisted pair cables, are used depending on the network's physical layer, topology, and size. The devices can be separated by a few meters (e.g. via Ethernet) or nearly unlimited distances (e.g. via the interconnections of the Internet).

There are several technologies used for network connections. Patch cables are used for short distances in offices and wiring closets. Electrical connections using twisted pair or coaxial cable are used within a building. Optical fiber cable is used for long distances or for applications requiring high bandwidth or electrical isolation. Many installations use structured cabling practices to improve reliability and maintainability. In some home and industrial applications power lines are used as network cabling.

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Is this Cat5 or Cat5e

I bought some Cat5e cable for my house data wire however the coil that is delivered clearly says Cat5. The shop say it is 5e as they don't stock 5. Can anyone tell for sure?
ChrisBull
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Trying to convert a Dell T420 Single Drive to Redundant. Looking for validating my steps

I have a Dell T420 and read different ways to upgrade it to redundant PSU's. Details I saw on Dell's website a thread where a user asked how to upgrade to a redundant PSU versus the single 550psu. They received a response that explained the parts…
PokemonGo
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Cabling for SAS controller and SuperMicro BPN-SAS-825TQ

I´ve managed to get one of the SuperMicro low-end server to my lab. It is chassis 825TQ-R740LPB with a BPN-SAS-825TQ backplane. The specification document is saying, that this backplane is SAS compatible. But the server has a motherboard with only a…
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Port negotiation issues, IP Radio tower

Got a ubiquity IP radio on a tower. One side of the link negotiates 1G but the other side has issues. It will negotiate 100Mb after a reboot every now and again (very random) but mainly sits at 10Mb. I can iperf the link and saturate it on 100Mb…
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Analyzing an ethernet cable for low negotiating speed

I'd like to find out why my cat 6a refuses to negotiate 1000 speed. I have a 15 meter long U/FTP CCS cat 6a Ethernet cable installation. I have analysed the cable with a multimeter and each strand (white, blue, green etc) measures around 3.6 ohm…
Jaco
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Must a patch panel be initially terminated in the rack?

If Cat6 Ethernet cables were terminated to a wall mounted patch panel, is there a method to move the patch panel to a rack (without having to cut them and reterminate them)? Is a patch panel coupled to the rack, so that you need to have your rack in…
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Why do cable propogation delays exist?

I've got a timing card which emits a pulse per second (PPS). The specs for the card state there is a delay of this PPS of approximately ~7ns for each meter of the cable, or ~200ns per 30 meter cable. What I don't understand is why this delay is…
zephyr
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Back panel display ports on Z800, connecting to VGA monitor

I work for a charity, we've received a HP Z800 workstation. Need to connect a 15-pin VGA monitor. However the the back panel has only the following ports (as shown in the two images) connected to display. Can anyone tell me what these ports are…
Whirl Mind
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Why are serial console ports on network switches 8P8C/RJ45 sockets?

It has always seemed a bit strange to me that the console ports on networking gear are 8P8C (popularly referred to as "RJ45" even though that's not strictly applicable here) connectors and require an adapter to connect to a DE9 serial port. What is…
tgies
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I can't connect to internet via lan cable because 2032 battery died and my bios bios info is now empty

I have a compaq CQ61-112SL from about 5 years now... the main battery is almost dead, doesn't keep more then 10 minutes. anyway my problem is that my motherboard battery didn't have any more energy left a few days ago and since then I can't access…
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How can i certify cabling with a cat5 certifyer if the cabling is mixed cat5 and cat6 thanks

Hello I'm getting ready to certify some cabling and realized it is mix matched cat5 and 6 but my certifier is only for cat5. So I wonder if I needed a speacial certifier to do that thanks.
Wat Then
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Buying cables and small electronics component offshore

I am wondering whether anybody have experience with buying cables and small electronics off shore. The site I have in mind is alibaba.com. It is similar to ebay and the quotes I'm getting seem to be pretty good. However, I'm a bit weary with…
Yada
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Wiring back-to-back ethernet sockets

I need to wire two cat 6 sockets, each in a different room, so that a switch connected to each, via patch cables, can communicate. What cabling standard should I use: 1) T-568A at both ends? 2) T-568A at one end and T-568B at the other? 3) Some…
Brian
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Ethernet cable only works A to B, not reversed. Why?

A custom ethernet cable with both connectors wired as T568B only works when connecting A to B, but not reversed, i.e. when switching ends and connecting B to A. A is a Mac, B is a 1Gb TP-Link unmanaged switch. Tried with different Macs and switches.…
elmimmo
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300' Fiber Optic Cable not passing Data

Just installed a 350' Fiber Optic cable for a client. Customers IT company came in to install the AT&T router and said the fiber optic cable is not working. IT company installed the router with a short patch panel cable at the junction block and…
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