Questions tagged [cabling]

For questions about network cable installations used in a physical building or as used in a computer network topology. This tag is suitable when your question is about network cable installations, that are used in buildings to distribution frames and data centers or long distance cabling that is buried into the ground.

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5answers
214 views

Is it common for rackmountable servers to have fibroptic input and output? or is it cat 5 and you have to convert after?

If the switching hub is in the floor above the server, I've heard its best to use fibre-optic cabling to avoid interference from unrelated electrical cabling in the ceiling for lights etc... Is it ...
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2answers
165 views

Practical limits of shielded Ethernet cable

If I run S/FTP Ethernet cable ran next to 120V conductors (inside 3/4" conduit) for about 70 ft. is there chance that I'll have a usable data connection? I'm fully aware that this is a terrible way to ...
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2answers
351 views

What can I infer about a network connection using a cable tester (if anything)

I have a NS-468 cable tester for testing cables. This works fine but if I connect just one end of a RJ45 cable to a network, I only get 4 lights. This seems reasonable as I suppose 4 pins are for ...
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3answers
253 views

Custom CAT6A cable not reaching 1000mpbs

I purchased this CAT6A cable: https://www.amazon.co.uk/gp/product/B01M0VB4YD/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1 and did some network cables by myself in various lengths ranging from 1 ...
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3answers
185 views

What classifies as crossover cable?

The definitions I've read say that crossover cable is cabling which the receive and transmit pairs are swapped around. My question is based on the fact that beyond this, I've seen some diagrams which ...
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3answers
10k views

Why exactly is soldering discouraged in UTP networks?

I am aware that punch-down junction boxes and other solutions are the recommended methods for continuing an UTP cable that is too short, but you are not in control of replacing (for example, solid-...
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1answer
491 views

Will cutting a 50m CAT6 cable in half achieve a gigabit connection?

I have a new CAT6 cable that's 50 metres long and only performs at 100 megabit. I've tested it in a variety of gigabit ports and it never allows a gigabit connection. Is it the length that's the ...
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1answer
547 views

Fibre vs Copper short Distance

I am thinking of running Fibre optic from one room to a Nearby ONT/Router, I currently have about 15-20 meters of Cat 6, With a Gigabit UFB internet plan. With a short distance of around 20 meters ...
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3answers
815 views

Looking to Extend Fiber Network

The cable in this image: is 75ft and is for my ISP. I'd like to replace it with one that is 2,000ft and run it buried outside to give internet connectivity to another building on my property. I've ...
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1answer
201 views

Externally Rated - CAT Cables - how to tell

How can you tell a CAT6 cable is externally rated? It is a requirement for a project I'm working on. Many thanks, Vlad
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2answers
2k views

Confused about the results from the cable tester

A little bit of backstory, just in case you want some context. In the last couple of weeks the network at least internally has slowed down. As far as I can tell the only things that have changed has ...
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3answers
10k views

How do I build a USB-to-rollover RJ45 Cisco console cable?

I haven't found a guide on the web and am wondering if anyone can point me to a how-to or show me the steps. Basically, I'd like to craft something like this: http://www.amazon.com/CableRack-Rollover-...
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2answers
140 views

Would using a cat6 rj45 coupler strip VLAN out when connecting 2 VLAN aware devices ?

Ive got a project where i have to use some existing wiring and some new wiring as we can not run new wiring in one part of the building. At the moment my network diagram looks like this Becuase i ...
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2answers
285 views

Cabling and Topology Confusion

Does the Cable types determine which type of frame it will carry? Just for a example can't i use a fiber cable to create a star topology which carry ethernet frame? I know this might sound bizzare ...
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1answer
968 views

Using a G. 655 with a G. 652.D fiber cable?

Is it possible to use a G.652.D with a G.655 fiber for just a small distance (less than 10 m) for the interconnect only (from the patch panel to the switch) ? If yes or no, what will happen ? And for ...
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3answers
5k views

Preferred method splicing together UTP cable

I was wondering what the preferred method is for 'butt'splicing together two pieces of <100m UTP cable - or if that is discouraged in general. Relaying the cable is not possible, but it does need ...
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1answer
95 views

Can bad cabling affect the overall network?

TLDR: Can a handful of problematic lines negatively impact the performance of the network as a whole? ... or would any problems stop once it reaches the switch? Longer Version (background): A ...
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1answer
245 views

Connecting two PCs together via External Ethernet cards (T568A or T568B?)

Hi, I need some expert networking advise here. I have to connect two different PC together via a unique ethernet path. Please see attach picture. I however cannot go thru a switch or a hub. **my ...
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2answers
117 views

Do CAT5e structure weaken Voice signal when RJ-61 termination is used?

RJ-45 & RJ-61 does have different pins termination. Straight-A, Straight-B, Cross-Over (A & B each end) for RJ-45 (Data). Paired at middle going out method meaning 4 & 5 pin + 3 & 6 ...
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1answer
1k views

Connecting two switches together over longer distance fails

I am working in a small business, but the office is quite large. For ages, everything ran over Wi-Fi here, but it's simply not reliable enough (Walls blocking signal, high latency, etc). Some days ...
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1answer
762 views

Two ethernet jacks causing each other problems? [closed]

In our new office all of our ethernet jacks are "double jacks" (two ethernet ports on one plate on the wall ), each with their own CAT6 cable wired to a series of identical dual jacks (we didn't have ...
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1answer
364 views

Connecting a router with cat 5 cable to a cat 7 network

I have a cat 7 network but the router, switch and APs are hooked up to it using cat 5 cables. Does this reduce the advantages of a cat 7 network?
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2answers
841 views

Can you run serial, POE and HDbaseT through a patch panel?

Short question Can we run Serial, HDbaseT and POE through a patch panel ? The patch panel will also be serving the data network. Long question (with more background info) Ive got a patch panel ...
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1answer
212 views

SFP for old, 200m fiber run

Fairly new with setting up fiber optic so bear with me.We have a single mode fiber optic running around 200m. After doing some research I have come down to purchasing this SFP: DLINK DEM310GT 1000BASE-...
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1answer
129 views

According to appropriate standards, which Ethernet cable jacket colours should I use? [closed]

We have the following connections. User desks to patch panel to non-PoE switch CCTV to patch panel to PoE switch WiFi access point to Patch panel to PoE switch Floodlight to Patch panel to PoE switch ...
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1answer
76 views

Calculating stranded and solid cable length (for 22AWG)

Reading up on how to calculate cable lengths as a follow-up to my previous question, I understand that you have to use (102-H)/(1+D) to calculated the stranded length (C) and H+C to calculate the ...
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2answers
351 views

Cat6A Junction Boxes in the US

I'm looking around the internet and can't seem to find a Cat6A junction box available in the US. Is there a reason they aren't sold in the US? Basically, I have a Cat6A cable that is run to the wrong ...
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1answer
91 views

How to tell if network cable is LSZH

I just bought a 305 meter Cat 6a S/FTP LSZH Solid network cable. The cable I received is a Deltaco TP-53 cable, but I cannot see anywhere that this cable is really LSZH (Low Smoke Zero Halogen). I ...
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2answers
120 views

Cat 5e wiring Type A incompatibility with Type B

I am not an engineer but I’m having problems with my small network in my business. I have 11 computers after 13 yrs am having major problems. My network keeps shutting down, and my dental software on ...
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1answer
311 views

Aerial fiber to replace underground fiber optic cable

I have aerial fiber optic cable only. Can I use this cable underground because I have excess aerial cable but I have no underground cable? In short, is aerial fiber optic cable insulated enough to be ...
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1answer
147 views

Will Cat6 make a difference

I have 7 rooms wired with Cat5e. I plan to attach the other end of the cables to a GigaBit switch (Netgear GS108). This leaves one port on the switch. I will attach my router to the remaining port. I ...
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1answer
588 views

Latency of AOC vs passive DAC

Long time ago I heard from friend that on really short distance using optical links makes no much sense because comparing to passive connection optical interfaces introduce another layer of hardware ...
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1answer
54 views

Fiber Cable speed tester

How to select Fiber Cable (multi-mode or single mode). For example, if i need fiber backbone around 700 meters with 2 GB speed, how i choose, om 2, om 3 or OS 1 & Os 2. Is there any calculator or ...
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2answers
609 views

RCV Err increases and port blinks amber

Sometimes gigabit port starts blinking amber light and when i do sh int count err i can see how "RCV err" growth. SW-Floor-2#show int gig 2/0/27 counters err Port Align-Err FCS-Err ...
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1answer
694 views

Splicing g. 655 with g. 652?

I have question regarding what type of cable shall I use in this situation to minimize the loss as much as possible. We have an old G.655 cable that is being used in the 1310 Wavelength and we want ...
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1answer
2k views

Is F/UTP cabling compatible with an STP patch panel?

I've been given the job of wiring up a small office network, and been given F/UTP CAT6 cable to work with. Is a patch panel describing itself as "STP" compatible with this cable? As I understand it,...
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1answer
153 views

Is there any difference between International and United States patch cable?

I'm looking to buy a Cat 8 patch cable. I found a cable that I like that meets ISO/IEC 11801 Class I and Class II but it is not compliant to TIA Cat8 (As defined in ANSI/TIA-568.2-D) which has ...
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1answer
89 views

Is it possible.. Partial Duplex: 100mb one way & 1000mb the other

I have a potential application where the vast majority of the traffic will be in one direction, and, concurrently, I have a potential alternate use for a pair of wires in the cable that would ...
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3answers
171 views

CAT3 and CAT5 in the same conduit. Cross-talk potential?

Can I run telephone cables and standard UTP CAT5/6 in the same conduit? Will it cause any interference or cross-talk?
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1answer
144 views

PoE cable defective?

Need some expert advice.. So some time ago I got water damage, my PoE switch was completely flooded. Since then, I noticed that I could not rotate my cameras anymore via Blue Iris (IP Cam soft), and ...
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1answer
35 views

Are LJ6C outlets suitable for cat6 cabling or only cat5e / is there a different version for cat6 cabling?

Are LJ6C suitable for cat6 cabling / is there a different version for cat6 cabling ? I'm aware that you cant easily use an RJ45 cat5e jack for cat6 cable as the cable for cat6 is thicker, is this ...
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3answers
2k views

Does the 568A vs 568B standard affect the transmitting and receiving wires on the CAT-5 cable?

So I'm studying networking using the Head First Networking book. I was reading about CAT-5 cable and the RJ-45 connector. The book says that the green pair receives data and the orange pair transmits ...
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1answer
34 views

Which type of ethernet cable for external runs to cameras and home office? [closed]

I'm sure this question has been asked a hundred different ways, but I've been struggling to piece the various bits of information together and finding quite a lot of misinformation about ethernet ...
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1answer
74 views

How southern cross cable can transmit IP/ Ethernet signals keeping in mind the physical limitation of Ethernet cables?

The Optical fibre can transmit/receive any ethernet frames or packets faithfully for 5kms. However, the cables laid in the southern cross i.e. under the sea beds must be several miles long. The ...
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1answer
34 views

Is there a network cable tester device that tests the cables with realistic frequency instead of on/off leds?

I am not looking for a specific product recommendation. I am looking for a category of cable tester devices, so I can do a targeted search. I have an rj45 cable tester that tests the ethernet cables ...
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1answer
30 views

Why do higher speed links require a stronger signal?

I understand that higher-speed optical links require a stronger signal. For example, 16 Gbps Fibre Channel transceivers have to transmit at -1.3 dBm and receive at -10.3 dBm. If it falls below that, ...
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1answer
176 views

Max. patch cable length to connect two switches?

I tried to research this, but cound't find a specific answer to my scenario. So I tried to understand the necessary background knowledge myself, hopefully I came to the right conclusion. If I want to ...
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1answer
785 views

Crossover Cabling - Reversing TX and RX Signals [duplicate]

It is often said that crossover cables 'reverse the transmit and receive signals' compared to straight through cables. However I am yet to see an actual explanation of why the reversal of signals is ...
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3answers
10k views

Split an existing CAT5 Cable into a Y cable without using a switch? [closed]

I have a long cable coming from my other room and I want to connect this cable to a raspberry pi and my laptop. I know I can just get a basic switch to solve this problem. But is there such a thing ...
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1answer
111 views

Using home phone cabling as home network [closed]

I've just moved into a new build apartment. Each room has a female telephone port (431A?), connected to a female telephone port in my electricity cupboard. My BT telephone line then comes into the ...