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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.

0
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1answer
8 views

Reliable transfer but unreliable auto-negotiation?

I have two servers, the first with a built-in and add-on 10gbit port, and the second with built-in gbit and add-on 10gbit (Syba AQC107), communicating through a feed-through rated for gigabit ...
0
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0answers
12 views

Is pair cable always full duplex? Can it be half duplex at double the bitrate? [duplicate]

This is probably a newb question, forgive me. For pair cable, there are two signals that can be sent: following that logic, it seems like you could have two situations: full duplex at bit rate X in ...
0
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0answers
8 views

3G EA CLICK board doesn't respond to at commands anymore [closed]

I am sending AT commands to a 3G EA CLICK cape(which has a Quectel UG95 chip). The problem is that the cape doesn't return anything. I have the cape connected to the PC through a USB-to-UART converter(...
2
votes
2answers
55 views

Advice on Patch Panels

We are thinking of getting a switch for our data center that blows air from the ports to the power plugs. However, we use a hot-aisle and cold-aisle layout. Our other switches blow in the opposite ...
2
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2answers
47 views

How to extend CAT6 ethernet 2m from ceiling down to server rack?

Previously, we had a 6RU comms cabinet near the ceiling. We've now replaced this with a full-depth server rack sitting on the ground. The plan was to remove the old patch panel, and punch it down ...
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2answers
96 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 ...
1
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2answers
38 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 ...
0
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1answer
44 views

Cat 6 life expectancy [closed]

how long will cat 6 cable survive outside if it is not an external grade cable. No sunlight touches the cable but only cold temperatures of around -10c, everyday every year. the cable has no holes, ...
4
votes
2answers
165 views

Noticeable limitations or penalties from using inline fiber couplers

Is there any noticeable limitations or penalties from using inline fiber couplers, such as those in a patch panel to join multiple fiber runs together? Currently I have switches joined together ...
10
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2answers
2k views

Does bridging add delay?

If I use a bridge to perform traffic sniffing like man in the middle will the bridge add a delay? And what word should I use delay or latency?
1
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2answers
105 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 ...
4
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2answers
91 views

Does it work to use CAT6 cable between two CAT5 cables?

I have two Cat 5 cables pre-installed in the walls. I need to connect two rooms, in which each room has its own set of in-wall Cat 5 cables and a slots. Does it work to use a Cat 6 cable to connect ...
2
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2answers
121 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 ...
18
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6answers
3k views

What is this thread-like material on this Cat6 U/UTP cable?

Does anyone know what this thread-like material to the right on the picture is? Does it have anything to do with grounding? It is a Cat6 U/UTP cable.
2
votes
1answer
177 views

Stacking Dell N3000 with and without stacking cable (distance)

First question here. I have a new scenario that I am not sure on how to achieve. I have a stack of two Dell N3024 switches (our core stack), that I need to add two more units to. However, these two ...
2
votes
2answers
96 views

Effect of large amount of bare ethernet pairs on network performance

I have a client who has been experiencing a significant amount of performance issues in regards to their telemarketing floor. On my initial assessment, I found that where the ethernet is punched down, ...
1
vote
1answer
59 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 ...
0
votes
1answer
61 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 ...
1
vote
1answer
63 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 ...
3
votes
1answer
379 views

To shield between patch panel and switch or not?

All network cables run from the outlets to the server room. They run next to power cables so it was decided to shield them. In the server room, they are going to be connected to a patch panel which ...
1
vote
3answers
85 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 ...
-1
votes
1answer
124 views

How is this Patch Panel even working [closed]

I recently took a Jr. Developer position at a small company. I've been asked to solve a network issue at one of our remote warehouses (I'm the interim IT / Network guy). I did a little bit of Panduit ...
3
votes
2answers
302 views

How close can Ethernet cables be to power line if in parallel?

How close can unshielded CAT 5e/6/6a cables be in parallel to 110V power lines in rooms of common residential/commercial buildings before interference becomes an issue? If proximity between the two ...
2
votes
2answers
63 views

Intermittently loose communication with upstream managed switch

I have a network for a small company that has been running without an issue for a few years. We have Cisco IP phones on VLAN 100 and computers on VLAN 1. The VLANS are auto assigned by the Cisco ...
3
votes
1answer
1k views

Best Practice for Connecting 3 Switches to Router

I am wondering the best way to connect 3 switches to a router in a server rack. The router is a Cisco RV320 (Dual Gigabit with two static IPs) There is three 48-port Ubiquiti EdgeSwitches, A Datto ...
6
votes
1answer
109 views

Do low temperatures cause problems installing new optical wiring or fixing broken optical cables by splicing?

One of our supplier reported big problems splicing (using this) a broken outdoor optical fiber cable when temperatures around or little bellow freezing point. They refuse to install new optical fiber ...
2
votes
1answer
71 views

Is the patch/crossover type of cable really unimportant in a GBe network on a structured cabling with a passive switch panel?

As known, the Ethernet standard from the GBe range also prescribes the auto-detection of the cable type (in the sense of it is crossover or ordinary cable), thus there is no really need to use ...
2
votes
2answers
72 views

110 Block Frames and TIA-606-B

I have a large industrial work site with numerous Switch- and Control-Rooms containing horizontal and vertical patch panels, switches, etc. There has historically been no formal identification or ...
1
vote
1answer
59 views

What is the purpose of twinax cables and how does it differ from straight through and cross over cables for the connection of unlike and like devices?

What is the purpose of Twinax cables and how does it differ from straight through and cross over cables for the connection of unlike and like devices? I want to know whether there is any difference ...
1
vote
1answer
291 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 ...
1
vote
2answers
66 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 ...
4
votes
3answers
180 views

Where are UTP cable speeds defined for Ethernet?

I have consulted several Network+ exam preparation books, Network+ practice exam questions, the IEEE 802.3-2015 standard, and several older TIA-568 standards. However, I'm having trouble finding a ...
1
vote
1answer
101 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 ...
0
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1answer
67 views

Fiber Optic between two residential buildings [closed]

I'm not sure if this is the right forum, but thanks for your consdieration. Also, I apologize for the speculative nature of the question, I'm looking to extend internet to another building about ...
4
votes
1answer
265 views

Does TIA/EIA-568 permit patch cabling totals longer than 10m?

[Light edits to emphasise versions] What are the exact requirements of TIA/EIA 568 cabling standard as regards to the length of patch/work area cables? Specifically, I see from my 2001 copy ANSI/TIA/...
1
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2answers
111 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 ...
1
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2answers
87 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 ...
3
votes
2answers
150 views

Which is preferred: Pulling or 'walking' cable?

I'm running some basic lines at a factory and I have basic training on punchdowns and where I am allowed to run the cable(in this case, CAT5e/6). I need to run a maximum of about 200 feet of cable. ...
1
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3answers
3k 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-...
1
vote
1answer
65 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 ...
-1
votes
3answers
129 views

What was the initial reason to design two different types of Ethernet cables cross-over and straight-through? [duplicate]

I do not understand what was the purpose behind those two cable standards. Cross-over cable and Straight-through cable What was the initial purpose that they were build for and what was the ...
2
votes
4answers
1k views

Does coaxial cable transfer data both ways?

Does coaxial cable transfer data both ways although it has 1 wire in it? How coaxial cable is different from Ethernet cables? And why does Ethernet cables have two wires for transmit and two wires ...
1
vote
3answers
627 views

10baseT and 10baseFX difference

What is the difference between 10baseT and 10baseFx are those types of cables or the boxes that are used to plug the cables?
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3answers
118 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?
1
vote
1answer
231 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 ...
5
votes
3answers
7k views

The maximum length of CAT6 for intranet network?

Recently I purchased CAT6 cable with a length of 150 meter. I bought another CAT6 with a length of 148 meter. I joined both the cables using RJ45 cable coupler. I tested it using LAN TESTER, and ...
1
vote
1answer
479 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 ...
3
votes
2answers
234 views

Cat6 FTP shielding

I received a edexcel patch panel for a cat6 ftp cable, I was puzzled by the diagram. It shows I should cut away the foil. I am used to pulling the foil back and placing it under the bar clamp. Is it ...
1
vote
1answer
333 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 ...
2
votes
1answer
3k views

When is “grounding” a concern when running Cat6a cables?

I'm educating myself on how to terminate Cat 6a cables. I've seen some articles talk about "grounding" requirements because of the "shielding" in the cables. But is grounding a concern if I'm just ...