Questions tagged [cable]

For questions about physical cables used in a computer network topology. This tag is suitable when your question is about a network cable. Examples: Twisted pair cable, Fiber optic cable, Coaxial cable, Patch cable and other specialized network cables.

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4
votes
1answer
5k views

CAT6 cable AWG23 seems too thick for plugs [closed]

I have 500 feet of what is described as Cat6 Solid STP Copper Bulk Cable (White) Here are the full specs CAT6 STP 8-Conductor, Bulk, PVC Jacket, (FTP) Shiedled AWG23, Solid-Bare Copper,(UL/ETL) ...
5
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3answers
6k views

Can normal CAT6 be buried? [closed]

I have the leftover from a long spool of CAT6. I'd like to run a line to my garage, which is separate from the house. Can "typical" CAT6 be directly buried, or should I buy one of the "waterproof" ...
1
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4answers
2k views

Can I run two separate internet connections over one Cat5e cable

I have two ISP's coming into the building. One is a T1 that is going to be used for VOIP phones. The second is high speed internet connection going to be used for internet. Each office has one cat5e ...
0
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1answer
833 views

Cat5 Gigabit not working [closed]

I have an 8-pin cable running through my wall (from basement to first floor) which was probably an old phone cable, which I terminated with RJ45 plugs on each end - resulting in a Cat5 cable. I ...
5
votes
1answer
312 views

Is there an IEEE recognized method for splicing Category 5e or 6 cabling?

Is there an IEEE recognized method for splicing Category 5e or 6 cabling, and maintaining the expected data rates? Such as the junction box shown in the link below. https://www.lowvoltagecables.com/...
1
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1answer
132 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 ...
6
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2answers
3k views

Full Duplex and Collision Domain

I have a very basic query on Collision Domain and Full Duplex Mode. There are two types of logical topology: Ethernet and Token Ring . Whenever we read about Ethernet the first thing that we are ...
1
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1answer
339 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?
2
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1answer
252 views

Wiring question at POTS DEMARC point

This is my first time using stack exchange. Let me give a brief backstory. I work at a company, we have multiple phone lines. One of the phone lines was cancelled but had a phone hooked up to it. I am ...
1
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1answer
171 views

Velocity(factor) of different cable types - Collision domain

I need to calculate the max length of a collision domain. There is this formula. In short: maxLength = (c * velocityFactor * 512 Bit)/(vBit) c = speed of light velocity factor = ? vBit = bit ...
1
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1answer
142 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 ...
1
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2answers
474 views

SFP port with fiber optic cable

I have a switch with 2 SFP port and I want to connect a fiber optic cable to the switch. I need to connect the cable only on one SFP port or on both SFP port?
3
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4answers
5k views

Why are patch panels used (instead of connecting directly to a switch)?

For example, at work, a network is made up of 10 workstations all connected to a switch through a patch panel. From my inexperienced opinion, it is extra cost that can be avoided; however, as I do ...
0
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1answer
2k views

I've crimped a CAT5 cable, test is OK, but no internet :( [closed]

I have crimped today the RJ45 CAT5 cable and it doesn't work, my TV can not receive any DHCP response (get no IP address and has no internet connection). After crimping, I have tested the cable and ...
1
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1answer
53 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 ...
1
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2answers
281 views

Shut down the port when someone plug out the cable

We have Cisco Catalyst 2960-S switches, And we noticed some employees plug out the internet cables to connect them to their Lab top. I want the command that I can use to make the port shutdown when ...
2
votes
1answer
122 views

Are most Cat. 6 RJ45 plugs really Cat. 6 certified?

I've seen all sorts of RJ45 crimp plugs advertised for use with Cat. 6 cable. I know Cat. 6 has more stringent requirements on the cable than Cat. 5 or 5e. It seems like there would similarly be more ...
3
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1answer
2k views

Cable management for a small LAN with a 24 port patch panel

I have a 24-port gigabit switch, a couple of 1U horizontal cable management bars and a 24-port patch panel in a rack. I've made a clip-art version of my present setup below: The gray thing in the ...
1
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1answer
57 views

Can cat6 be used as a 1:1 replacement for telephone cable?

Can cat6 be used as a 1:1 replacement for telephone cable ? Ive seen it done multiple times and its worked fine, but can it be considered a 1:1 replacement or are there some downsides of doing it ?
2
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1answer
148 views

How to verify CAT type?

There are so many twisted pair cables around, which are claiming to be a certain class/category, e.g. CAT6. How can verify the CAT type number? Cutting them is maybe not the most practical solution.
1
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2answers
547 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 ...
3
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4answers
7k views

Can one fiber be used to transmit and receive signals? [duplicate]

Like I specify in the title, I want to know that one fiber can be used to transmit and receive signals. Whether it can or not, why?
3
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3answers
4k views

Difference between patch cable and UTP

I already searched for answer to this, but I have seen so many different answers to this.. Does patch cable mean all UTP Cat5e, Cat6 etc? Or is it something else? Thank you for any help.
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3answers
168 views

What is the name of this cable?

The cable is plugged on a Zyxel VES1724-56 DSLAM. It is a VDSL cable. http://imgur.com/a/aUNuZ http://imgur.com/a/OoJZk
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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 ...
1
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3answers
1k views

Do straight-though and crossover still have any play in today's business

I'm studying for the CCNA and this PDF talks about knowing straight-though and crossover and where they should be used. Do Ethernet types T568A and T568B still matter in networking today? I was ...
2
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4answers
575 views

Splitting WAP PoE connection for IP phone and laptop

I am not sure if this is the correct community, please let me know if I got it wrong. I am new to PoE. I've inherited a network where in one office there is a PoE wireless access point. This device is ...
1
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3answers
144 views

What is your experience using 3rd-Party 10Gig Media Converters with Cisco equipment?

We have just received a device with 10Gig BaseT ports (for copper cable with RJ45 endings) that needs to be connected to a Cisco Nexus 5548. This switch only has SFP+ ports and we're connecting them ...
0
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4answers
669 views

Can two 4P4C rj11 socket turned into one rj45 socket?

I have been planning to set up a wireless network in my room. But due to old cables installation. I couldn't do it. So I thought of an idea of combining two rj11 port into one rj45 port. Is it ...
12
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3answers
23k views

Why do I need a crossover cable to connect devices of the same type?

I know that a crossover cable should be used to directly connect devices of the same type and patch cable is used to connect devices of different types. But I never understood why is it so exactly? ...
2
votes
2answers
1k views

serial Connecting two network wall sockets

First of all, I am not a network engineer, and my knowledge of physical network installations is quite limited ( I am a programmer ) , so please excuse me if my question is too trivial / naive / ...
8
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6answers
20k views

Can a single optical fiber support full-duplex communication?

Can a single-mode single optical fiber support full-duplex communication, or does it have to be two fibers, one for each direction?
2
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1answer
737 views

Flexibility of a UTP cable

Is there a metric/specification that shows flexibility/elasticity of a utp cable? I have to install a utp cable and it will have to go around some sharp corners. From what little experience I have ...
49
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14answers
217k views

Does having a longer Ethernet cable slow your connection?

As the title suggests, Does a longer Ethernet cable slow your connection down?
1
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3answers
8k views

Fiber cable mixing single mode with multi mode

Does following scenario work? We have single mode fiber running between two building, but we have MMF patchcord connected to SPF (SFP-10GBase-SR). [SPF]---MMF----[=======SMF======]----MMF---[SPF] I ...
1
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2answers
7k views

Connect a LAN cable to LAN1 & LAN2

I connected a LAN cable from the LAN-1 port to the LAN-2 port owned by the same router. Then really weird things happened: For 10 - 15 seconds, nothing happened, none of the lights on the modem are ...
1
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2answers
144 views

Can an Ethernet cable still work properly without the coating, indoors?

I need to squeeze an ethernet cable under a door (as I can't drill a wall, Powerline adapters are out of the question, and Wi-Fi has too much of a packet loss to use here), but it doesn't fit whole. ...
3
votes
2answers
2k views

rj45 - simulate interface “link up” state

My colleague told me today he saw some sort of RJ45 dongle that intended to simulate a "link up" state for the connected interface (for testing purposes). Can this be achieved by doing a specific ...
0
votes
3answers
9k 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 ...
3
votes
3answers
28k views

Multiple POE over a single cable

I try to solve a problem using Power Over Ethernet technology to Power supply differents devices. I would like to avoid to buy new router and try to make it work without any expensive costs (if ...
3
votes
2answers
313 views

Ethernet wiring job done wrong

I am a systems administrator by trade. Though I have done a few wiring jobs, this is not a task that I claim to be a professional at, either by training or experience. However, ethernet wiring isn't ...
0
votes
1answer
229 views

5GbE over fiber optic cable with SFP+ [closed]

I have to build a 5GbE link with a SFP+. Can i use the one that is rated for 8Gbps? And what kind of NIC should I use on host PC?
1
vote
1answer
653 views

What typically causes delay skew?

What causes delay skew in a typical copper network? From Wikipedia: "The Delay Skew test tests for the difference in propagation delay between the fastest and slowest set of wire pairs. An ideal skew ...
4
votes
3answers
645 views

Direct-burial cable: fiber vs cat-5e/ cat6

Apologies if this isn't the right place for this question. I'm converting an out-building to a home office. The structure is approximately 175 feet from the house. We're digging a trench for a 240V ...
1
vote
3answers
782 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 ...
2
votes
1answer
555 views

Difference between a bridge and just a cross over cable between two machines?

Is there a difference between a bridge and a crossover cable between two machines?
6
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2answers
2k views

What is “Twisted pair with loading” cable?

What is "Twisted pair with loading" cable ? please explain and if possible please share a picture. Thanks, Note: Below image is taken from: Data And Computer Communications - 8e - WilliamStallings
2
votes
1answer
111 views

Can someone help me make sense of this network analysis?

One of my small IT customers hired a consultant to save them money. They use voip and have video surveillance cameras the owner watches remotely. They also have about 10 people in the office at any ...
4
votes
1answer
621 views

Patch cable wiring/colors

I cut a cat5e patch cable to put a female end on the cable, but the colors for the male piece are: orange, orange/white, blue, blue/white, green, green/white, brown, brown/white. The patch cable ...
1
vote
2answers
624 views

New crimped UTP cable connects and disconnects

I was just making new short UTP cables, and I was happy that when I checked the cable through an Ethernet Cable Tester, all 8 wires were straight to each other and was perfect. When I plugged the UTP ...