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27 votes
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What's the point of auto-sensing 10/100 Mbit/s Ethernet?

Some devices could only run at 10 megabit/s, so the device at the other end would autosense the speed to match. If a device that has a maximum speed of 10 Mbit/s is connected to a 10 Mbit/s /...
Ted Quanstrom's user avatar
24 votes
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What is this thread-like material on this Cat6 U/UTP cable?

It is used to split the outer shielding away without needing to use a sharp object which could potentially damage the wires themselves. It is commonly called a ripcord. Image taken from http://netx....
helrich's user avatar
  • 356
14 votes

What's the point of auto-sensing 10/100 Mbit/s Ethernet?

Remember 10Mbps came first, then 100Mbps, then 1000Mbps. The advantage of supporting multiple speeds and automatically switching between them is you can upgrade your network gradually without having ...
Peter Green's user avatar
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14 votes
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The maximum length of CAT6 for intranet network?

Per the ANSI/TIA/EIA 568, Commercial Building Telecommunication Standard, UTP cabling is limited to 100 meters. That length assumes up to 90 meters of solid-core (better performance, but fragile) ...
Ron Maupin's user avatar
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12 votes
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Does bridging add delay?

Hi and welcome to Network Engineering. As for "delay" vs "latency": The terms are not always used consistently. Some hints may be found here. I think generally, the term latency is used when ...
Marc 'netztier' Luethi's user avatar
10 votes
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Multiple POE over a single cable

I know this is an older question, hopefully you've solved it by now, but I wanted to toss in my two cents, for the benefit of future generations if nothing else. First of all, yes, ethernet and PoE ...
Soundy's user avatar
  • 116
10 votes

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

Its called a ripcord and is used to cut thru the outer casing of the wire so you don't have to use a knife. To those who say it is not strong enough your not using it right. Grab it with a pair of ...
user51151's user avatar
  • 101
8 votes

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

The horizontal cable needs to be solid-core cable. this type of cable gives better performance, but it is much more fragile, and it needs to to terminate in a fixed location, and not be moved after ...
Ron Maupin's user avatar
  • 99.9k
8 votes

Does bridging add delay?

Yes, a bridge / switch adds some delay to a frame - in the order of 1 to 20 µs. For switches you usually speak of latency - the delay between receiving a frame and forwarding it out another port. A ...
Zac67's user avatar
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7 votes
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Will OM4 Fiber Work with my 1GbE Fiber Transceiver?

As per IEEE 802.3 Clause 38, 1000BASE-SX requires OM2 (500 MHz·km for 850 nm) for max. 550 m reach. As a superset, OM4 is fine as well (there's little point buying OM2). With 10GBASE-SR the reach over ...
Zac67's user avatar
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7 votes
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Are LC-UPC connectors compatible with LC-PC?

Yes. PC, SPC and UPC are just different polish grades of perpendicular, physical contact connectors. Their end-faces match, so they work nicely together. In contrast, APC uses an angled surface (...
Zac67's user avatar
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6 votes

Speed of Light in Copper VS Fiber - Why is Fiber Better?

The propagation speed is often expressed as the velocity factor of a medium - the fraction of the speed of light in vacuum that you get. On the physical side, light going through a medium is slowed by ...
Zac67's user avatar
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6 votes
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How to verify CAT type?

The cable category should be printed on the cable sheath. Just having cable rated at a particular category doesn't mean the cable plant is actually rated at that category. All the components of the ...
Ron Maupin's user avatar
  • 99.9k
6 votes

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

There's several reasons: Cable Length and rack organization as explained by @John K in his answer this allow to adjust cable length at need. This also allow to organize the rack properly. Cable ...
JFL's user avatar
  • 19.7k
6 votes

The maximum length of CAT6 for intranet network?

For twisted-pair Ethernet, maximum cable length is 100 m (Cat-6A for 10GBASE-T, Cat-5e for 1000BASE-T or 100BASE-TX, Cat-3 for 10BASE-T). The only exceptions are 2.5G and 5GBASE-T where the maximum ...
Zac67's user avatar
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6 votes
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Practical limits of shielded Ethernet cable

As everybody has said, including the original question, this is a terrible idea and don't do it. I recommend some kind of fibre solution, which can be cheaper than you might think. I recently did an ...
jonathanjo's user avatar
  • 16.3k
6 votes

How can twinaxial cables be faster than CAT cables

Simply put, twinaxial cables allow only very short distances, under 10 meters. And they are used in networking, for example both 40Gb and 100Gb standards support twinaxial cables... ...up to 7 ...
JFL's user avatar
  • 19.7k
6 votes
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LC dual pair converter to 10GBASE-T

If using dual pair LC fiber to run 10GbE over a long distance, what's the best way to connect it to a server on one end which has a 10GBASE-T port? The best way is to get a server NIC with SFP+ slots ...
Ron Maupin's user avatar
  • 99.9k
5 votes

Multiple POE over a single cable

If 100 Mbit/s is enough for camera to work, You can try split single 4-pairs cat5 cable in two 2-pairs links. It can be done by 2 Ethernet splitter or by proper cable crimping. "This adapter brings 4-...
mmv-ru's user avatar
  • 774
5 votes

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

Copper cable splices are not allowed. Cabling standards are set by ANSI/TIA/EIA 568 Commercial Building Telecommunications Cabling Standard. For instance, this is for copper cabling: Only one ...
Ron Maupin's user avatar
  • 99.9k
5 votes

Can normal CAT6 be buried?

Indoor UTP cabling is not at all suitable for outdoor use. It cannot tolerate any moisture. Category-6 cabling is difficult for even professionals to install and terminate properly in order to pass ...
Ron Maupin's user avatar
  • 99.9k
5 votes
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When is "grounding" a concern when running Cat6a cables?

Category-6a cabling is UTP (Unshielded Twisted Pair) cabling. If your cable has a shield, it is something else. Any shielded cable must be properly grounded. That requires connectors and equipment ...
Ron Maupin's user avatar
  • 99.9k
5 votes

Cat6 FTP shielding

Since Category-6 is specifically UTP (Unshielded Twisted Pair), then the question of shielded Category-6 cabling doesn't make any sense. ANSI/TIA/EIA define the cable categories, and there are no ...
Ron Maupin's user avatar
  • 99.9k
5 votes
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10baseT and 10baseFX difference

10BaseT and 10BaseFx are standards of connectivity for Ethernet. 10BaseT defines the use of twisted pair cabling (UTP / STP) for Ethernet, that includes cable features, male (in cable) and female (in ...
jcbermu's user avatar
  • 4,497
5 votes
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Which is preferred: Pulling or 'walking' cable?

The usual way to do this is once you have properly set up your pathways (see ANSI/TIA/EIA 569 Telecommunications Pathways and Spaces) is to have a pull-string. You use the pull-string to pull the ...
Ron Maupin's user avatar
  • 99.9k
5 votes

Which is preferred: Pulling or 'walking' cable?

I entirely agree with previous answer that you really want a professional outfit with the correct test gear to properly pull, terminate, label and test each wire. And redo anything that fails certs. ...
jonathanjo's user avatar
  • 16.3k
5 votes

Where are UTP cable speeds defined for Ethernet?

However, I'm having trouble finding a definitive source for the recommended transmission speed for Cat 3, Cat, Cat 5e, Cat6, and Cat6a twisted pair cables. In fact, some of these sources seem to ...
YLearn's user avatar
  • 27.4k
5 votes

Fibre vs Copper short Distance

The equipment interfaces determine the speed, albeit the medium used may have restrictions on which interfaces it can be used. If you have 1 Gbps ethernet, it doesn't matter if it is copper or fiber, ...
Ron Maupin's user avatar
  • 99.9k

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