My journey with flat network cables

linix

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Since months ago, I got "obsessed" with flat network cables, and have been experimenting with them for various applications, from custom patch cables to using them for structured cabling.

I have experimented with different types and brands of cables and RJ45 plugs, with varying results, earlier attempts were learning to crimp the RJ45 plug heads, then to " break" the cat5 barrier (<100mbps) into cat5e/cat6 speeds, and then to incorporate them into using them for structured cabling, while still maintaining cat5e/cat6 speeds.



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The top dark grey flat cable is not suitable for use as network cable, as it is totally untwisted, the second and third one is rated cat5e (white and grey), while the last one is rated as cat6 (white color). There is still some degree of twisted pair effect in the second to last flat cable, as seen in the "uneven" surface texture of these cables.



It is a common saying that flat network cables are not reliable at longer lengths, and many people do recommend them for only short patch cables. This is true to a certain extent, reason being firstly, they are of the multiple strand cable (unlike the usual solid core round cables used in structured cabling), secondly there is not much of a "twisted pair" (which reduces crosstalk) in flat cables. There is also one type of flat cable (the dark grey cable in my picture), which is just straight cable (totally not twisted), and unsuitable for cat5e / cat6 usage (in my testing, speeds drop to cat5 speeds for lengths above 1m)

If one had DIY and "played" around different round network cables, one may have noticed that there are 2 main types of UTP round network cables, firstly the solid core version (usually used in structured cabling) which is very stiff and not very flexible (they do cause network problems if you bend them too much or "maneuver" them around often enough).

Secondly there is also the multiple strand version, these are the ready made patch cables usually sold in shops (with proper packaging), these are not usually available as those DIY versions sold by SLT shops or those DIY sellers, reason being, they are not very common on the market in entire spools and they are more costly when compared to the solid core type (so far I had noticed only one local online DIY seller selling stranded patch cables, and explaining their advantages). Their advantage is that they are very flexible, very suitable for patch cables, very suitable for frequent "maneuvering" around. If one cares to take apart these cables, you will notice that there is lesser "twisting" of the pairs of wires when compared to the solid core versions.

The commonly available flat network cables (cat5e or cat6) are very flexible, easy to "maneuver" around. Their construction is usually of the multiple stranded version, and contrary to popular belief, they do "incorporate" twisted pair" (although not as much as their round solid core counterparts). If one cares to notice, usually they are available up to a maximum of 30m only, as their performance do "drop" at longer lengths (in my own testings). For those who have used the longer lengths of flat network cables (10-20m), will find similar "reliability" (at least for the decent quality types), when compared with the usual round network cables.

In my DIY with these flat network cables, in "suitable" lengths, they do "maintain" speeds up to the gigabit standard. In my initial experiments (on several occasions), when I connected 3 lengths of 10m cat5e together (via cat6 connecting plugs) and they still maintain a cat5e speed (hovering around 650-750mbps, using software), the speeds drop to cat5 speeds (<100mbps) when I connected the fourth 10m length.

I also experimented with crimping my own cat6 flat cables, and yes, up to 30m long (single continuous length) , they still maintain speeds up to gigabit standards (in my own testing using software, they hover around the 800-850mbps mark). These testing for cat5e speeds was done using my gigabit switch (which have different colors of led for 100mbps speeds and gigabit speeds) or using the software "Lan Speed Test" ("Speedtest" results was not used as my fiber internet plan is only a 200mbps plan).


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30m of my DIY cat6 flat cable (still maintaining up to gigabit speeds), however the outcome for this particular length of cable is that it is cut into 2nos, for 2 cable runs for my structured network "project"



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The advantage of DIY network cables, you can have them as long or short as you should require.



Currently, I am doing a "rework" of my entire home network, using mostly flat cat6 or cat5e cables (cat6 for RJ45 points, cat5e for RJ11 points) for structured cabling ( 12nos of flat cat5e / cat6 cables, out of a total of 16 network points), and will be replacing most of my patch cables with my DIY flat network cables.
 

commach

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svt08g.jpg


The top dark grey flat cable is not suitable for use as network cable, as it is totally untwisted, the second and third one is rated cat5e (white and grey), while the last one is rated as cat6 (white color). There is still some degree of twisted pair effect in the second to last flat cable, as seen in the "uneven" surface texture of these cables.

The top dark grey cable is not for using as LAN cable, mainly for PABX thus you are not suppose to use them for LAN purpose.
 

SiaoAngMoh

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In my DIY with these flat network cables, in "suitable" lengths, they do "maintain" speeds up to the gigabit standard. In my initial experiments (on several occasions), when I connected 3 lengths of 10m cat5e together (via cat6 connecting plugs) and they still maintain a cat5e speed (hovering around 650-750mbps, using software), the speeds drop to cat5 speeds (<100mbps) when I connected the fourth 10m length.

I also experimented with crimping my own cat6 flat cables, and yes, up to 30m long (single continuous length) , they still maintain speeds up to gigabit standards (in my own testing using software, they hover around the 800-850mbps mark).

When a cable is defined as Cat 5/6 etc, that specification basically means the cable can carry signals of up to X MHz and therefore supports 100bT or 1GbE. The point to note however, is that the spec is defined with 100m runs without a repeater. 90m of that run is structured cable with 5m of patch cord on each end.

Patch cables have a higher loss than structured cable, so you would want to limit the length of those as much as you can. Avoid 30m runs of them for starters :)

Those connecting plugs incur loss on the signals (including increasing crosstalk), and per spec you are limited to 2, to join each patch cable to the structured cable.

You could use 3, 4 etc and it would still work, providing the length was short. As you extend the length out, they become more critical. In your case after you added the 3rd connector (4th cable) on a 40m run, the link can no longer reliably receive gigabit signals and the link drops to 100bT.

Cat 5e can support 1GbE. Cat 6 is only required for 10GbE.
 

RyoHarusaki

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Whats the purpose of having a flat lan cable?

Any benefits other than looks
 

quekky

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can the cat6 flat cable support 10gb speed?

I learnt that some cat6 normal cables are not that reliable, got a few factory-terminated that "DOA" (cant run at 10gb, but no issue on 1gb)
 

negativzero

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For structured cabling just go for round ones. Don't compromise cos you will need to use it for years. Flat cables are flexible because they are lower gauge than round ones, additionally the insulating rubber is thin and if you get moisture in them, good luck. Experiment or not, you should never use flat cables for structured cabling. It's not as hardy.
 

hj_dragon

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Go for cat 7 round cables for structure cabling as they are available now in shop in 10m length. Flat cable only suitable for near distance connection.
 

phayze

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Using those 1-2m CAT 6 flat cable, can support 10Gbps.

can the cat6 flat cable support 10gb speed?

I learnt that some cat6 normal cables are not that reliable, got a few factory-terminated that "DOA" (cant run at 10gb, but no issue on 1gb)
 

Kiwi8

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nice findings..... bookmarked first... read later. :o
 

negativzero

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Go for cat 7 round cables for structure cabling as they are available now in shop in 10m length. Flat cable only suitable for near distance connection.

There is no official Cat7 certification yet though. All the Cat7 you buy now can only be classed as Cat6/6A
 

linix

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can the cat6 flat cable support 10gb speed?

I learnt that some cat6 normal cables are not that reliable, got a few factory-terminated that "DOA" (cant run at 10gb, but no issue on 1gb)

Can I ask you some questions first?

Can a "reliable" brand round cat6 cable, after doing point to point termination (below 55m), still reach 10gbps speeds?

Can a cat6 / cat5e network actually reach 1000mbps (after all the structure cable run and termination), or is it possible that all the "specs" could actually be based on a length of "unfinished" network cable?

Is it possible that there may be some cat6 structured installations (using round cat6 cables) that actually could not even reach 1000mbps speeds (don't mention 10gbps)?

Is that the reason why many who do structured network installations or keystone conversions only mention "up to gigabit speeds" (although I did see one stating his keystone installations, "up to 10gbps", when the network cable were installed by HDB, and not by him)

IMO, the "bottlenecks" in the quest for 1000mbps (or 10gbps) network speeds are actually not the "unfinished" cables themselves, but rather the hardware devices in between, although sometimes it could be due to the "way" that the network cable was installed or terminated (I have seen my fair share of these "horror" pictures online).

Thus is it possible that quite a number of people are living in the "myth" that using cat6 cables means the ability to have 1000mbps speeds (or even up to 10gbps speeds), when actually it is only the ability for network speeds up to gigabit speeds?

In the current consumer grade of "gigabit" hardware, I do not have the means to test out for 10gbps speeds (I don't even have a 1gbps fiber plan to start with)

FYI, there are some network cables out there, stating as cat6, that are the CCA type (copper clad aluminum), with these cables, the network speeds are a big question mark.
 

linix

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For structured cabling just go for round ones. Don't compromise cos you will need to use it for years. Flat cables are flexible because they are lower gauge than round ones, additionally the insulating rubber is thin and if you get moisture in them, good luck. Experiment or not, you should never use flat cables for structured cabling. It's not as hardy.

Besides lower gauge, the main reason flat network cables are flexible because they are of the multiple "stranded" construction, unlike those solid core network cables used in structured cabling.

I remembered reading one post in the forums, saying that his flat network patch cables lasted him for 5 years and going without problems.

In terms of "durability", I guess a round network cable, housed in a "protective" PVC trunkings, does have added "durability" compared to a "bare" flat network cable?

Anyway I had already finished my structured cabling using majority of flat network cables (longest run is 14m+).

Maybe I am the first to do that, but everything does have its first time, and maybe in time, the "online saying" that flat cables should only be used for very "short" lengths will be no more, and it will be the "norm" to use it for structured cable runs, for "cosmetics" purposes (within length limits of course)
 
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