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Cat 7 ethernet?

post #1 of 23
Thread Starter 
So I was browsing newegg and saw a [bold]CAT 7[/bold] ethernet cable. So naturally I looked up the wiki on cat 7 to see what it is. Apparently, in theory, it can reach speeds up to 100 Gbits. Not the current generation, but like I said, in theory. Apparently its rated by IEEE to be 10 Gbit. So my question is; if we can get freaking ethernet, and this twisted pair would suck to do manually 800pxcat7.jpg

is there any real use for fiber?

Also cat 7 cable are DIRT cheap.
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post #2 of 23
Fiber has distinct advantages over copper. Fiber has greater bandwidth capabilities, can carry much longer distances, is virtually immune to EMI, and is actually cheaper than copper. The testing and installation equipment is a little more, but I say fiber wins the battle. Copper also only has about 25 lbs of pulling tension before it is damaged, while fiber is much tougher. Working for an AV integrator, we use fiber a lot to carry audiovisual signals. It is a much better solution than twisted pair (copper cat5/6).
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post #3 of 23
While you guys are on the topic and we have an expert here... which configuration is better and why for home CAT6 network 568A or 568B?

rj45-cable-568a.gif
    
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post #4 of 23
Quote:
Originally Posted by 100PARIK;14351080 
While you guys are on the topic and we have an expert here... which configuration is better and why for home CAT6 network 568A or 568B?

rj45-cable-568a.gif

it doesn't matter as long as both sides are the same.

I like B, but it makes no difference.
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post #5 of 23
Quote:
Originally Posted by 100PARIK;14351080 
While you guys are on the topic and we have an expert here... which configuration is better and why for home CAT6 network 568A or 568B?

rj45-cable-568a.gif

It doesn't matter. It really doesn't even matter if you follow these guidelines or not. It's just a standard to keep things consistent. I typically use B, because it's what I remember.
A straight through cable is identical on either ends, while a crossover has pins 2 and 6 crossed.
100mbps Ethernet will only use 2 pair, while 1000mbps will use all 4 pair.
post #6 of 23
Quote:
Originally Posted by 100PARIK;14351080 
While you guys are on the topic and we have an expert here... which configuration is better and why for home CAT6 network 568A or 568B?

rj45-cable-568a.gif

Does this really make a difference? I mean, as long as both ends of the cable are wired the same? At work we use 568B, just because its easier to accomodate the wires after untwisting the pairs.
post #7 of 23
phonegeek_2167_20411873
here are two accepted standards for 8-wire data network jacks (commonly and incorrectly called "RJ-45.")

ANSI/TIA/EIA-568-B "Commercial Building Telecommunications Cabling Standard" lists both wiring configurations. T568B is the most prevalent for commercial installations, and was used by AT&T for the original Merlin phone systems. To help you remember, associate "B" with "Bell."

ANSI/TIA/EIA-570-B "Residential Telecommunications Cabling Standards" recommends T568A

•If the installation is residential, choose T568A unless other conditions apply (see below). The two inner pairs of 568A are wired the same as a two-line phone jack.
•If there is pre-existing voice/data wiring (remodel, moves, adds, changes), duplicate this wiring scheme on any new connection.
•If project specifications are available, use the specified wiring configuration.
•If components used within the project are internally wired for either T568A or T568B, use that wiring scheme.
•Make sure both ends of a cable are wired the same way.


Jack Wiring

Pin # T568B T568A
1 White/Orange White/Green
2 Orange Green
3 White/Green White/Orange
4 Blue Blue
5 White/Blue White/Blue
6 Green Orange
7 White/Brown White/Brown
8 Brown Brown
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post #8 of 23
Fiber can easily outdo copper UTP in both range and speed, and is also immune to EMI.
Cat6a is also rated for 10gbps.

With the advent of SSDs there is beginning to be a purpose for 10gbps in the home, hopefully should drop price for switches/etc in the near future.

Also as to the above, the majority of wiring will be with the B standard.
The wiring doesn't matter so much but your pairs must be on the same twists or your cable won't work.
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post #9 of 23
Cool! But, lets say I'm running a 24port gigabit switch with 20 cables connected. 19 of them are straight through 568B with both end configured the same but by mistake one cable is 568A also CAT6. How would this affect the whole network and performance. Would it throw a 1000mb/s down to 100mb/s or what would happen? Does running as the slowest link apply to this situation?

Thanks!
    
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post #10 of 23
Wow didn't even realize there was a CAT 7 yet
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