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Cat 7 ethernet? - Page 2

post #11 of 23
Quote:
Originally Posted by 100PARIK;14351276 
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!

providing both ends of that 1 cable are the same, it makes no difference. If you had an 'A' end and a 'B' end then you'll have issues (you've gone and made a 10/100 crossover cable - which won't work properly for gigabit).
post #12 of 23
Quote:
Originally Posted by 100PARIK View Post
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!
Each port has it's own negotiation for link speed. One port sync'd at 10 mbps will not affect the other ports at gigabit.
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post #13 of 23
Shweet!!! Thanks for info guys!
    
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post #14 of 23
Quote:
Originally Posted by Chris13002 View Post

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
That isn't incorrect, that is the name of the connector. Go look up the name of the plug, it is an RJ-45 connector, phone lines are RJ-11.
post #15 of 23
Quote:
Originally Posted by thrasherht View Post
That isn't incorrect, that is the name of the connector. Go look up the name of the plug, it is an RJ-45 connector, phone lines are RJ-11.
not technically - it's just compatible with the phone line standard RJ-45.

The network plug is just a modular 8P8C connector.
post #16 of 23
Quote:
Originally Posted by the_beast View Post
not technically - it's just compatible with the phone line standard RJ-45.

The network plug is just a modular 8P8C connector.
I would like to share this with you, I just took this picture using my phone, it is out of the CompTIA A+ series Managing and troubleshooting networks.



I guess the A+ Exams are lying to us then. Hmmm how about that.
post #17 of 23
you'll find it's quoted wrong all over the place. But doesn't make it right - the connectors used for PC networking were never certified or registered - so they aren't RJ-45s.
post #18 of 23
Quote:
Originally Posted by the_beast View Post
you'll find it's quoted wrong all over the place. But doesn't make it right - the connectors used for PC networking were never certified or registered - so they aren't RJ-45s.
so essentially it is about the same as the difference between a chevy and a GMC truck, just the name. So either works.
post #19 of 23
A+ exam is horribly basic these days. I have mine from 2004 but took the first half yesterday with only the knowledge retained from being on this site and hit a 825/900

Remaining vaguely on topic:
http://en.wikipedia.org/wiki/Registered_jack
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post #20 of 23
Category 7 has been in a complete mess and should be voided until the fate is known but at this time it is having a hard time being accepted even for the 40Gb/s. CAT6a is the current latest standard and can achieve full 100 metres of the IEEE 10Gb/s standard unlike CAT6 which can only in short distance.

EDIT: A+ looks to prove that Fiber is only light. Incorrect two ways are LEDs and laser. They might produce light but that is too vague.

EDIT2: RJ45 is the connector for the cable just like RJ11 for the telephone line.
Edited by wolf_08 - 7/26/11 at 11:00am
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