Can someone give me a quick ethernet wire config diagram? like | orange | green | stripe green| you know? sorry i cant search for it. no time to search. and my internets cutting in and out. dumn adsl
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Can someone give me a quick ethernet wire config diagram? like | orange | green | stripe green| you know? sorry i cant search for it. no time to search. and my internets cutting in and out. dumn adsl
Following the EIA/TIA 568 B standard , here goes:
RJ45 connector has 8 pins,,
when looking at the RJ45 connector with the "lip" not facing you, pin #1 starts from your left with pin #8 furthest to the right. Like this
Pin#1 Pin#2 Pin#3 Pin#4 Pin#5 pin#6 Pin#7 Pin#8
Pin#1==> color is white orange (means dominant color is mostly white w/bit of orange)
pin#2==> color is orange white (means dominant color is mostly orange w/bit of white)
pin#3==> color is white green (means dominant color is mostly white w/bit of green)
pin#4==> color is blue white (means dominant color is mostly blue w/bit of white)
Pin#5==> color is white blue (means dominant color is mostly white w/bit of blue)
pin#6==> color is green white (means dominant color is mostly green w/bit of white)
pin#7==> color is white brown (means dominant color is mostly white w/bit of brown)
pin#8==> color is brown white (means dominant color is mostly brown w/bit of white)
Ethernet uses pins 1 & 2 to transmit data and pins 3 & 6 to receive data..
All other pins do not matter,,,If you cut them off cable still works..
Also According to EIA/TIA 568B standard
the blue pair is referred to as 1st pair
the orange pair is referred to as 2nd pair
the green pair is referred to as 3rd pair and
the brown pair is reffered to as 4th pair...
Therefore, also Ethernet not also uses pins 123&6 also uses 2nd and 3rd pairs....
Hope this helps
Cheers.....
P.S.
I dont wanna get beat up on one other minor point I forgot to mention,,,
Some catagory cables have their orange/white, blue/white, green/white and brown/white..colored as all orange, all blue, all green and all brown...
Good post, gunit0072003, here's some additional info:
10bT only uses 2 pairs, but 100 and 1000bT use all 4 pairs. Also, beware, many people consistently wire up their connectors incorrectly (for example, they get the pin numbers backwards). Most of the time this works, but if you cut the cable and wire up the cut ends "correctly," it won't work. So if you're reusing cable (turning a 100' into two 50', for example), make sure that the existing connectors are wired correctly.
Oh, and no post about rj45 ethernet is complete without ascii art:
Code:_________________
| |\
| 8 7 6 5 4 3 2 1 | \
|_______ ______| \
\ |__|\ \ |
\ \ \\ \ |
\______\ \\______\|
\__\| \
\ \
\ \
\ ) <-- wire
\__/
J3r
IEEE 802.3 ---10Meg Ethernet
IEEE802.3u---100 Meg Ethernet
IEEE802.3y---100 Meg Ethernet (no one uses,,see comments below)
IEEE802.3z---1000meg Ethernet/1 gig Ethernet
IEEE802.3ae---10gig Ethernet
IEEE802.3 defines 10 meg on two pairs as stated by you and I however when it comes to 100 Meg its not one or the other,,,Let me explain
IEEE802.3u defines two flavors of 100 Meg Ethernet:
1) 100baseTX which uses 2 piars on catagory 5 wire (most popular and most widely used) and
2) 100baseT4 which uses 4 pairs on catagory 3 wire ( no one uses it , it was included in standard because many building had their wiring infrastructur with catagory 3) It uses an encoding method of 8B/6T (8 bits/6 ternary signal) which significantly lowers the signalling frequency, making it suitable for voice-grade wire such as catagory 3.
In addition, IEEE802.3y sprung up in 1997 and defined 100baseT2. This worked on catagory 3, 4 and 5 and required 4 pairs as well. (no one uses this as well, It relies upon digital signal processing chips method called PAM5x5 (4bits point to one of 25 possible values) to function over lower bandwidth cable type..
Cheers..
Hope didnt get too carried away with terminology...
P.S.
If you wire up your cable backwards it will NEVER work....
Oh and about gig Ethenet, yes it uses all 4 pairs cat5e wiring---->(1000baseT)
The Blue/Blue White pair is (historically) for Telco. The 'old' Tip & Ring.
The Brown/Brown White pair is/was used for some mainframe connections via emulator
software.
Telcos started using Cat3 in the '80s as it propogated the signal better than Silver Satin.
You cant really make that statement dcongram,
blue pair which is pin 4 and 5 was also used by token ring,,
Token Ring uses pins 345. and 6
ALso making a staright through cable, 124 and 5 was used by CSUs for T1 circuits,,
and pins 127 and 8 for DSUs for DDS circuits..
I think we beat this subject to death,,,
Cheers.. :)
gunit0072003.......
I didn't mention Token Ring (so as not to muddy the waters). But when Cat3 first came out (over 20 years ago) they agreed that Blue/blue white would/could still be for Telco.
Back then Token Ring used it's own network cable. It's only been in the past few short years they used Cat 5.
I did say 'Historically'. Things have changed. Ya had to be there to hear the Telco guys telling us how they invented Cat3.
I'm showing my age cause I was there in the '80s. Feeling pretty good cause we were replacing 10base2 with Cat3 (first generation Cat3....the clear stuff)
"ouch" says the dead horse.
Anyway, I really do think that wiring two rj45 jacks backwards will work. I seem to recall having done it, and it working. Really, does it matter what order they're in as long as each pair matches up correctly? I would be surprised if the A/D converters on the ethernet cards took the twist rate into account...
J3r,
whats your definition of backwards?
Ethernet uses pins 123 and 6...
12 to TX and
36 to RX
If you are implying that you can use any color scheme, absolutely you can do so...
The color code has nothing to do with Ethernet, its to make everyones life better
when running cable and troubleshooting diff wiring..(EIA/TIA standard not IEEE)
Maybe Im not following you,,,,I apologize if I misunderstood
Cheers
P.S
straight thru cable:
1<------>1
2<------>2
3<------>3
6<------>6
Cross-over cable:
1<------>3
2<------>6
3<------>1
6<------>2
This site has color Pictures http://yoda.uvi.edu/InfoTech/rj45.htm#straight
Wiring an RJ45 'backwards' is a Cross-over cable. Used for connecting one hub/switch to another (when no 'uplink' port is available).
Or connect 2 computers directly
Now there are auto-sensing switches that do the X-over.
Yeah, that's what I was trying to express. (Of course, you can't use *any* color scheme. For example, running two signal lines over one pair (as opposed to running one signal and one ground over one pair) will cause your cable to not work (although you *may* get a link light).Quote:
If you are implying that you can use any color scheme, absolutely you can do so...
The color code has nothing to do with Ethernet, its to make everyones life better
when running cable and troubleshooting diff wiring..(EIA/TIA standard not IEEE)
As a side note, you can use cat5 to make really long (~50 foot) serial cables for cheap.
J3r,
Yes you can use any color scheme..available to you within the UTP wire,,as long as for straight thru cable what ever colors you used for pins 1,2 3, and 6 on one RJ45 connector, they are the same on the other end,,,And same holds true for cross over cable,,crossing the appropriate pins.
I dont know what you are referring to ?????
"running two signal lines over one pair (as opposed to running one signal and one ground over one pair) will cause your cable to not work (although you *may* get a link light).
cheers.
p.s
dcongram ,
the reason why I asked that question is because "backwards" can also be referred to as a roll-over cable, where the color scheme of pins 1---8 on one RJ45 are exactly backwards/opposite of pins 1--8 on the other end.....(This is used by Cisco, their pinout for their console cable)
gunit0072003......the Cisco roll-over cable is interesting.
So....the different Twists/per/inch/per colour pair don't affect the propagation of signal in Cisco ? Or is it a short cable for console only where distance doesn't matter ?
short cable yea,,doesnt matter,,can even be cat1 also
Sorry, being unclear again. So, each pair is really one data line. (A pair is color x and colorx/white.) Sending a signal down one one wire of the pair will induce a large signal in the other wire. However, due to the differing twist rates of the different pairs, it will not induce a large signal in any of the other pairs. So, if you wire up your cable with one part of a pair hooked up to one part of a data line, and the other part of a pair hooked up to the other part of the data line, your cable will not work. As example, say your using 10bT, and you hook up:Quote:
I dont know what you are referring to ?????
"running two signal lines over one pair (as opposed to running one signal and one ground over one pair) will cause your cable to not work (although you *may* get a link light).
tx tip to orange
tx ring to green
rx tip to orange/white
rx ring to green/white
The induced signals will cause your tx signals to appear on both the tx line and rx line, and your rx signals to appear on both the rx line and the tx line.
This is very much in the weeds, and anyone who just wanted to save $ on ethernet cabling should've stopped reading a long time ago.
Here's an interesting post explaining more about why some miswired ethernet cables work, and some don't. Also very useful if you're trying to make cheap, long serial cables from cat5.
http://www.tek-tips.com/gviewthread....575/qid/416325
I got you now,,very good...
cheers :)