I am wiring a small LAN and I want to install WITHOUT a patch panel. In other words, I am running a cable right off the switch to a wall-jack where I will use a patch cable to connect to the PC. Since I am not using a patch panel, I am using a "straight" color combination on both ends of the drop. I am using w/orange,orange, w/blue,blue,w/green,green,w/brown,brown on the RJ45 end that connects to the switch and then repeating the same color combination on the wall jack end so that the colors match exactly with the patch cable. I am getting a steady blink on the hub (on-off-on-off-on-off...)and a "Disconnected" on the PC. Can someone tell me what I'm doing wrong ??
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RJ45 wiring wall-jack to switch (no patch panel)??
- Thread starter itr0754
- Start date
Nothing wrong with skipping the patch panel for a small LAN.
Just for grins, drag the switch over near the PC and plug them together using a known good cable. That way you know the port on the switch and the NIC are good.
Next, it's time to start looking for interference somewhere along the cable run -- flourescent lights will wreak havoc, and running right next to electric isn't good either.
Make sure you didn't nick the cable while pulling it.
Double or triple-check your jack and plug wiring (I've screwed that up too many times...)
Just for grins, drag the switch over near the PC and plug them together using a known good cable. That way you know the port on the switch and the NIC are good.
Next, it's time to start looking for interference somewhere along the cable run -- flourescent lights will wreak havoc, and running right next to electric isn't good either.
Make sure you didn't nick the cable while pulling it.
Double or triple-check your jack and plug wiring (I've screwed that up too many times...)
mikeydidit
IS-IT--Management
If you are using Cat5 jacks, the color code should be blue,orange, green, brown for 568B or blue, green, orange, brown for 568A. On your switch end you need to wire it on the pins 1.white/orange, 2.orange/white 3.white/green 4.blue/white 5.white/blue 6.green/white 7.white/brown 8.brown/white. This would be if your jacks are using 568B configuation.This may sound confusing. There was a post done not to long ago in here about color codes and wiring schemes. Check it out and it will also help.
Mikey
Mikey
daronwilson
Vendor
Yes...again.
First this is not the best way of building a network, you should be using wall jacks and a patch rack, then flexible (stranded) patch cords. But....
Second...ethernet transmits on one pair, and receives on another pair. This is important. Pins 1 and 2 are a pair, and Pins 3 and 6 are a pair. Note that you cannot put them down in the order you described without splitting a pair. While it may work for short distances and low speeds, it just ain't right and it will cause you problems later.
So, looking at the modular plug with the pins up and the little latch thingee down, holding it in your hand so the wire exits the plug to your left:
______________
| --|1
---------------| --|
wire | --|
---------------| --|
|______________|8
Please pardon the ASCII art, I know there are 8 pins not four as shown, but you should see how to hold the plug.
The top pin is pin 1, and bottom is pin 8.
Wire should be:
white/orange - pin 1
orange/white - pin 2
white/green - pin 3
blue/white - pin 4
white/blue - pin 5
green/white - pin 6
white/brown - pin 7
brown/white - pin 8
that is 568B configuration, it should not make any difference for a patch cable, but if you wanted 568A you would wire it:
white/green - pin 1
green/white - pin 2
white/orange - pin 3
blue/white - pin 4
white/blue - pin 5
orange/white - pin 6
white/brown - pin 7
brown/white - pin 8
You might try searching the forum, this comes up every couple weeks and we answer it again, there are better descriptions and links to pages showing the color layout.
Good Luck!
It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com
First this is not the best way of building a network, you should be using wall jacks and a patch rack, then flexible (stranded) patch cords. But....
Second...ethernet transmits on one pair, and receives on another pair. This is important. Pins 1 and 2 are a pair, and Pins 3 and 6 are a pair. Note that you cannot put them down in the order you described without splitting a pair. While it may work for short distances and low speeds, it just ain't right and it will cause you problems later.
So, looking at the modular plug with the pins up and the little latch thingee down, holding it in your hand so the wire exits the plug to your left:
______________
| --|1
---------------| --|
wire | --|
---------------| --|
|______________|8
Please pardon the ASCII art, I know there are 8 pins not four as shown, but you should see how to hold the plug.
The top pin is pin 1, and bottom is pin 8.
Wire should be:
white/orange - pin 1
orange/white - pin 2
white/green - pin 3
blue/white - pin 4
white/blue - pin 5
green/white - pin 6
white/brown - pin 7
brown/white - pin 8
that is 568B configuration, it should not make any difference for a patch cable, but if you wanted 568A you would wire it:
white/green - pin 1
green/white - pin 2
white/orange - pin 3
blue/white - pin 4
white/blue - pin 5
orange/white - pin 6
white/brown - pin 7
brown/white - pin 8
You might try searching the forum, this comes up every couple weeks and we answer it again, there are better descriptions and links to pages showing the color layout.
Good Luck!
It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com
AvayaNovice
Vendor
Splitting pairs does some damage over long distances because it nixes the entire idea of twisted pair cabling.
- Thread starter
- #6
daronwilson
Vendor
Yes it certainly could. If you don't have the signals on a pair, they tend to bleed over to adjacent pairs and create noise. By twisting the two wires together in a pair, it keeps that signal close to the pair and it doesn't couple to adjacent pairs as badly.
So, only put the signals on the two pairs, ALWAYS make cables and connections on quality wire (none of that flat satin stuff) and ALWAYS use one of the standard patterns for terminating your pairs and it should not cause you a problem.
Good Luck
It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com
So, only put the signals on the two pairs, ALWAYS make cables and connections on quality wire (none of that flat satin stuff) and ALWAYS use one of the standard patterns for terminating your pairs and it should not cause you a problem.
Good Luck
It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com
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