problem with self made cable 4

[ttong]

I recently built some long cable(70ft) out of cheap cat5e bulk cable and rj45 head. Maybe the cable or head are too cheap, my connection is just not stable. The connected computer sometime just can go through router or reach other computer on the home network, even though the switch light is on and normal. And the led on the computer side is normal too. I am going to fix it. Because the cable is already in place, just wonder is that possible redo the RJ45 head will help? What usually is the problem? I am running 100Mbps.

Thanks!

Tom

 

[wires]

What usually is the problem?"

Incorrect pairing or bad termination.

The wires in a catX cable are in pairs. If you don't run the transmit and receive circuits on pairs noise problems disrupt communication. This is called split pairs.

If you hold a plug in your hand with the cable toward you and the latch down you should see the following wires in the jack from left to right:

1 white/orange
2 orange/white
3 white/green
4 blue/white
5 white/blue
6 green/white
7 white/brown
8 brown/white

If the orange pair on pins 1&2 is swapped with the green pair on pins 3&4 that is not a problem as long as they are consistent on both ends of the cable.

The important part is that pairs are connected to pins 1&2, 3&6, 4&5 and 7&8 and that the other end if the cable is done the same way.

It is also possible that you did a less than stellar job when you crimped the ends on the cable. You might want to re do the plugs or attach jacks to the ends of the existing cable and use pre-made patch cables to connect the computer and router to the jacks. Jacks are easier to attach than plugs.

Good luck!

 

[robertjo24]

What is also important is to use the right connector for the type of cable you are using.

If you are using solid cable, you should use a connector made for the solid cable. This connector will cut the insulation and grab the cable like a set of fork tines wrapping around each side of the wire.

For stranded cable, the bade is straight, with teeth. It pierces the cable, and the strands of the wire wrap around the blade of the connector as it goes through the wire.

If you use a stranded cable connector on solid cable, it can, and most likely will, provide intermittent connectivity. Your "connect" light on the ethernet port may still light, but you won't pass data properly.

I learned this from experience...

 

[wires]

What I learned from experience is to use good quality parts. Most of the good quality 8P8C (RJ45) plugs made in the last 15 years will terminate either solid or stranded. The contacts have both a "spike" and a "saddle".

I have used Panduit for the last 10 years:

http://www.panduit.com/Products/Pro...927149&Nty=1&in_dim_search=1&sid=11B25A4487A6

but the ones I previously did the same:

http://www.milestek.com/shop/product.asp?id=10 23063 BP&cid=&kwd=&l=&p=

 

[robertjo24]

Thanks WIRES, I did not know about these.