Just re-wired a LAN with 16 computers. All run directly to a new 10/100 auto port sensing dlink 24 port switch. Most lines run from the wall jack to the switch directly. 4 are just cable from cubicles directly into the switch without keystones. Every computer needs to run at 10Mbps not 100 to connect to the network/get an ip from router. The cabling is new CAT5e cable ...running at lengths from 30 feet to 80. All computers cannot get 100! Is it the cabling?? It was wired on the rj-45 plug: (s= stripe) Orange O Green G Blue B Brown Br The first is a Sripe then alternating till end Took a while to figure out the keystones. I see where there could be a problem. But even the computers with just a cable and no keystone dont go? any ideas??

keystones? You mean punchdown blocks? Color coding doesn't really matter since this is straight thru. Just as long as each end is the same and you have not untwisted the wire too much before the rj45 connector. Proper installation would have had all home runs go to a punchdown block. You would use patch cables to go from there to the switch. You might want to get the runs tested to see if they are 100mb compliant with a cable tester. But I would suspect since all of them only do 10mb its a configuration issue with the switch and nics. Set one stations nic and the switch port it connects to both to 100mb full duplex. Do NOT use autonegociate. Now what do you get?

"Every computer needs to run at 10Mbps not 100" "All computers cannot get 100!" I really don't understand what ur saying. You need them at 10mbps which they are but you cant get them to 100 for some reason? I dont understand that.. Anyways Go through every node like wanderer and set it to 10mbps not automatic. A lan has to be on all the same speed for it to work so its not like a few will be 100 and some 10. either all 100 or all 10 Its not the cableing. cat53 supports 10/10/1000 mbps and the jack is perfectly fine

Got to disagree uselessmitch - a LAN can be a mixture of 10/100/1000.

Sorry, you can't wire the cable staight across by color pairs. One of sequences is 1 - white/orange 2 - orange/white 3 - white/green 4 - blue/white 5 - white/blue 6 - green/white 7 - white/brown 8 - brown/white normal signals is pair 1 - 1-2 pair 2 - 3-6 Your method has the second pair 3 green/wh paired with 6 blue/wh Those leads are not twisted together You have unbalanced lines, therefore, transmission losses.