Installed RJ45 connectors wall . Now running on the network only 10Mbps [full duplex] [wall jacks]
Q: Hi!
I have a Linksys 4port router and my computer worked fine two runs at 100Mbps. Instead of a wire running to my room to my brothers along the wall, we setup connections (such as telephone connections, but for RJ45 cable) and passed the RJ45 cable from the wall. The computer is connected to the terminal (which is linked to a remote terminal, connected to the router) works only if the network is set to 10Mbps full duplex instead of 100 Mbps full duplex. Jack says on the CAT5 and the wires seem right because I can connect to the grid and things to 10Mbps, but once I set the NIC to 100Mbps, the small “network unplugged” thing pops up. I tried passing a wire directly from the PC to the router and of course it works at 100Mbps. I much rather have the connections because it looks “cool”, but these connections seem to be the problem. I called a friend and he knows a company with a small network that has the same problem. I do not understand why this would be a problem since technically, these connectors simply plug the cable from the PC to the thread of the router. The wire between the terminals is approximately 30feet so it is not the length of the problem as a 100BaseTX can have a 328 meters cable. Im completely amazed. If anyone have an idea why I can not run at 100 Mbps or even more suggestions to try in Windows (PC ever Win2k and the other was just an upgrade (formatted and installed) WinXp), please help me! Thanks in advance!
guy
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Re:Sorry to hear about that guy. Registered RAM isn't cheap. At least you aren't buying it at prices from 3 years ago…..although it looks to be moving that way again. Thank god its not moving fast.
I finally broke down and invested in a SCSI drive and controller. WOW. Programs load freaky fast, and I haven't been able to task this Cheetah X15-36LP. Wonder what this thing would do in a RAID 0 setup…….
guy, how hot does your rig get? Motherboard temps? CPU temps?
EMMSYS: Any updates? What happened?
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Re:<< suggests that a lot of 3com+Tiger/ThunderMP incompatibilities (and probably others as well) can be traced back to a bug that crops up when you disable onboard IDE. >>
guy,
Interesting. Thanks for the heads up. I'll look at that for my next step if I fry a stick again. The history has been about 30 days or so before death, so if it makes it past that this time, I'll consider it solved. If not, I'll try re-enabling the IDE controllers. I'll also pass the info on to Crucial.
guy, NCNE
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Re:Other things to add to the above:
Use solid cable if possible. Stranded cable is more flexible, but its electrical properties are pretty sad compared to solid cable, and in most wall jacks and many tips, stranded cable will just not make solid contact.
Btw, concerning your dual-CPU box…it looks like you're just using SCSI (rock on, bro!), so you might have the onboard IDE disabled. I'd suggest you re-enable it; a report at theinquirer.net suggests that a lot of 3com+Tiger/ThunderMP incompatibilities (and probably others as well) can be traced back to a bug that crops up when you disable onboard IDE.
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Re:<< So how do you like the Tyan Tiger? >>
guy,
It rocks when it's not eating RAM. Fried three Crucial 256MB sticks so far. I've been working with Crucial's test lab guy trying to figure out what's going on (he's got similar reports in). Last change I made was yanking my 3Com NIC and replacing it with an Intel Pro/100. Strangely, he said he's found a correlation between the 3Com, the Tiger MP and failure of Micron RAM. Been 18 days since I changed the card, so far so good.
guy, NCNE
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Re:Yes, That's correct. EVERY component (even the litlle crimp-on ends) must be rated to at least Cat 5 spec for 100 meg. The plates, the cable the connectors..everything.
You also have to make sure that no more than 1/2" is unjacketed and/or untwisted. No bends in the cable sharper than a 2" radius, no crushing of the external jacket, no kinks, twists, or nick in the jacket.
There's lots of rules, these are the first set of "biggies."
FWIW
Scott
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Re:Wouldn't the quality of the jacks also be a concern? If they aren't cat5 rated or data grade rated or whatever wouldn't you ahve problems? I ran a t1 into a voice grade biscuit block and it worked ok, but it would only run 10mbps on our 100mbps network. I'm not the one who tested that, but I know that it's wired correctly, it's just cat3 rated or somethign liek that.
edit: I didn't mean the t1 would run 10mbps, I plugged the system that would later be connected to a t1 into our network to configure it, and it ran at 10mbps.
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Re:guy!!! YOU BUILT MY COMPUTER!!!! So how do you like the Tyan Tiger?
Ok, back to the thread. Just a couple of things, some of them probably not even relevant. Keep your wire away from florescent lamps, like the tube kind you find in an office. I know, you probably don;t have those, but……
Just a thought… Straight from the router to the other computer and everything is just fine. If you plug it into the connection you have in the wall it bombs. Make sure you have a link light on the router and the NIC. Check and doublecheck your wiring in the wall. I am 90% sure your problem is physical (your wiring). Check your punchdowns, your patch cables, and plug the cable into a different port on the router to make sure its not the router.
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Re:100Mb is much less forgiving about wiring anomalies than 10Mb. For example, I have seen a 'straight-thru' cable (not keeping twisted pairs together) work with 10Mb just fine, but 100Mb wont even get a link light.
Almost all jacks are marked with the colors, so be sure you followed the instructions exactly.
Are you using the same cable to plug into the jack that you used to connect directly? You are obviously using an extra cable from the other jack. Be sure the cables are wired properly by looking at the colors. They should be in order:
WhtOrn/Orn/WhtGrn/Blu/WhtBlu/Grn/WhtBrn/Brn
In other words, pins 1+2 are a pair, 3+6, 4+5, and 7+8. This is the quickest way to stop 100Mb from working. I'm sure someone here can provide a link to some nice color diagrams.
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Re:Is the entire network wired to the same standard; 568b or 568a? Jacks crimped securely? Not too much lead in the wire? No cuts in the wire?
guy, NCNE
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Tags: full duplex, wall jacks