Ethernet Cable Woes - On and Off every second
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Posted by on February 19, 2007, 8:20 pm
Please log in for more thread options Hi I am having some problems with a 40m CAT5 ethernet cable. When I first installed the cable, I tested it and it was working with no problems. I haven't used it in 10 months, and when I went to reconnect it I am having a problem. The connection goes on and off roughly once a second. So it will be on for one second, and then off for one second - continuosly! What can cause this problem? Could it be interference? Please help!!! Thanks Dave davetonge@yahoo.co.uk | ||||||||||||||||||||||||||||||||||
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Posted by news.motzarella.org on February 19, 2007, 9:41 pm
Please log in for more thread options Dave Yes it could be interference. I had a case where a personal cooling fan took the whole LAN down when it was switched on. On the other hand a piece of cable left unattended especially if it is subject to movement of any kind could well have developed a break during the 10 months. 1 Try shutting down all but absolutely necessary electrical devices. 2 Try substituting the cable. 3 If problem still there substitute the LAN cards in the PC's Best Paul. | ||||||||||||||||||||||||||||||||||
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Posted by Robert Redelmeier on February 20, 2007, 8:06 am
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> Yes it could be interference. I had a case where a personal
> cooling fan took the whole LAN down when it was switched on. Totally believeable if a cable near the fan had a split pair. Otherwise not. -- Robert | ||||||||||||||||||||||||||||||||||
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Posted by Doug McIntyre on February 20, 2007, 12:46 am
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davetonge@yahoo.co.uk writes: >I am having some problems with a 40m CAT5 ethernet cable.
>When I first installed the cable, I tested it and it was working with >no problems. I haven't used it in 10 months, and when I went to >reconnect it I am having a problem. The connection goes on and off >roughly once a second. So it will be on for one second, and then off >for one second - continuosly! Is this solid or stranded cable? Did you punch it down to a patchpanel/jacks or crimp an end right on? I'd bet its solid cable with ends crimped on it, which does exactly what you see usually after some ammount of time of the crimps working just loose enough. (punching it down to a jack and running a patchcable is proper). Otherwise, there could be some interference somewhere, or you might have split the pairs and not wired it per spec? | ||||||||||||||||||||||||||||||||||
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Posted by Al Dykes on February 20, 2007, 7:46 am
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>davetonge@yahoo.co.uk writes:
>>I am having some problems with a 40m CAT5 ethernet cable.
>>When I first installed the cable, I tested it and it was working with >>no problems. I haven't used it in 10 months, and when I went to >>reconnect it I am having a problem. The connection goes on and off >>roughly once a second. So it will be on for one second, and then off >>for one second - continuosly! >
> >Is this solid or stranded cable? >Did you punch it down to a patchpanel/jacks or crimp an end right on? > >I'd bet its solid cable with ends crimped on it, which does exactly >what you see usually after some ammount of time of the crimps working >just loose enough. (punching it down to a jack and running a >patchcable is proper). > >Otherwise, there could be some interference somewhere, or you might >have split the pairs and not wired it per spec? For properly wired cable, IMO, You'd have to be working right next to welding or high-power radio equipment to even *think* about interference. How do you know the "once a second" bit? -- a d y k e s @ p a n i x . c o m Don't blame me. I voted for Gore. A Proud signature since 2001 | ||||||||||||||||||||||||||||||||||
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>
> I am having some problems with a 40m CAT5 ethernet cable.
> When I first installed the cable, I tested it and it was working with
> no problems. I haven't used it in 10 months, and when I went to
> reconnect it I am having a problem. The connection goes on and off
> roughly once a second. So it will be on for one second, and then off
> for one second - continuosly!
>
> What can cause this problem?
> Could it be interference?
>
> Please help!!!
>
> Thanks
>
> Dave
> davetonge@yahoo.co.uk
>