[NMLUG] e-net distance

[nmlug@swcp.com (Ed Heron)]

From: 	Warner Losh

>At work we make our own cables from time to time.  We prefer to buy
>them, but they have long lead times sometimes (due to internal
>ordering proceedures for the vendor we get them from).  So we wind up
>making some from time to time.  We've found that to have good success,
>you must use a good crimp tool, you must check the crimp has been done
>right (all the little copper cores but up against the end of the RJ-45
>connector), you gotta check your color codes 4-5 times, you gotta use
>our cheapo cable continuity tester and you gotta test it with a large
>FTP on a box that we have that we can swap cables on.  Usually one you
>get past the continuity tester, things always work.

  It is the continuity test that fails for me.

>The crimping tool ran about $200, but it has been worth it.  The old
>crimping tool that we had was $50 and didn't alway crimp the middle
>pins down properly.  That was a nightmare because sometimes it could
>be made to work, but you never knew when or why.

  It could be.  I don't have a really expensive crimp tool, but 
it seems to push all of the pins down.

>We've never had a problem with connectors, but we always buy the ones
>rated for cat5 as far as I know.

>Don't know if you could fill an entire meeting about this stuff,
>however.  It is the sort of thing that once you've done 10-20 of them
>it becomes a lot easier to get it right for the next one :-)

  Was just looking to compare notes after a meeting sometime.  
We could bring in our crimp tools and supplies and compare.

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end

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