Also, make sure you wire the cable according to an EIA/TIA standard.
It's not really an issue with shorter cables, but with longer runs you
can get some nasty crosstalk and signal degradation. I used to just wire
my cables straight through, but I soon found that this is generally a
Bad Idea (tm) on longer runs. It might work, but it might not. A good
example (with pictures) is at
http://www.duxcw.com/digest/Howto/network/cable/cable5.htm (for both
straight through and crossover wiring.) Jason is right, if it works with
one cable and not with others, the fault is with the cable. The great
thing about making your own cables, however, is that if you screw one
up, you can just chop off the ends and start over. ;)

-Ryan

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On
Behalf Of Jason Smith
Sent: Thursday, November 01, 2001 1:50 AM
To: 'SigLinux'
Subject: Re: [Siglinux] Ethernet switch weirdness


Said Spencer Ogden on Wed, Oct 31, 2001 at 07:28:26PM -0600,
> The Dlink router I have, which I imagine is very similar, seems to 
> have no
> problems with a couple ~50ft runs and one 75-100ft run.
> 
> Spencer
> 
> On Wednesday 31 October 2001 07:11 pm, Emanuel Masciarelli wrote:
> > 100 is over the standard length (which I believe is 12 feet).

Standard 10BaseT cable length is up to 100 meters.

Same for 100BaseT.

To the original poster: if your cable is home-made, are you sure that
you made the cable properly?  It took me a few tries before I got that
cutting-and-crimping business down.

Generally, if you replace a working cable with a new one, changing
nothing else, and things don't work, then you can be pretty certain that
it's the cable.

Also, if you are connecting two hubs (switches, routers, ...) then you
need a crossover cable to get the TXes and the RXes in sync.  (The
uplink port in some hardware is basically a crossover port, as is the
port in your ethernet card.)  If you're doing this yourself, check the
internet for proper RJ-45 crossover wiring.  Be sure you follow the
instructions: 10baseT is picky about which wires twist around each
other.

Oh yeah; you already did this once.  Nevermind about the crossover
stuff.  But you may wish to redo the longer cable just in case.

-- 
fingerprint: 740F B8D9 DF20 362C F5BC  CDE6 6923 5A48 7657 541F lynx
-source http://www.ece.utexas.edu/~jhs/public_key.gpg | gpg --import


_______________________________________________
Siglinux mailing list
[EMAIL PROTECTED]
http://www.utacm.org/mailman/listinfo/siglinux

Reply via email to