[54672] in North American Network Operators' Group
Re: fast ethernet limits
daemon@ATHENA.MIT.EDU (=?ISO-8859-1?Q?M=E5ns_Nilsson?=)
Sun Jan 12 14:00:37 2003
Date: Sun, 12 Jan 2003 19:59:08 +0100
From: =?ISO-8859-1?Q?M=E5ns_Nilsson?= <mansaxel@sunet.se>
To: nanog@merit.edu
In-Reply-To: <5.2.0.9.2.20030110175111.00aa7360@mail.macronet.net>
Errors-To: owner-nanog-outgoing@merit.edu
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- --On Friday, January 10, 2003 17:53:11 -0500 blitz <blitz@macronet.net>
wrote:
>=20
> AGREED, one end and one end only, or youre asking for a ground
> loop....ground the end with the best, shortest path to earth
> ground.....in his case, that would prob be the telco room end, "usually"
> theres a decent ground there somewhere..... Mileage may differ...
Some hours reading the back issues of the journal found at
http://www.compliance-club.com will hopefully inform you why star grounding
is a thing of the past. Ground both ends. If you are afraid of ground
loops, place a heavy (as in 10-16mm2 or AWG way below 10) ground conductor
alongside the signal cable, and ground it firmly in both ends. That will
take the current away from the shields.=20
Ungrounded shileds are inefficient for EMI and RF shielding, while at times
efficient AC hum blockers.=20
And, IANAEE, but I've played with big sound systems that exhibit all these
problems.=20
- --=20
M=E5ns Nilsson Systems Specialist
+46 70 681 7204 KTHNOC MN1334-RIPE
We're sysadmins. To us, data is a protocol-overhead.
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