[2044] in linux-net channel archive
Re: Networking without a hub or a router/repeater
daemon@ATHENA.MIT.EDU (H. Peter Anvin)
Mon Mar 11 03:37:17 1996
To: submit-linux-dev-net@ratatosk.yggdrasil.com
From: hpa@freya.yggdrasil.com (H. Peter Anvin)
Date: 26 Feb 1996 17:45:18 GMT
Reply-To: hpa@storm.net (H. Peter Anvin)
Followup to: <Pine.3.89.9602251708.B19584-0100000@dal1820.computek.net=
>
By author: Ed Carp <erc@dal1820.computek.net>
In newsgroup: linux.dev.net
>=20
> If 50 ohm is what you want, might want to try Belden 9913 - the loss =
for=20
> 100 feet is just under 1.5 dB.
>=20
Ehm... Ed...
It will not help you to get a lower-loss coax. The coax length is
limited mainly by propagation delay and reflection issues, not loss.
The three coax standards for Ethernet are 10Base-2 (thinnet), 10Base-5
(thicknet) and 10Broad-36 (Ethernet over CATV). I wouldn't try to
invent your own unless you're prepared to fail and waste some
perfectly good coax, or you are willing to go and do all the
calculations from scratch (and still have a proprietary solution).
If you need longer distances than 10Base-5 permits (500 m, plus a 50
m AUI cable) you really should consider fiber; 10Base-F permits 2 km
runs and feeds off standard AUI ports. 10Base-F transceivers aren't
even that expensive.
-hpa
> Finger ecarp@netcom.com for PGP 2.5 public key
> an88744@anon.penet.fi=20
^^^^^^^^^^^^^^^^^^^^^
Hey, Ed, doesn't it sort of defeat the purpose to have your anon-id in
your sig file?
--=20
PGP public key available - finger hpa@terminus.storm.net
"The earth is but one country, and mankind its citizens." -- Bah=E1'u=
'll=E1h
I don't work for Yggdrasil, but they sponsor the linux.* hierarchy.
