RE: on topic this time :)

From: Chris Knipe (cgknipe@mweb.co.za)
Date: Fri Jan 07 2000 - 07:13:24 EST


On Thu, 6 Jan 2000, John LeMay wrote:

>What if I tried to use RG6 or RG59 (~72 ohm impedence as opposed to 50 ohm
>in RG8 and RG58) This makes little difference in the RF world. Is it
>different in the network world?

Apparently after just looking at the IEEE standard, and a little (well
actually rather big) book about networking, THINNET (by the IEEE standard)
supports the following...

Cable Media that is supported (Thinnet):

  Cable Impedance Description
  RG-58/U 50 Ohm Solid Copper Center
  RG-58 A/U 50 Ohm Wire Strand Center
  RG-58 C/U 50 Ohm Military Version Of RG-58 A/U
  RG-59 75 Ohm Cable TV Wire
  RG-62 93 Ohm ARCnet Specification

THINNET can also RELIABLY only transmit for 185 meters (about 610 feet).

Maximum of 30 attachments, which takes THINNET or THIKNET out of the
question (This includes any repeaters, or connections on the cable - even
an barrel connection counts as an attachment as far as my book here goes).

I think this is all the info I have at the moment about Thin and Thicknet
Ethernet standards (by IEEE). Hope it helps us all :)

*makes note to go download all IEEE standards*

Regards
Chris Knipe
Cel: (083) 430 8151
Freelance Internet Developer, Consultant, Administrator & Speaker

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