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- Path: kettle.magna.com.au!news
- From: mikb@magna.com.au (Mike Benson)
- Newsgroups: comp.sys.amiga.networking
- Subject: Re: Which Ethernet card to buy?
- Date: 7 Feb 1996 20:57:37 GMT
- Organization: MAGNADATA Internet Services
- Message-ID: <1841.6601T906T2780@magna.com.au>
- References: <4dgor9$t33@unidhp.uni-c.dk> <29083@lyssa.owl.de>
- <4dojt0$khu@unidhp.uni-c.dk> <29465@lyssa.owl.de> <4ducuk$srp@acmez.gatech.edu>
- NNTP-Posting-Host: mikb.magna.com.au
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP) *UNREGISTERED*
-
-
- In article n/a, gt1329a@prism.gatech.edu (David Ward) wrote:
- >In article <29465@lyssa.owl.de>, Matthias Scheler <tron@lyssa.owl.de> wrote:
- >->Rask Lambertsen wrote in comp.sys.amiga.networking about "Re: Which
- >->Ethernet card to buy?":
- >->> > T-base-2, T-base-T
- >->> ^^^^^^^^
- >->> Is that a typo?
- >->
- >->No.
- >->
- >->> I know that Ariadne supports T-base10.
- >->
- >->It doesn't. I have one and it has T-base-2 (BNC) and T-base-T (Twisted
- >Pair)
- >->but no T-base-10 (AUI).
- >->
-
- > Umm... That's all pretty confusing. 10 Base 2 is BNC (Also known as
- >cheapnet) and 10 Base T is twisted pair (RJ45). I've never seen their
- >designations reversed like that... Anyway, when he's saying that the
- >Ariadne has T-base10, I'm sure he must mean 10 Base T, which the Ariadne
- >does have (I'm using it right now).
-
- I don't think you can actually reverse the designation like that; not and
- make any sense! As a reminder, here's how to read the designations:
-
- BitrateCarrierMedium
-
- where
- "Bitrate" is the data transmission in Mbit/s. Normal ethernet is
- 10Mbit/s, but 100Mb/s variants exist.
- "Carrier" is the RF carrier used. Ethernet is baseband, ie "BASE".
- "Medium" is the type of medium used to carry the signal. Original
- ethernet is type 5, a heavy coax using a vampire tap that could
- use segments upto 500m. Thinnet (cheapernet, etc) is type 2,
- using RG-58 coax, BNC connectors, and segments up to 200m.
- Twisted pair is type T, using active hubs and a star configuration,
- so the segment length doesn't have the same meaning. A hyphen is
- usually used to separate "BASE" from the "T" (Otherwise, you have
- 10BASET, the breed of the dog which magically appears if you load
- your ethernet with too much traffic :-)
-
- In summary the common designations are:
- 10BASE5 - Thicknet
- 10BASE2 - Thinnet
- 10BASE-T - Twisted Pair
-
- Regards,
-
- Mike.
-
-