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- Newsgroups: comp.protocols.tcp-ip.ibmpc
- Path: sparky!uunet!gatech!usenet.ins.cwru.edu!agate!ames!pacbell.com!att-out!cbnewsh!cbnewsh.cb.att.com!wcs
- From: wcs@anchor.ho.att.com (Bill Stewart +1-908-949-0705)
- Subject: Re: How to slow down Ethernet cards ?
- Organization: Brought to you by the numbers 2, 3, and 7
- Date: Tue, 12 Jan 1993 18:03:24 GMT
- Message-ID: <WCS.93Jan12130324@rainier.ATT.COM>
- In-Reply-To: luigi@iet.unipi.it's message of Tue, 29 Dec 1992 17:58:13 GMT
- References: <1992Dec29.175813.13563@cli.di.unipi.it>
- Sender: news@cbnewsh.cb.att.com (NetNews Administrator)
- Nntp-Posting-Host: rainier.ho.att.com
- Lines: 29
-
- In article <1992Dec29.175813.13563@cli.di.unipi.it> luigi@iet.unipi.it writes:
- to slow down an Ethernet controller in order to work at a slower speed,
- say something between 500 Kbit/s and 2Mbit/s. At least the 82586 I know
- .....
- [If you're curious why I'm asking this: it would make a cheap
- communication interface using medaia which cannot carry the full
- ethernet b/w. And it would be less time consuming for the PC than
-
- The old AT&T StarLAN 1 network ran CSMA/CD at 1 Mb/s, using twisted pair.
- Worked fine, and you got distances up to something like 1000m.
- It was slow, but it had some real advantages, like supporting
- daisy-chaining without hubs for small configurations.
- We all moved up to 10 Mb/s when it became affordable.
-
- That was in the old "We're the Phone Company. We're not compatible -
- we don't have to be" days, so it ran a variant on Datakit URP protocols
- instead of TCP/IP over top of it, (TCP was ported soon enough.)
- Had a nice direct interface into the Datakit wide-area-networks.
- This and the 3BNet (different framing over thick Ethernet)
- products encouraged the USG folks to avoid supporting TCP/IP until
- they'd missed their ability to make TCP/IP a standard part of the
- System V Release N environment, contributing to the non-winningness of
- that world for business. Nice stuff, though.
-
-
- --
- # Pray for peace; Bill
- # Bill Stewart 1-908-949-0705 wcs@anchor.att.com AT&T Bell Labs 4M312 Holmdel NJ
- Bush's pardon of his co-conspirators shows that he is, in the end, still a wimp.
-