ACCESS@ALCANKTN.BITNET (Shawn Allin - Alcan KRDC Computer Services) (12/21/89)
Hello all (again),
We have a couple of Personal Irises and one 4D-120 GTX at the moment.
All of them are hooked into ethernet by thick wire transceiver cables into
DEC Delni boxes. Is there any way instead to use thin wire ethernet, say
with a DESTA? One of our labs tried this with an Iris 3130 a couple of
years ago without success. Any comments would be appreciated.
Cheers,
Shawn Allin
Alcan International Ltd.,
P.O. Box 8400,
Kingston, Ont.,
Canada K7L 5L9
(613) 541-2178
Bitnet: ACCESS@ALCANKTN
Soon to be: ACCESS@KRDC.INT.Alcan.CAjweldon@renegade.sgi.com (Jack Weldon) (12/23/89)
In article <06A067F6DFDF203282@ALCANKTN.BITNET> ACCESS@ALCANKTN.BITNET (Shawn Allin - Alcan KRDC Computer Services) writes: > > We have a couple of Personal Irises and one 4D-120 GTX at the moment. > All of them are hooked into ethernet by thick wire transceiver cables into > DEC Delni boxes. Is there any way instead to use thin wire ethernet, say > with a DESTA? One of our labs tried this with an Iris 3130 a couple of > years ago without success. Any comments would be appreciated. > > Shawn Allin > Alcan International Ltd., There should be no reason why you can't use thinnet coax for your 3000 or your 4D. The only difference is in the thickness of the coax, and therefore the overall length of the cable, end-to-end. Since SGI sells the Cabletron ST-500 Transceiver as either a thin or thick connection, so there should be no problem using your DESTA xcvr. I have assisted customers with this many times in the past, so I can't really see what the problem might be. Verify that SQE is set off (for the 3000s and the PI), and check termination from one end of the coax--should read ~50 ohms. Try swapping a "known-good" thinnet xcvr into its place, or maybe moving the IRIS and attaching it to a "known-good" thinnet. Best of luck. Jack Weldon System Engineer--Communications Group SGI Product Support
goss@SNOW-WHITE.MERIT-TECH.COM (Mike Goss) (12/29/89)
It is possible to hook an IRIS (or any machine with a standard Ethernet drop cable) to thin wire Ethernet. Since the IRIS does not have a built-in Ethernet tranceiver, you need a transceiver with a thin-wire interface. You would need to purchase a transceiver for each machine, so this might be more expensive than just using a DELNI or similar piece of equipment. We have a installed a Personal Iris on thin-wire using this approach, and have had no problems. The tranceiver we used is a "CentreCOM 100 Series" made by Allied Telesis. I suspect that there are probably many others available that would work just as well. ------------------------------ Mike Goss Merit Technology Inc. (214)733-7018 goss@snow-white.merit-tech.com