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- Newsgroups: comp.protocols.tcp-ip
- Path: sparky!uunet!psinntp!cooper!hak
- From: hak@alf.cooper.edu (Jeff Hakner)
- Subject: Re: STARLAN 10 10BASE-T hub unit doesn't like adapters
- Message-ID: <1993Jan8.022641.27932@alf.cooper.edu>
- Organization: The Cooper Union ( NY, NY )
- References: <Jan.4.19.20.49.1993.958@ocean.rutgers.edu>
- Date: Fri, 8 Jan 1993 02:26:41 GMT
- Lines: 44
-
- in article <Jan.4.19.20.49.1993.958@ocean.rutgers.edu>, jimg@ocean.rutgers.edu (Jim Gasprich) says:
- >
- > I have two somewhat old (circa 1988) STARLAN 10 hub units that
- > are part of our TCP/IP ethernet LAN. Our lab is wired twisted pair
- > with RJ-45 plugs. This is fine for our PCs with their RJ-45 port
- > cards, but for our UNIX boxes (Suns), we need to use AUI to RJ-45
- > adapter boxes.
- >
- > Here's the problem. We recently bought a new (1991) adapter box from
- > Cabletron, but it did not work when we wired it up. We have a few
- > old adapters from AT&T (which came with our now defunct 3B2s (ick!)),
- > and some others from a company called David Systems, which work A-OK.
- >
- > I am somewhat perplexed. Has there been a change in the 802.3 standard,
- > are our hub units no longer usuable, or am I just missing something
- > somewhere ?? It would seem a shame to throw out 22 usuable ports,
- > especially with the price of some of the new fancy-pants hubs I've
- > been looking at.
- >
- > I apologize if these are newbie questions, or are more appropriate to
- > another, more wire-head hardware group.
- >
- > Thanks,
- >
- > Jim Gasprich e-mail: jimg@ocean.rutgers.edu
- > Research & Support Slave tel: (908) 932-9631
- > Cook College Remote Sensing Center fax: (908) 932-8644
- > Dept of Natural Resources
- > Rutgers University
- > New Brunswick, NJ, O8903 "Du bist mein Gweckman" - Anonymous Fascist
-
- I've had a similar problem. When I used the Allied Telesis thick-10BASE-T
- adapter and plucked the twisted pair into an AT&T STARLAN 10 hub, the
- whole network starting dying with heavy collisions (and no traffic!).
- WHen I replaced the hub with an Allied hub (more modern), no problems.
- I thought STARLAN10 was supposed to be compatible with 10-BASE-T, but perhaps
- there are some subtel differences which prevent this interoperation?
-
-
- --Jeff Hakner
- Asst. Dir. Telecommunications
- Cooper Union
- NYC
-
-