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Date: Sun 15-Nov-1988 18:09:46 From: Unknown Subject: Re: My ramblings on the NeXT machine In article <26812@ucbvax.BERKELEY.EDU> munson@renoir.Berkeley.EDU (Ethan V. Munson) writes: >3) Thin Ethernet -- NeXT has a Thin Ethernet connector. Here at Berkeley, > neither the EECS department or the academic computing service has > anything but thick ethernet. As of last week, even NeXT didn't > know where to find converters. Each converter will cost about > $200-300. Since these machines are targeted at professors, rather > than students, it may be hard to build short Thin Ethernets which > share one converter. Thick and thin Ethernet cable can simply be interconnected with coax adapters. Losses are higher in the thin sections, but the adapters themselves seem clean; I've looked at a mixed cable using a time-domain reflectometer, and I can see tranceivers and sharply bent cable, but not thick/thin adapters. Usually, you convert from thick to thin inside a wall, box, floor, or plenum, then bring two thin cables up to the machine, where they meet at a T connector attached to the back of the machine. Remember, the T connector must be directly on the back of the machine; any cable between the T and the computer causes reflections that trash data. If the entire cable is within the thin Ethernet length limit, everything should be safe. The appropriate adaptor is a constant-impedance UHF (female) to BNC (female) adapter. However, this is a hard-to-find adapter, and it may be necessary to combine a UHF (female) to BNC (male) adapter with a BNC-BNC barrel. Amphenol part 12025 is the adapter. John Nagle >From: jbn@glacier.STANFORD.EDU (John B. Nagle)
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Marcel Waldvogel and Netfuture.ch.