This is thin-thick-Ethernet in view mode; [Up]
Date: Sun 22-Dec-1988 18:08:22 From: Unknown Subject: Re: thin/thick Ethernet In article <12670010@eecs.nwu.edu> gore@eecs.nwu.edu (Jacob Gore) writes: >Just to make sure I understand you correctly: are you actually splicing >a piece of thin Ethernet into a thick Ethernet? Yes. It works. Loss per unit length is higher in the thin cable, but unless you are pushing the length limits of the Ethernet cable, adding a few feet of thin cable isn't that important. You might think that the transition would produce reflections, but my experience is that it doesn't. Find a TDR and check for yourself. If you have a farm of NeXT machines or other small machines with thin Ethernet connectors, it might be better to tie them all together on thin cable and only have one thick/thin transition. But this is not mandatory. Always check the machines at the ends of the cable for high retransmit rates. This is the first symptom of excessive losses, and indicates that collisions are being undetected due to cumulative loss in the cable. This means the cable is too long, or too lossy; time to get out a TDR or put a repeater in the middle. If your thick/thin mixed cable falls within the length limitations for thin Ethernets, everything should work fine. Only beyond that length should it be necessary to worry much about the electrical properties of the cabling. John Nagle >From: gore@eecs.nwu.edu (Jacob Gore)
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