MRV Communications (MRVC) opinions? Message Board

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Technology Stocks : MRV Communications (MRVC) opinions?

MRVC 9.975

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Aug 15 5:00 PM EST

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To: Dan Spillane who wrote (3124)	4/29/1997 2:15:00 AM
From: Tio Rico	of 42804

If i understand correctly, the mechanism for increasing the effective distance of gigabit ethernet to 200M is a function of the minimum packet length and not the underlying medium (copper/silica fiber). Basically, if you take ethernet and scale it up by a factor of 100, what doesn't scale up is the speed at which the signal travels down the wire. Ethernet wants all nodes to detect every collision. If packets are allowed to be so short that they aren't "on every part of the wire" for some portion of their existence, then nodes far removed from each other (as measured by the intervening wire/fiber) may not detect the collision until after they have finished what they believe to be a "successful" transmission. i believe that MRVC submitted an amendment to the 802.3z committee which allowed short packets but only after an initial long packet, but my memory is hazy... You said: "If I remember correctly, MRVC had a copper-based "edge" on technology for increasing the effective distance to 200M over cat 5 UTP."

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