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Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here -- Ignore unavailable to you. Want to Upgrade?

To: Frank A. Coluccio who wrote (1954)	8/24/1998 1:52:00 AM
From: Bernard Levy	Read Replies (1) \| Respond to of 12823

Hi Frank: It is to early to know for sure, but it appears that proper installation of the Cat5 pairs is very important to ensure the satisfactory operation of gigabit Ethernet over copper. The signal processing features of the new 1000BaseT standard are very sophisticated (adaptive filters are included to remove NEXT between all pairs, and trellis coding is used to accommodate the lower SNR tolerance of the 5-level PAM modulation format employed). I would say that the level of sophistication of 1000-BaseT transceivers ranks way up there with ADSL DMT transceivers. This is an impressive piece of engineering, but it pushes so far the state of the art that I expect lots of kinks when gigabit Ethernet over copper gets rolled out. For this reason, the rollout will probably be slow and painful (besides, most LANS have still not migrated to fast Ethernet, so that gigabit Ethernet speeds will not really be required for a while). Best regards, Bernard Levy