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Technology Stocks : Ascend Communications (ASND)

ASND 209.76

-1.2%

2:55 PM EST

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To: Stimpson J. Cat who wrote (45909)	5/2/1998 9:29:00 AM
From: gbh	Read Replies (1) of 61433

Stimp, 100Gb/s in a single rack is quite a formidable product. But isn't it true that, proximity aside, the 100Gb/s is achieved by using 4 separate switch cards, each capapble of 25Gb/s, which are loosely coupled. Loosely coupled in the sense that the connection between them is serial (instead of the highly parallel connections of each of the switch cards) and likely 2.4Gb/s (trunk?). Hence, latency from one switch card to the next is quite a bit higher than if the in to out path exists on the same switch card. I think this is the same way Fore gets to 40Gb/s, by trunking 4 10Gb/s switches, also probably in the same rack. I'm not completely sure about Fore though. It may be a "true" 40Gb/s switch, but I don't think so. Gary

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