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Technology Stocks : Ascend Communications (ASND)

ASND 209.15

-1.5%

Nov 20 3:59 PM EST

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To: Dennis Doubleday who wrote (45937)	5/2/1998 8:12:00 PM
From: gbh	Read Replies (1) of 61433

It is. 40GB fully non-blocking in a 19-inch rack-mountable box. And it will do OC-48c. The "c" stands for "concatenated" which means that it will handle the full 2.5GB in a single VC, as opposed to the OC-48STM-16 provided by the GX-550, which allows only for 4 622MB VCs. Dennis, it is what? I understand it is 40Gb/s non-blocking. But, if the base configuration is 10Gb/s, as per the press release, this leads one to believe the only way to get to 40 is by serially connecting 4 of these together. The implication here is that there are really 4 discrete loosely coupled 10Gb/s switching matrix's, and so latency between them would not be nearly the same as a single full 40Gb/s switching matrix. I know that this is the way ASND can claim 100Gb/s with the 550. But its really just a 25Gb/s switch. I don't believe many customers actually use the 100Gb/s configuration (or FORE's 40Gb/s???) because of these latency issues. Please correct me if I'm wrong. Gary

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