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To: Matt Kroll who wrote (496)	8/21/1999 12:07:00 PM
From: Sector Investor	Read Replies (2) of 626

<<Note the distances specified.>> The Gigabit Ethernet equipment from MRVC (Nbase-Xyplex) already on the market uses their CWDM (Coarse WDM) technology and offers up to 8Gbps full duplex over 50KM distance. 8Gbps = 1 GBps (Gigabyte per second) or 5 minutes for a 300GB file. While not close to 8 seconds, the technology is low cost and off the shelf technology available to anyone. This from their website: "Course Wave Division Multiplexing (CWDM) Module. The GFS family offers a unique CWDM module that combines four Gigabit-Ethernet inputs from the switch fabric and multiplexes them onto a single fiber pair. By using multiple optical wavelengths on the same fiber, the CWDM4 module can operate in full duplex mode with a maximum aggregate data rate of 8 Gbps. Transmission distances can exceed 50 kilometers from point to point.The CWDM module of the GFS provides a low-cost alternative to Dense WDM for 0-50 km distances. CWDM uses uncooled DFB lasers that have a 20-nm separation between each wavelength."

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