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To: wonk who wrote (368)	5/5/1999 8:25:00 PM
From: Frank A. Coluccio	Respond to of 626

John, the same notion struck me at the time I first read the report/release. There's not enough to go on there, and I haven't had the focus or frame of mind to look into it until this time. However, earlier releases of the OPTera spoke about open DWDM, using many fewer wavelengths: Nortel Networks unveils its OPTera Portfolio for 'Always-on' Open Optical Networks Frankfurt / Hannover, 17. March 1999 - --Nortel Networks* [NYSE: NT/TSE: NTL] today introduced its OPTera* portfolio based on open Dense-Wavelength Division Multiplexing (D-WDM) for next-generation 'IP-over-light' optical communications in long-haul and metropolitan networks. Nortel Networks' OPTera enables end-to-end managed optical networking of native data protocols (IP, ATM, multi-media) and voice traffic with unprecedented reliability. I can't seem to find too much more at their web site, other than releases like these from the CeBit show. Maybe someone else can save us the time if they already know the principles being used in OPtera? Later, Frank Coluccio

To: wonk who wrote (368)	5/5/1999 10:21:00 PM
From: ahhaha	Read Replies (1) \| Respond to of 626

No. Nortal has pulled off a grand juggling act that may never materialize in the field. I wonder how pure the fiber has to be to accommodate that many colors and how much distance before repetition is necessary, so I don't know if they can juggle it. This has nothing to do with SR. Exact opposite. SR is trying to scale to tbps with one color by increasing the encoded bit density by spacetime refraction or spreading of the carrier to embed more data. Nortel is multiplying the data paths by loading many frequencies rather than loading frequencies in an amplitude. Can you get more data on a wave by changing it in the direction of travel or by changing it perpendicular to the direction of travel. SR thinks the latter way is the better way to travel.