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To: Sector Investor who wrote (17331)12/7/1999 12:09:00 AM
From: Sector Investor  Respond to of 42804
 
Let's examine the article I posted earlier today on 2-tier optical networks of the future a bit more closely. CW's Aranea is a candidate for this type of core network.

"The purely photonic backbone of an optical Internet does not exist yet"

"When the service layer links directly to the transport layer, terabit routers will act as the integrating platform for multi-service network traffic, including leased line, voice, video, and data services. In other words, routers will be the first integral piece of the two-tiered network puzzle.

High-performance routers feature high bit rate optical interfaces (OC-48c and OC-192c), which obviates the need for high bit rate multiplexing traditionally performed by a SONET terminal."

"Transport systems that employ only 2.5 Gb/s DWDM channels are a dead-end solution. The baseline for next-generation photonic networks is 10 Gb/s, with 40 Gb/s on the near horizon. ."

"Finally, a two-tier network architecture offers bit rate transparency. A purely photonic networking system will be able to interface directly to any bit rate supported by the router at the wavelength level, whether OC-12c, OC-48c, OC-192c or beyond."

The CW Aranea fits this model very nicely. It handles up to 16 OC-192 ports, 32 OC-48 ports, 128 OC-12 ports, and offers multilink trunking up to OC-768 (40Gbps), aggregating 4 Aranea-1's at OC-192 into an OC-768 stream, via an Aranea-2 box (not announced yet) if desired. These are per-box numbers and the architecture expands to 32 boxes I believe. Also, up to 16 interfaces of any kind can be configured into a single DWDM link of up to 40Gbps. So the architecture ought to be good for several years ahead, as the state of the art has not yet moved to OC-192 (10Gbps).

The full article:

fiberopticsonline.com{6EB4B666-A1A5-11D3-9A73-00A0C9C83AFB}&Bucket=HomeFeaturedArticles