
But Cisco also has raised a bit of confusion. That's because the success of Cisco's Cerent box, now dubbed the ONS 15454, has been chiefly in network edge applications, not in the long-haul part of the net. The ONS 15454 was among the first products to aggregate OC48 links and feed them from carrier points of presence (POPs) to the network core.
It's also notable that Cisco's announcement this week didn't mention a number of other interesting points from RHK's report. For instance, RHK's figures show Nortel Networks Corp., the overall Sonet market leader, breathing down Cisco's neck in long-haul OC48. Just three points separate the two companies' slices of the OC48 pie.
What's more, RHK's report indicates that Cisco's not leading the most lucrative segment of the North American long-haul Sonet market. Sales of Sonet OC192 (10 Gbit/s) gear were $2.763 billion of an overall market of $5.03 billion in 2000 -- more than the $1.944 billion for OC48 (although more OC48 ports actually shipped). And RHK says that OC192 is the fastest-growing segment of the long-haul market.
What's more, Cisco's not on the map at all when it comes to sales of Sonet OC192 links, according to RHK. Instead, Nortel sales account for 95.1 percent of that market, with the rest of the pie divvied up among other players in tiny slivers.

Some analysts other than RHK say Cisco needn't worry too much about OC192 in the metro space -- where its OC48 presence is strongest. "OC192 isn't big in the access space," asserts Seth Spalding, director at Epoch Partners. He says some vendors, such as ONI Systems Inc. (Nasdaq: ONIS), offer OC192 as an access option, but he doesn't foresee it taking off there for at least a couple of years.
For its part, Nortel seems to view its leadership in long-haul Sonet OC192 links as a mixed blessing. That's because Nortel would rather publicize figures that show its role in next-generation products via sales of DWDM (dense wavelength-division multiplexing) gear. Ironically, Nortel gave a mixed message last week in announcing its market share in DWDM (see Nortel: Top Dog, but for How Long?) -- just as Cisco did with RHK's figures this week.
In both cases, attempts to pin down one aspect of the market served to emphasize a larger, more complex picture that wasn't initially discussed.
-- Mary Jander, senior editor, Light Reading http://www.lightreading.com
You're making the same mistake the Cisco press release makes - you are leaving out the Metro SONET market.
RHK released the SONET Metro Market Forecast & Analysis yesterday, and the information was not included in the Cisco press release. If you read the press release closely, RHK analysts are quoted about the Long-haul SONET market. Cisco (and you) are extrapolating this over the entire market.
Could you PLEASE read RHK's Metro report, calculate the REAL OC-48 market and then write the article?
Otherwise, you're doing a real dis-service to other OC-48 vendors (especially Fujitsu which has 43.9% share of the OC-48 metro SONET market).