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25 January 2012


Operators prefer to deploy 100Gbps technology as they upgrade their networks. That is a main finding of a study by market research firm, Infonetics Research.
Operators prefer 100Gbps transport for both Brownfield and Greenfield installations. Carriers favour 100Gbps for new, Greenfield builds, and will use 40 and 100Gbps to the same degree in existing Brownfield networks.
"It is more an issue that they [carriers] are building with 40Gbps now but will transition to 100Gbps where it can be used," said Andrew Schmitt, directing analyst for optical at Infonetics Research. "Where it can't be used they stick with 40Gbps."
The study also found that non-coherent 100Gbps is not yet viewed as an important technology. Partly this is because the technology is still new and operators have yet to assess its merits.
As for optical switching, colourless and directionless ROADMs and Optical Transport Network (OTN) switching are seen by the operators as important components of Greenfield builds. However gridless and contentionless ROADMs are much less so. 
"The gridless requirement is completely overblown and folks positioning it as a requirement today haven't done the work to understand the issues trying to use it today," said Schmitt. "This survey was even more negative than I expected."
Infonetics interviewed 21 operators for the study: incumbent service providers, competitive operators and mobile operators. The operators either have 40Gbps, 100Gbps or both wavelength types installed in their networks, or plan to install by 2013.  The operators, from all the major regions, account for 28% of worldwide telecom carrier revenue and capital expenditure.
By Roy Rubenstein