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Optical forum finds support for 100-, 160Gb interfaces

Posted: 01 Aug 2005 ?? ?Print Version ?Bookmark and Share

Keywords:optical physical-layer interfaces?

The Optical Internetworking Forum (OIF) has collected input on possible standards for some of the first optical physical-layer interfaces to exceed 100Gbps.

At a meeting in Brussels, Belgium, OIF's physical-layer user group found the most interest in 100- and 160Gb standards. Some support for 80- and 120Gbps speeds emerged, though the 80Gb interface may be handled by an eight-channel multiplexed version of OIF's Common Electrical Interface.

Karl Gass of Sandia National Laboratories serves as both vice chairman of the OIF physical-layer working group and chairman of the newer physical-layer user group. That group supports institutions, carriers and enterprises who wanted greater say into the development efforts of component manufacturers and OEMs.

At OIF's next meeting in Fort Lauderdale, Fla., from Oct. 17-21, users will have another chance to talk to developers about high-speed rates. OIF is particularly looking for more input from the storage industry, though voting on specs at the meeting is limited to members only.

Gass said it is too early to tell if the higher-speed physical-layer standards will need additional interface specs on areas such as dispersion compensation and forward error-correction, which become critical to transceiver components at 40Gb and above. Before the list of interface requirements can be developed, members first must agree on the speeds and feature sets of high-speed data standards, Gass said.

In Brussels, the physical link layer working group began adding maintenance and diagnostic support details to the 10Gb CEI standard, and Gass said diagnostics and systems maintenance are so important at higher speeds that these areas will be added to standards discussions as soon as standards at 100Gb and above are defined.

The link-layer working group also has been working on electronic dispersion compensation-enabled 120km lengths as an adjunct to long-reach transponder standards at 10Gb. Similar work is likely for higher-speed physical standards.

- Loring Wirbel

EE Times

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