Tuesday, March 6, 2012

Vitesse and JDSU demo viability of SFP+ 10G transmission beyond 100km links for enterprise and metro markets

OFC/NFOEC 2012, LOS ANGELES, USA: Vitesse Semiconductor Corp. is pairing its quad channel VSC8248 Electronic Dispersion Compensation (EDC) and Clock and Data Recovery (CDR) device with SFP+ 10GBASE-ZR DWDM modules from JDSU, to demonstrate 10 Gbps DWDM links beyond 100 km – exceeding the 80-km standard for 10GBASE-ZR applications.

Linear modules, as opposed to limiting and retimed modules, require robust EDC capability on the host card in order to provide link margins required for the longer reaches beyond specifications in the 10GBASE-ZR applications. Part of Vitesse’s FlexEQ family of adaptive equalization technologies, Vitesse’s VSC8248 FFE/DFE EDC architecture delivers:

* Performance well in excess of the 80km ZR target resulting in additional system margin, link distance and/or improved OSNR/Chromatic Dispersion tolerance, and

* Support for multiple applications between 9.9 to 11.3 Gbps, including SONET/SDH, 10G Fibre Channel and 10G Ethernet.

All these benefits contribute to an increase in system network flexibility. JDSU’s initiative to support the ZR application in the form of compact SFP+ modules means that ZR links can be achieved with unprecedented front-panel port density and low power as well as minimal system cost.

“Achieving optical reaches of 80km and beyond has always been an ultimate goal for each module format. The combination of Vitesse’s EDC and JDSU’s SFP+ ZR enables longer optical links can be achieved economically and at the highest front panel density possible,” said Andrew Schmitt, directing analyst, optical at Infonetics. “This interoperability proof point should encourage wider deployment of SFP+ into DWDM applications.”

In addition to the newer ZR modules, Vitesse’s highly flexible VSC8248 quad EDC device can also serve as a host for SR, LR, ER, as well as passive copper attach applications in SFP+, QSFP, and CXP module formats, enabling the customer to design a single universal card that supports numerous applications.

“Our customers must balance the need for lower cost and power with maximum system flexibility and front-panel port density,” stated Richard Interrante, director of connectivity product marketing at Vitesse. “JDSU is a recognized leader in high performance long reach optical module design, particularly with the release of their latest SFP+ ZR modules. The combination of these modules with Vitesse’s field-proven EDC/CDR products gives our customers a highly robust, flexible, low cost solution for 80km links and beyond, extending our product leadership in these Enterprise and Metro market applications.”

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