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PHY device enables Ethernet to OTN convergence

Posted: 01 Feb 2008     Print Version  Bookmark and Share

Keywords:PHY device  Metro Ethernet  optical transport network 

Pemaquid S19258

Applied Micro Circuits Corp. (AMCC) has introduced the Pemaquid, a XAUI-to-XFI 10G LAN/WAN/OTN Framer/Mapper/PHY device for 10GbE, 10G Fibre Channel and OTU2 network applications.

The Pemaquid S19258 is the company's first device in its Metro Ethernet optical networks product family that is designed for Metro Ethernet and Carrier Grade Ethernet solutions systems. Pemaquid enables cost effective Carrier Ethernet solutions for the Metro WDM Transport Network.

Carrier service providers' desire to migrate from traditional SONET/SDH transmission equipment to Carrier-Grade Ethernet equipment and 10GbE/OTN services requires new cost effective silicon. Pemaquid is the claimed to be the first PHY device that enables Ethernet to optical networks (OTN) convergence. Prior to the availability of, Pemaquid service providers had to back-end carrier Ethernet and switch router platforms with DWDM equipment to enter/exit OTNs.

Pemaquid features integrated 10GbE to OTU2 mapping modes, EDC, FEC, and XAUI and serial 10G Interfaces. The devices enable the direct connection between 10G MACs, network processors, or 10GbE switches, and XFP/SFP+ optical modules. A single Pemaquid can take the place of up to three devices, an FEC/Framer/Mapper device, an SFI4.1 to Serial 10G PHY device, and a bridge device to connect the 10G MAC to the FEC/FRAMER/Mapper.

Cost, space, power savings
The Pemaquid is suitable for Metro Ethernet switch/router and DWDM systems. The highly integrated device supports pure 10GbE LAN Metro-Ethernet networks, as well as WAN and OTN networks via its rich suite of 10GbE over WAN and OTN mapping modes. With its integrated serial 10G PHY XFI/SFI interface and provisional G.709

In addition, GFEC/EFEC feature provides a seamless interface to XFP and SFP+ optical modules. It is designed for carrier-grade Metro Ethernet switch/router cards, OTU2 DWDM client tributary and line cards, and 10GbE/OC-192 multi-service provisioning platform client tributary and line cards.

By leveraging the 10G mapper/OTN/FEC functionality from AMCC's Rubicon product family and integrating 10G PHY and XAUI interfaces from the QT2x25 PHY product line, the company has created an integrated solution that saves cost, power and space. With its integrated FRACn synthesizer, only one low cost external reference oscillator is required to enable Pemaquid to support 10G line rates from 9.954Gbit/s up to 11.32Gbit/s, while meeting SONET/SDH and OTN jitter requirements.

In addition to this timing flexibility, the Pemaquid device supports seven 10GbE mapping modes, including bit transparent mapping; GFP mapping, WIS framing; and 10GbE LAN pass-thru modes.

Also, with integrated ITU G.709 FEC, and AMCC's enhanced FEC (ITU G.975.1.I4), Pemaquid enables Metro and Long Haul transmission of 10GbE over OTN networks in low OSNR environments. The GFEC and enhanced FEC also compensates for nonlinear inter-channel impairments, which allows for a narrow channel spacing of 25GHz for DWDM systems.

"In addressing the emerging Metro-Ethernet network, there is a desire to leverage as many aspects of the low-cost enterprise Ethernet infrastructure as possible," said Neal Neslusan, director of transport marketing at AMCC. "AMCC's technology portfolio enabled us to rapidly deliver this highly integrated leadership product to market. We are seeing an incredible traction in the marketplace for this device with its rich feature set, and several customer platforms are already in advanced design phases."

Pemaquid is available in a 19-by-19mm package and consumes 2.5W under typical applications. The S19258 is sampling with general availability scheduled for March.

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