ZyXEL's MEF certified Carrier Ethernet Switches and Extreme Networks BlackDiamond® 20800 Carrier Ethernet switch have been jointly tested for interoperability to ensure reliable network performance. This collaboration enables ZyXEL to provide our customers an high performance end-to-end Carrier Ethernet product portfolio. With the architectural flexibility and intelligent service delivery mechanisms, our service provider customers will be able to build a scalable and reliable service-driven metro network for maximum ROI.