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| Hitachi Cable has been contributing to the adoption of Ethernet technology in carrier networks by pioneering advanced technologies and products such as GMXs (Gigabit Ethernet Multiplexers). Utilizing our accumulated expertise and technologies, Hitachi Cable has made significant advances in the achievement of a highly reliable Ethernet system, based around a secure method of system management called "Managed Ethernet." |
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| As part of these advances, we have developed the "Apresia®8000*9" series - 10-gigabit Ethernet switches on which EoE (Ethernet over Ethernet) technology has been implemented - an industry first that meets the needs of telecommunications carriers by providing them with the greater security and reliability needed for next-generation Ethernet WANs. EoE is a data-transmission technology that works in the Ethernet WAN edge switches of carriers, where user lines are accommodated, to help ensure reliable network operation. At one edge, frames from the user network are encapsulated, attached with an EoE header, and directed over the Ethernet WAN in accordance with the information in the header. At the other edge, the EoE header is detached, and, after being decapsulated, these frames enter the user network again. In addition to the ability to significantly reduce the number of MAC addresses the core switch needs to learn, EoE provides infinite loop prevention and route analysis, allowing for the creation of a more stable Ethernet WAN (Figure 2). Moreover, EoE allows systems to be built at a fraction of the cost of those utilizing a similarly featured international standard, EoMPLS (Ethernet over Multi-Protocol Label Switching). |
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| In the future, it will be possible to provide advanced broadband services by interconnecting the Internet with 3rd- or 4th-generation mobile-phone networks. |
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| There have been further advances in the "oWAVE/eWAVE" series, Hitachi Cable's next-generation GMXs, since its release in 2003. In addition to existing features such as the all-optical network structure, which uses Digital Wrappers to enable long-distance transmission and greater reliability, this next-generation oWAVE/eWAVE series enables multi-protocol transmission, including SONET, and even longer-distance multiplexing (1,000 km for 8 wavelengths; 400 km for 16 wavelengths). The oWAVE/eWAVE series is highly valued as an innovative solution that aids in the creation of high-quality, low-cost backbones in areas with MAN/RAN. |
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Apresia®8007 |
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