| Noboru Endo | Research and Development Group, |
| Morihito Miyagi | Research and Development Group, |
| Tatsuo Kanetake | Research and Development Div., |
| Akihiko Takase | Telecommunications and Information Infrastructure Group, |
As more and more services become available on the Internet, carrier IP networks are becoming more of a social infrastructure. They and their nodes must thus support higher speeds, larger capacities, and higher reliability. In this paper we describe Hitachi's carrier IP network systems and how they fulfill these requirements. For backbone IP networks Hitachi provides a large-capacity, multi-functional IP node, the GR2000, and is developing a next-generation tera-bit-class IP node architecture. For backbone and metropolitan optical networks, Hitachi provides SONET/SDH and DWDM transmission systems. Furthermore, a transparent transponder multiplexer system has been developed to facilitate adaptation of legacy low-speed traffic to high-speed networks. For access networks, Hitachi is developing a scalable, multi-layer switching access node architecture. For service and operation support, Hitachi has proposed a novel active network technology for providing new services. Additionally, an operations support system is available for flexibly introducing services and reducing operation costs.
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Information & Telecommunication Systems |
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Telecomunication & Network Systems |
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The Hitachi Hyoron (Japanese Only) |
carrier network infrastructure, network solution, network integration, IP network, optical network
