| Junji Yamada | Network Node Equipment Dept., Telecommunication Systems Div., |
| Koji Wakayama | Network Platform Research Dept., Central Research Lab., |
| Eisuke Sato | Access System Dept., Telecommunication Systems Div., |
To meet the demand for broadband access and enable a smooth transition from IPv4 (Internet protocol version 4) to IPv6 (Internet protocol version 6) networks, Hitachi has developed an optical Ethernet* converter of the AMN1100 series and broadband access gateway series.
The AMN1100 series Ethernet converter supports bi-directional communication via a single optical fiber by using wavelength division multiplexing technology. There are two models that transmit Ethernet frames via optical fiber. One is a PON (passive optical network) converter that shares a single fiber and center equipment with a maximum of 32 users by using an optical splitter installed between the center equipment and the user equipment. The other is an SS (single star) converter that connects center equipment and user equipment piece by piece. Hitachi's broadband access gateway series uses a network processor for packet processing and achieves high throughput performance. It is composed of two elements. One is an IPv4/IPv6 dual stack broadband access server, which accommodates various broadband access technologies such as CATV (cable TV), ADSL (asymmetric digital subscriber line), FTTH (fiber to the home), and so on.
Telecommunication carriers using Hitachi's broadband access server can provide a broadband access environment to users. The other element is an address translator, which enables a smooth transition from IPv4 to IPv6 networks.
| * | In some countries, 'ATO' is also called 'ATC (automatic train control).' |
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AG8000 Series (Japanese Only) |
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The Hitachi Hyoron (Japanese Only) |
BAS(broadband access server), IPv4/IPv6 (address) translator, SS(single star), PON(passive optical network)
