Fujitsu Corporation

Norihisa Uchimoto

Michio Kusayanagi

Akio Morimoto

Koji Tatsumi

Kazuhisa Shimazaki

Satoshi Namura

Koichiro Yamada

A first communication device receives an ATM cell bound for a second ATM device from a first ATM device via an ATM interface, and then the first communication device sends a data frame including the ATM cell to the second ATM device via wide area Ethernet. In addition, the first communication device sends a synchronization frame to the second ATM device via the wide area Ethernet continuously at a predetermined time interval in accordance with a clock frequency of the first ATM device. A second communication device receives the synchronization frame and measures a clock frequency of the first ATM device in accordance with a time interval of receiving the synchronization frame so as to reproduce a clock having the same frequency as the measured clock frequency. After that, the second communication device sends the clock to the second ATM device via an ATM interface.

Growing community of inventors

Kawasaki, Japan

Norihisa Uchimoto