Hitachi, Ltd.

Atuko Kenmoku

Masaru Kokubo

Kazuo Okado

Yusuke Takeuchi

Keizo Yabuta

A sending data buffer for holding sending data temporarily and transmitting the data to an echo canceler section is installed between a sending section and an echo canceler section of an echo canceler integrated circuit included in a subscriber line circuit of an integrated service digital network. The sending data buffer is operated in a shift register mode during a sending training mode, and operated in FIFO (first in-first out) mode during a sending/receiving training mode. Also, an adjustment function of the delay amount corresponding to the use setting is added.

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Mitaka, Japan

Atuko Kenmoku