About MARCOS S
About E.S.E., Gif sur Yvette, FRA
About MACCHI O
About E.S.E., Gif sur Yvette, FRA
About Signal Processing
About data communication
About echo suppression
About Other transmission circuit elements
About Data communication
About データ伝送
About 適応
About エコー
About 消去
About 回線
About 等化