About OKUBO SHIGEKI
About NTTドコモ
About FURUKAWA MAKOTO
About NTTドコモ
About HAGIYA NORIAKI
About NTTドコモ
About NTT DOCOMOテクニカル・ジャーナル
About circuit exchanging
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About integrated communication network
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About 大容量
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About FOMA
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