略語大辞典 [C] 20 BRA basic rate access (bus) (ディジタル通信ISDNでの)基本レート アクセス(バス).basic rate access (bus); or S0; in an ISDN(integrated service digital network); ref. PRA(primary rate access);[C:E]. 丸善「略語大辞典」JLogosID : 11867848