略語大辞典 [C] 26 PRI primary rate interface (日本のNTTのサービス総合ディジタル通信網ISDNの)一次群インタフェース.primary rate interface; or INS1500; or 23B+D; an ISDN(integrated services digital network) composed of 23 channels of 64kbps(B channel) and a D channel; a public communication service; ref. BRI(basic rate interfa 丸善「略語大辞典」JLogosID : 11856520