略語大辞典 [C] 27 CLASS Custom Local Area Signaling Services; (アメリカのベル電話会社の)顧客向け地域通信サービス.Custom Local Area Signaling Services;a telecommunication network service;e.g. in IN(intelligent network), by Bell; a set of intelligent services for residential and small-business subscribers; e.g. call forwarding, call wait 丸善「略語大辞典」JLogosID : 11869597