標準號：DIN ETS 300137-1992
中文標準名稱：綜合服務數字網絡(ISDN).封閉式用戶組的附加服務.功能能力和信息流量
英文標準名稱：Integrated Services Digital Network (ISDN); Closed User Group (CUG) supplementary service; functional capabilities and information flows; english version ETS 300137:1992
標準類型：L78
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：L78
國際標準分類號：33.080
適用范圍：This document deals with the stage 2 description of the Closed User Group supplementary service in the pan-European ISDN. This supplementary service enables users to form groups, to and from which access is restricted. Members of a specific closed user group can communicate among each other but not, in general, with users outside the group.#,,#