DIN ETS 300300-1998 宽带综合服务数字网(B-ISDN).基于用户网络访问的同步数字层次结构.155520 kbit/s和622080 kbit/s的ATM异步传输模式(ATM) B-ISDN应用的物理层用户接口
Broadband Integrated Services Digital Network (B-ISDN) - Synchronous Digital Hierarchy (SDH) based user network access - Physical Layer User Network Interface (UNI) for 155520 kbit/s and 622080 kbit/s Asynchronous Transfer Mode (ATM) B-ISDN applications;
The document defines the synchronous digital hierachy based user network access physical layer interfaces to be applied to the TB and SB reference points of the reference configurations of the broadband-ISDN.