Home / Standards / GB/T 21645.9-2012 GB/T 21645.9-2012 Active Technical requirements for automatically switched optical network (ASON) - Part 9: External network to network interface(E-NNI) 自动交换光网络(ASON)技术要求 第9部分:外部网络-网络接口(E-NNI) Standard Type GBT ICS 33.180.01 CCS M33 Status 现行 Issue Date 2012-12-31 Implementation 2013-06-01 Responsible Dept 工业和信息化部(通信) Drafting Unit N/A