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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 21645.9-2012 |
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) |
China National Standards Requirements external interface |
 English PDF |
| GB/T 15413-1994 |
Requirements of external interface for applied TV 应用电视外部接口要求 |
China National Standards Requirements external interface |
English PDF |
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