China National Standards

China B ISDN user Industry Standards English PDF List

  •  China "B ISDN user" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    YD/T 976-1998 B-ISDN user-network interface physical layer specification
    b-isdn用户网络接口（uni）物理层规范    		 China Telecommunication Standards
    B ISDN user
    English PDF

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