Standards
[GB] National Standards
[YD] Communication industry standards
[YDC] Communication standard technical documents for reference
[YDB] Communication Standard Technical Report
[YD] Communication industry standards

Communication industry standards£¨YD, YD/T and YDN£©£ºRegulatory documents issued and approved by the communications industry standardization authorities. The plan for standards developing is issued by the authority of communication standardization£¬while the draft standards are developed and examined by the CCSA, which are submitted to the industry authority for approval and issuance.

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NoDocument #TitlePublish DateStatus
3681 YD/T 566-1992 Technical Requirement and Test Method for Monitor's Desk in Manual Toll Telephone Switching Equipments 1988-04-13 Withdraw
3682 YD/T 567-1992 Technical Requirement and Test Method for Exchanger of Operating Service in Manual Toll Telephone Switching Equipments 1988-04-13 Withdraw
3683 YD/T 568-1992 Technical Requirements and Test Methods for Relay in Manual Toll Telephone Switching Equipments 1988-04-13 Withdraw
3684 YD/T 569-1992 Technical Requirements and Test Methods for Ringing Power Sources Alarm and Distribution Frame in Manual Toll Telephone Switching Equipments 1988-04-13 Withdraw
3685 YD/T 559-1992 Sealing Test for Pressarized Waveguide Componet and Assemblies 1987-03-16 In force
3686 YD/T 560-1992 The Wire Configurations on Poles of Open-wire for Toll Telecommunications 1987-03-16 Withdraw
3687 YD/T 557-1992 The "Xin-4" Transposition System for Open-wire Telecommunication Line 1985-09-29 Withdraw
3688 YD/T 558-1992 The "Xin-8" Transposition System for Open-wire Telecommunication Lines 1985-09-29 Withdraw
3689 YD/T 552-1992 Measuring method for the channel attenuation distortion in the communication network 1984-07-17 Withdraw
3690 YD/T 553-1992 Specification for Group Translating Equipment Used on Carrier Systems 1984-07-17 Withdraw
3691 YD/T 554-1992 Specification for Channel Translating Equipment Used on Carrier Systems 1984-07-17 Withdraw
3692 YD/T 551-1992 Document facsimile transmission(group1)in telephone network 1984-05-23 Withdraw
3693 YD/T 547-1992 Technical Requirement & Test Method for Conference Telephone Tandem Bord 1982-07-02 Withdraw
3694 YD/T 548-1992 Specification and Test Method for Conference Telephone Sets 1982-07-02 Withdraw


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