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YDN 030.1-1997 Implications and Process of Universal Personal Telecommunication, Wide Area Centrex Switch (WAC), Vote of Telephone (VOT) and Mass Calling (MAS) Services 
  Issued on: 1997-4-1   Price(USD): 630.0
YDN 077-1997 Technical System of China Public Multimedia Communications Network  
  Issued on: 1998-2-1   Price(USD): 600.0
YD 234-1981 Single-eye ground splint 
  Issued on:   Price(USD): 180.0
YDN 066-1997 Technical Specification for No.7 Signaling Mode Operation, Maintenance and Administration Part (OMAP) (Temporary Regulations) 
  Issued on: 1998-2-18   Price(USD): 1050.0
YDN 030.2-1997 Code Number and Dialing Procedure of Universal Personal Telecommunication, Wide Area Centrex Switch (WAC), Vote of Telephone (VOT) and Mass Calling (MAS) Services 
  Issued on: 1997-4-1   Price(USD): 234.0
YDN 061-1997 Technical System of Access Network (Tentative Specifications) 
  Issued on: 1997-1-1   Price(USD): 1170.0
YDN 034.2-1997 ISDN Subscribers - Specification for Network Interfaces Part 2: Technical Specifications for Data Link Layers 
  Issued on: 1997-2-18   Price(USD): 1470.0
YDN 088-1998 Technical System of Auto Exchange Telephone (Digital) Network 
  Issued on: 1998-4-1   Price(USD): 900.0
YD/T 959-1998 Management Functions of Telecommunication Management Network (TMN) 
  Issued on: 1998-8-7   Price(USD): 510.0
QB 1727-1993 Monochrome Photographic Paper 
  Issued on: 1993-4-15   Price(USD): 120.0
YD/T 521-1992 Test Method of Digital Exchange Analog Interfaces and Test Method of Transmission Characteristics Between (2-Wire Or 4-Wire) Analog Interfaces 
  Issued on: 1992-1-25   Price(USD): 330.0
YD/T 512-1992 Technical Conditions for Telegraph Power Supply Unit 
  Issued on: 1992-1-19   Price(USD): 150.0
YD/T 534-1992 PVC Insulated, PVC Sheathed, LF Communication Cables and Wires Solid- Or Stranded-Conductor, PVC Insulated Equipment Wires 
  Issued on: 1992-4-25   Price(USD): 240.0
YD/T 587-1992 Test Method for Technical Parameters for Networking of Telegraph Terminal Equipment 
  Issued on: 1992-7-21   Price(USD): 150.0
YD 586-1992 Requirement for Networking of Chinese-character Terminal Equipments for Public Telegraphy 
  Issued on: 1992-7-21   Price(USD): 140.0
YD/T 539-1992 Fundamental Parameters of Synchronous Data Multiplexing Scheme Without Envelope Structure 
  Issued on: 1992-5-29   Price(USD): 100.0
YD/T 634-1993 IF Modem Equipment Operating at 8Mbit/S 
  Issued on: 1993-8-17   Price(USD): 210.0
YD/T 638.14-1993 Type Designation System for Telephone Sets 
  Issued on: 1993-8-17   Price(USD): 104.0
YD/T 635-1993 Inspection and Test Methods of Telegraph Terminal Equipment 
  Issued on: 1993-8-17   Price(USD): 150.0
YD/T 633-1993 IF Modem Equipment Operating at 34Mbit/S 
  Issued on: 1993-8-17   Price(USD): 240.0
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