2025-12-21 216.73.216.41
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Code of China
Chinese National Standard List: Digital communication equipment

GB/T 5581-1985 Specification and measuring method of frequency-modulated voice-frequency telegraph set for a modulation rate of 75 Bauds with channels spaced at 180 Hz 
  Issued on: 1985-01-01   Translation Price(USD): 260.0
GB/T 13994-1992 requirements for a 60 - Channel PCM/ADPCM transcoder equipment 
  Issued on: 1992-1-2   Translation Price(USD): 600.0
YD/T 989-1998 The Technical Requirement of Flexible Multiplexer 
  Issued on: 1998-12-30   Translation Price(USD): 640.0
YD/T 793-1996 Technical requirement and test method for 10-channel pulse code modulation multiplex equipment at 704kbit/s 
  Issued on: 1996-01-05   Translation Price(USD): 520.0
YD/T 974-1998 Specifications and Measurement Methods for SDH Digital Cross Connect Equipment(SDXC) 
  Issued on: 1998-5-20   Translation Price(USD): 1500.0
YD 336-1988 Digital Line Signalling for Manual Toll Exchange to local Exchange 
  Issued on: 1988-1-13   Translation Price(USD): 120.0
YD 284-1982 Technical specification of 2048 kbit/s regenerative repeater 
  Issued on:   Translation Price(USD): 240.0
YD/T 821-1996 Numerical Graphics of Measured Digital Transmission Performances 
  Issued on: 1996-3-12   Translation Price(USD): 180.0
YD/T 787-1995 Test Method of Time-Division Multiplexer at 64kbit/S 
  Issued on: 1995-12-18   Translation Price(USD): 90.0
YD/T 795-1996 Technical requirements and test methods of group multiplexing equipment (provide 384Kbit/s digital port) 
  Issued on: 1996-1-5   Translation Price(USD): 450.0
GB 6879-1986 Specifications of 30 channels pulse code modulation multiplex equipment at 2048 kbit/s 
  Issued on:   Translation Price(USD): 1304.0
YD/T 1070-2000 ZInterface requirement of access network remote equipment 
  Issued on: 2000-6-27   Translation Price(USD): 180.0
HB 6096-1986 SZ-01 Digital Information Transmission System 
  Issued on: 1986-10-25   Translation Price(USD): 1665.0
YD/T 1018-1999 Digital circuit multiplication equipment using ADPCM and DSI 
  Issued on: 1999-04-18   Translation Price(USD): 940.0
YD/T 748-1995 Limit Value for Maintenance of PDH Digital Channel Error Performances 
  Issued on: 1995-4-24   Translation Price(USD): 360.0
GB 3267-1982 The specification and test methods for conference telephone tandem board 
  Issued on: 1982-07-02   Translation Price(USD): 340.0
YD/T 743-1995 Technical conditions of symmetrical cable regenerative trunk equipment operating at 2048kbit/s 
  Issued on: 1995-04-02   Translation Price(USD): 160.0
YD/T 822-1996 P×64kbit/S Conference TV Encoded Mode 
  Issued on: 1996-3-12   Translation Price(USD): 300.0
YD/T 697-1993 Adaptive differential pulse code modulation at 32kbit/s 
  Issued on: 1994-03-26   Translation Price(USD): 490.0
YD/T 724-1994 Frame structure and multiplexing method for synchronous transport module STM-1, STM-4 
  Issued on: 1994-06-23   Translation Price(USD): 100.0
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