2025-12-23 216.73.216.41
Code of China Chinese Standard Classification Professional Classification ICS Classification Latest
Position: Search valid to be valid superseded to be superseded abolished to be abolished
Standard No. Title Price(USD) Delivery Status Add to Cart
GB/T 28524-2012 Media Gateway Control Protocol(MGCP) 1260.0 via email in 1~5 business day valid,,2012-10-1
GB 3971.2-1983 Interoffice junction digital line signalling system for telephone automatic switching network 150.0 via email in 1~3 business day valid,,1984-10-1
GB/T 28506-2012 Technical specification for national No.7 signalling system—GSM mobile telephone user part (MTUP) 990.0 via email in 1~3 business day valid,,2012-10-1
GB 3380-1982 Ringing and tone for telephone automatic switching network 90.0 via email in 1~3 business day valid,,1983-10-1
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GB/T 28524-2012 Media Gateway Control Protocol(MGCP) 
  Issued on: 2012-6-29   Price(USD): 1260.0
GB 3971.2-1983 Interoffice junction digital line signalling system for telephone automatic switching network 
  Issued on: 1983-12-15   Price(USD): 150.0
GB/T 28506-2012 Technical specification for national No.7 signalling system—GSM mobile telephone user part (MTUP) 
  Issued on: 2012-6-29   Price(USD): 990.0
GB 3380-1982 Ringing and tone for telephone automatic switching network 
  Issued on: 1982-12-29   Price(USD): 90.0
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