Untitled. PRC Resources: Using the Directory of Chinese National Standards. SAC maintains a database of all Chinese National GB Standards, which is searchable in English or Mandarin.
The database lists all mandatory and voluntary national standards, indicating voluntary standards with a “/T” prefix. For example, a voluntary national standard will have the prefix “GB/T”, while a mandatory national standard will show the prefix “GB”. The instructions below describe how to use the database to search for Chinese National GB Standards. Visit SAC’s database of Chinese National GB Standards.
Search for standards using any of the criteria shown above, including standard number, standard title, ICS code, date of issuance, or relevant technical committee. SRRC Type Approval-Radio Management of P.R China. Serial (RS232) port pinout and signals. Serial port interface pinout and signals Note: DCD can be sometimes labeled as CD Port Pins May Have No Constant Meaning Only 3 pins of the 9 have a fixed meaning: send, receive and signal ground.
This is defined by the hardware interface and you can't change it. Untitled Document. CISPR / H Branch - China Radio Management. 中华人民共和国工业和信息化部. PRC Frequency Allocation Table. Division provisions of the radio frequency of the People's Republic of China - China Radio Management.