China National Standards

China DTMF Industry Standards English PDF List

  •  China "DTMF" Industry Standards English PDF List:
    • Standard  Code Standard Title Standard Class Order
    DL/T 888-2004 Electric power system dispatching exchange specification of DTMF signalling
    电力调度交换机电力DTMF信令规范    		 China Electricity & Power Standards
    DTMF
    English PDF

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