GB/T 3380-1982
ActiveRinging and tone for telephone automatic switching network
电话自动交换网铃流和信号音
Application Summary AI generated
This standard specifies the technical requirements for ringing current and signaling tones used in telephone automatic switching networks. It is applied in the design, testing, and maintenance of telecommunication equipment and systems within China's public switched telephone network (PSTN), ensuring compatibility and consistent signaling between exchanges and terminal devices.
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