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電話光端機電源線和地線連接方法

電話光端機的電源線連接：設備標準機型電源配置為DC-48V或AC~220V，在設備接入電源之前，請先測量接入電源的電壓值及電源功率是否在設備的要求范圍之內：-48V電源： -48V±10%；AC220V電源：標準AC220V±20%，50Hz；在給設備引入電源之前請檢查設備的電源開關是否置于OFF，…

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