IT181-OPC Operation manual Manual AT commands Configuration software "QuickSetup", version 2.9.39 (2021-02-15) Configuration software "CONNY", Version 3.5.50 (2022-06-28) IT181-OPC Operation manual Manual AT commands Configuration software "QuickSetup", version 2.9.39 (2021-02-15) Configuration software "CONNY", Version 3.5.50 (2022-06-28)