KS C IEC 60839-5-3-2021 Alarm and electronic security systems ―Part 5-3: Alarm transmission systems ― Requirements for receiving centre transceiver(RCT)
2021KS C IEC 60839-5-3-2021 Alarm and electronic security systems ―Part 5-3: Alarm transmission systems ― Requirements for receiving centre transceiver(RCT)