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The wifi modem & FTTC network connection device both feel warm to touch. Are they supposed to be warm all the time? The were just set up 3 days ago. Also, the flashing light on the connection device is orange, not blue.
They get very warm to the touch. Make sure there is ventilation around both units. The NBN box could be raised a bit to improve air flow.
The light is orange because the wan port on the wifi router is 100Mbps instead of 1Gbps.