Hi,   NBN completed their part of the installation today but home phone (Telstra Call Guardian 301) inopperative and Wi-Fi not working either.  Modem is Tp-Link AX5400 supplied by TPG, NBN is FTTC. Cable connections look OK. The 4 blue LEDs on the NBN box are on. The following LEDs on the modem are on, Power, Internet, 2.4GHz, 5GHz, WAN.  Where do I go from here ?   Thanks ... View more