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We recommend to check the support site of the TP-Link to confirm if the Archer D2 Ver. 1.0 AC 750 supports NBN connection.
I have an TP-Link Archer D2 Ver. 1.0 AC 750 Wireless Dual Band Gigabit ADSL2+ modem router. I think I bought it in 2016. Is it compatible with NBN? Thank you!