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Need a DM300 that 1/ will actually work with Australian NBN FTTN. 2/has internal splitter for DSL and PSTN. 3/ has UNI-D for VoIP phone. 4/ UNI-V port?
What is a DM300? Doesn't seem to be something that Netgear makes.
You can check NBN and compatible devices here:
What is an NBN network and is my NETGEAR DSL modem router compatible? | Answer | NETGEAR Support