Welcome to the Community!
I was unable to pull up an account using your community details so I'm not certain as to the type of technology used for your NBN service.
That being said, since you were provided a Huawei HG659, most likely you're on a service technology that requires a VDSL2 modem. Nonetheless, please PM us your customer ID or username so we can specifically identify the kind of setup required for your connection. Or you may also comment the service technology you're on.
For your reference: How do I private message (PM) in the community
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