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HFC NBN Configuration

We recently had an NBN technician install our NBN HFC Modem. Optus advised us to connect an ethernet cable from the modem to our Optus NBN Sagecom router. No luck and no connection to the internet.

We were advised to try a third-party router and have done so with the TP-Link ArcherA10. Also no luck. We've been told the service has been provisioned successfully and everything should be working. We've reset everything, manually configured PPPoE settings using our Optus Account username/password, Dynamic IP connection type, and now have connected our NBN modem directly to laptop via ethernet and STILL no internet connection.

Any advice? Optus has ordered a new router for us which seems counterproductive as there is no connection from the NBN modem itself. NBN are of no use, Optus can't solve our problem, and TP-Link tech support have been the most useful so far but say it's on the ISP to help from here.

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Re: HFC NBN Configuration


@jr4y wrote:

We recently had an NBN technician install our NBN HFC Modem.


Have Optus notified you, typically through SMS, that your NBN connective is active?


Optus advised us to connect an ethernet cable from the modem to our Optus NBN Sagecom router. 

This is correct. For HFC you connect the HFC modem to Sagemcom WAN port via a LAN cable.


We were advised to try a third-party router and have done so with the TP-Link ArcherA10.

This will only work after the Sagemcom makes the initial connection. Once that is done, you are free to use any router you like.


manually configured PPPoE settings using our Optus Account username/password

This is incorrect. The WAN connection type needs to be IPoE,Automatic IP, or DHCP. The HFC modem does the login, the router never needs a login for the internet connection (only yo access the router configurations).


now have connected our NBN modem directly to laptop via ethernet and STILL no internet connection.

With a direct connection the laptop just needs to use DHCP to connect to HFC box.


Optus has ordered a new router for us which seems counterproductive as there is no connection from the NBN modem itself.

They are surprisingly eager to send out routers mainly because their staff are just terrible at troubleshooting.

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