A quick google gave me some results on putting that modem into Bridge mode.
These are the instructions I used with my friend over the phone:
Do NOT accept a Telstra 2Wire 2701HGV-W - ADSL - BigPond - Whirlpool Broadband Forums
They don't mention it there, but make sure you restart the modem after that the steps listed, setup your account details in the PPPoE tab for the TC and roberts your fathers brother.
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