Why do you need 2 devices, which I presume are a modem & a router? Get your self a modem/router, like the Netgear DGN1000 or DGN3500, and save yourself all this trouble, After all you are only on ADSL Max.
My ISP is AOL (UK) which was supposedly taken over by talktalk and im on an old ADSL (G.DMT) line.
AOL Broadband, not AOL (UK), is owned by TT but manages their own BB.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC