Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.
Incidentally, I was looking in my parametric database and it appears the OPA2670 is the only one in this family that is a coupled pair - also identified by the word "port" in the description.
There are much more recent dedicated xDSL drivers…