This is the DSL router that came with my AT&T DSL subscription.  I recently moved and have no need for this since I switch to cable.  This would make a good backup, or use it as a wireless access point.  It has four ethernet ports on the back and does wireless.  Instructions can be found on the Internet for the model number 2701HG-B

  Comes with the router and the power supply.  The picture shown is a similar looking model, the one I have has the AT&T logo on it, that's the only difference.