What type of load balancing are we talking about? Round Robin, Physical Layer Bonding (PHY), Inverse Multiplexing for ATM (IMA) or Multilink PPP (ML-PPP)? The first one can you carry out by yourself, but the other three must be implemented within your internet service provider’s access node (IMA) or access network (ML-PPP) and the customer located equipment, except from PHY wich is completely transparent, and only needs to be configured in the SHDSL transceiver. The first thing you should do is to ask your internet service provider what DSL Bonding technology they support. ML-PPP is the only technology that is possible to configure within zeroshell, but your ISP must also support it.