Allocates traffic across multiple internet providers

Helps you maximizes bandwidth

Improves network performance

Supports up to 7 independent WANs with QoS enabled (over 200 with QoS disabled)

Includes WAN Failover for maximum uptime at no additional cost

Notes:

Each WAN connection will require its own separate network card in the server

Each Internet connection must be in separate IP address space

If present, PPPoE must be handled by the upstream DSL modem

Your maximum available bandwith will be improved as there will be more to go around, however the maximum speed will still be that of the particular ISP used for each connection

WAN Balancer allows companies to easily split traffic across multiple WAN links. The traffic is spread based on user-specified weightings, ensuring less contention and higher performance. Companies can opt to save money with WAN Balancer by eliminating an expensive T1 connection in favor of multiple redundant Cable and DSL links; these connections are dynamically used when up or down because of our inclusion of WAN Failover when purchasing WAN Balancer.

Untangle Forums: WAN Balancer
Untangle Wiki: WAN Balancer