Using multiple high speed connections with Asterisk

My company currently has two seperate DSL connections through the local telco. I would like to make use of both of these connections since a single DSL line can only support up to 4 VOIP calls with *. I was wondering if anyone had any suggestions as to how to best make use (read as seamless as possible) of multiple broadband connections with Asterisk. Thanks for your help…

Put a router on the front end that can bring in the traffic to asterisk as one pipe, and you can use g729 and get many more than 4 simul. calls.