I have four small remote offices using Dreytek 2700s with a standard ADSL each. Another one of my sites uses a 3300 with 3xADSLs for load balancing. These all VPN into my head office currently using an expensive leased line. Is it possible to VPN each of these remote sites into head office using a dedicated ADSL at each end?

In this scenario there would be 7 ADSLs at the head office (still cheaper than leased line) but this would mean 7 routers on the same network - is this possible? Can I configure each of these dedicated ADSLs at head office to tie into a common Drytek router?

Any help would be really appreciated. Thanks.