Using CoLocation Connection At Branch Office

We have co-location space at a local San Diego data center with a 100mbps connection. We are looking for a faster internet connection at our office (currently just have DSL with is 1.5mbps down, 768kbps up) which is literally 2 miles away from the data center. I may be completely offbase and wrong here, but is there way we can setup a VPN connection or direct Point-to-Point connection between our office and our shared cabinet, and then utilize the internet connection and bandwidth provided by our shared cabinet for our office?

If this is possible, I would assume we would need special hardware, which is fine, just need details on how this works. Currently we have a SonicWall TZ180 at our shared cabinet and a Hotbrick SoHo 401W at the office.