Need a router recommendation to handle the performance of a 6mb pipe. Can four T-1's be bonded together to acomplish this? Will a 2811 suffice?

Can someone confirm the following setup is correct?An E1 circuit has been provided by the carrier to a remote site in the UK terminated on a "NTE52D", then connected to a Metrodata DC3000 X.121 DSU. The DC3000 is cabled to a WIC-1T on the router wit...