I cann't understand one thing about throughput ISR (1841/2851 series). Fast/Cef switching for this model 38.4 Mbps and 112.6 Mbps (correct me if It is not true), BUT, look there http://www.cisco.com/en/US/netsol/ns461/netbr09186a00801f0a72.html Maximum throughput for this models with AIM-modules are 45 Mbps and 160 Mbps. Why? What is a realy throughput for 2851 with AIM-module? And what is about other models?