I have 4 ADSL line that i want to use with the 2911 ISR router. i guess i should have 4 HWIC ports for that. i've never configure ADSL connection so did someone have an idea about the configuration? is there anything than i should pay attention to it? Do i have to use an external modem with the router? i've looked on google, i found some links but i just want to have another opinions.