I am confused as to the methods available to implement Dial Backup on an 1811 ISR.
My router's WAN is connected to a cable modem via FA0.
In reading the 1811 software configuration guide (chapter 13, page 13-5), I have viewed a table listing "Dial Backup Feature Limitations".
I do not know how to interpret this table.
Is it telling me that Dial Backup on an 1811 is not possible using my "Normal IP cable modem senario"?
Any insight into this issue is gratefully appreciated.