Fed up with the increase in Charter Cable modem rental , we `` go for break '' and purchase this unit . as with several previous review , it be amazing that you take out the old one , install the new one , and upon start-up the Charter software detect the new modem . the system ask for we account number and old modem MAC , then take it all from there . a 15 minute install . ca not speak for reliability -lrb- just install today -rrb- yet , but absolutely thrill at the ease of installation .