because they can not make enough profit off I , TW Cable start charge I $ 5 for rental of a modem they have give I for free for 6 year . it be a slight upgrade from the one I replace , although you can not really tell it from the performance . I plug it in , call TW to let they know -lrb- they have to do something in they office to get it recognize by the network -rrb- and I go right back to work on my computer .