I buy this modem as a replacement for my comcast-rented DOCSIS 2.0 modem , and it work great when I connect my computer directly to the modem . when connect through my Apple Airport Extreme 802.11 n -lrb- 1st generation -rrb- router , though , I begin to see problem . Whenever I be do anything that use a substantial portion of my bandwidth -lrb- e.g. download large file or watch Netflix streaming -rrb- , after a couple of minute I would begin to see ping time to test server rise and eventually stop altogether . the connection would effectively drop for a minute or two , and then it would come back . my problem be very similar to the one report at -lrb- ... -rrb- I have use this router successfully with my prior cable modem , so there must be some incompatibility between the modem and my router . I also know other have report no problem with airport extreme router and this modem -lrb- though I do not know which generation of the airport Extreme they be use -rrb- .