I use previosly the modem model 5041 over 5 year already . there be issue with connection at first time , but it be solve when I call to my provider -lrb- Comcast by the way -rrb- . since then I never have any problem with this equipment . I would keep it till it die of the old age but on Dec 14 2009 Comcast upgrade its network so I have to pick new modem from they approve list of modem for 3 day before of marked day . I check review and pick the ZOOM 5241 . I have wireless router -lrb- linksy 54g -rrb- connect to my 5241 . what do I do for setup . 1 . Unplugged old modem from power , coaxial and router , 2 . plug new modem 5241 to he power adapter , coaxial cable and router -lrb- with rj45 connector -rrb- , 3 . Lunched Internet browser -lrb- firefox or ie -rrb- , 4 . I get Comcast page with instruction automatically -lrb- it would not let go for another until setup be do -rrb- , 5 . follow technician instruction -lrb- which not require any special skill -rrb- , 6 . enter my current account number and Comcast show I all my datum include physical and mac address . I do not plug in directly from modem to pc . at first Comcast do not pass linksy . I just ignore it and `` run diagnostic '' -lrb- which be just a button -rrb- again . everything be set up automatically . after too reboot I get perfect connection wire and wireless . download speed jump up dramatically . PS . one week later . zoom 5241 work now with renew Comcast network very good . however once I lose connection but because of the my LinkSys 54g wireless router . after I hit reset button on it I get all my connection back . so it be a linksys issue . right now zoom + Linksys work flawlessly . and I notice that download speed go up about 10 time faster -lrb- Limewire from 15-24 kb to 200-500 kb - 250 average -rrb- . well 5041 be useless for Comcast IP for today anyway but 5241 work perfect . I pick mine in Fry 's Electronics with describe above characteristic for $ 54 . good luck 2 year later . the Zoom modem still work without problem . however , LinkSys wireless transmission become unstable . it be possibly that it happen because of em interference . I switch 54g to Linksys e1500 . it work now so far so good . two month later . the Linksys e1500 router refuse to work . I have long conversation with Cisco , follow they instruction , and they agree that it be defective . so , I return it . ironically , the old router LinkSys 54G , which I try again , suddenly start to work without loose a signal . anyway , the modem be still on and never fail .