I recently replace my 10yr old Toshiba modem for a Linksys cm100 . the download speed be now about 30 % faster but only from those site closest to I here in Phoenix . I be also experience packet loss which appear as if the internet keep disconnect . I call COX about the issue and they say my Toshiba be to old to support and before they would review my circuit I need to buy a new modem . I learn while talk with a rep at cox , while give they the new MAC address and serial number , that they cable network now support doci 3.0 . this modem support doci 1.0 , 1.1 and 2.0 but not the newest 4 channel bonding standard . there be limited doci 3.0 compliant modem available but a internet search do find they for $ 85 + . this modem work just fine but in hindsight I would have pay the price difference for a modem that support the newer standard . the final comment be that it might not matter that much as regular testing of download speed on my work 's 45mb fiber connection find that access to server even a few state away be limit to 3-5mbs download .