In this category you can find Diagnostic Cable Modems which were designed for the Docsis 3.0 standard such as the Diagnostic SB6120.. Docsis 3.0 is the next generation standard for cable networks in the US, and our high quality Docsis 3.0 Diagnostic Cable Modems are bleeding edge products compatible with this new standard. For those new to the hobby we recommend starting off with one of the Docsis 2.0 modems, as Docsis 3.0 modems are currently more challenging to work with. For those interested, Docsis 3.0 cable modems are backwards compatible with the Docsis 2.0 standard so if you want to upgrade for the future you may do so now.