Motorola MB8600 DOCSIS 3.1 Cable Modem. Works perfectly - used with Gigabyte ethernet from Xfinity but recently switched to fiber. The item "Motorola MB8600 DOCSIS 3.1 Cable Modem" is in sale since Saturday, May 15, 2021. This item is in the category "Computers/Tablets & Networking\Home Networking & Connectivity\Modems". The seller is "mdougsellers" and is located in Barrington, Illinois.