Motorola AC1900 Arris Modem Surfboard SBG6900AC Manual by Master May 26, 2020 written by Master Your Motorola AC1900 Arris Modem Surfboard SBG6900AC Manual is loading below, it can take up to 20 seconds for the *Loading…* icon to disappear (depending on your internet connection). You can also download the manual from the link below: