What are the differences between the Motorola SB5100, SB5101 & SB5120?
Similar in appearance and features, the SB5101 & SB5120 are not repackaged versions of the SB5100. The SB5100 uses the Broadcom chipset/processor BCM3348. The SB5101 uses the Broadcom chipset/processor BCM3349. The SB5120 uses the Texas Instrument chipset/processor TI4401. Each modem has its own firmware versions unique to its model. All other product specifications are the same for all 3 models. The SB5100 has been discontinued by Motorola, but support is available. The SB5101 is a current model. The SB5120 is being phased out. You may also want to take a look at this post by Nerdtalker . ~sorto’ *This FAQ is based on user knowledge from a volunteer core of BroadbandReports’ members. This FAQ in no way constitutes official information from Comcast or any of its affiliates.