Motorola B12 DOCSIS 3.1 Cable Modem | 2.5 Gbps Ethernet | Xfinity, Cox, Spectrum Approved

The Motorola B12 is a next-generation DOCSIS 3.1 cable modem built for households that need reliable multi-gigabit internet without paying monthly rental fees. It replaces the popular Motorola MB8611 with updated internals, 32 x 8 channel bonding, and a compact 3.5" x 3.5" x 5.5" footprint that fits just about anywhere.

Multi-Gig Performance With a 2.5 Gbps Ethernet Port

The B12 pairs DOCSIS 3.1 technology with a 2.5 Gbps Ethernet port, delivering true high-speed connectivity to compatible routers and computers. On supported internet plans, it can reach downstream speeds just below 2,500 Mbps and upstream speeds up to 800 Mbps. That makes it a strong match for gigabit and multi-gig cable plans from Xfinity, Cox, and Spectrum.

Built for Low Latency and Real-Time Applications

The Motorola B12 uses Active Queue Management (AQM) to reduce internet latency during high-traffic activity. This translates to smoother performance for online gaming, video conferencing, and 4K streaming, especially in homes where multiple devices are competing for bandwidth at the same time.

Approved for Major Cable ISPs

The B12 is approved for use with Comcast Xfinity, Cox, Spectrum, RCN, and Astound. It supports the fastest residential internet plans available from these providers. Before purchasing, verify that your specific plan and region are compatible by checking your ISP's approved modem list.

Replaces the Motorola MB8611

The B12 is Motorola's direct successor to the MB8611. It carries forward the same DOCSIS 3.1 and 32 x 8 channel bonding capabilities while adding improvements in a smaller form factor. If you currently use an MB8611 or are looking at it as an option, the B12 is the updated model to consider.

Specifications

• DOCSIS Version: 3.1
• Channel Bonding: 32 x 8
• Max Downstream Speed: Up to 2,500 Mbps
• Max Upstream Speed: Up to 800 Mbps
• Ethernet Port: 1x 2.5 Gbps
• Dimensions: 3.5" x 3.5" x 5.5"
• Compatible ISPs: Comcast Xfinity, Cox, Spectrum, RCN, Astound
• Warranty: 2 Years
• Support: US-based technical support via phone, chat, or email

Frequently Asked Questions

Does the Motorola B12 have a built-in WiFi router?

No. The B12 is a standalone cable modem. It needs to be paired with a separate WiFi router or mesh system to provide wireless internet coverage in your home.

Is the Motorola B12 compatible with my internet plan?

The B12 is approved for Comcast Xfinity, Cox, Spectrum, RCN, and Astound residential plans. Check your ISP's approved device list to confirm compatibility with your specific plan and region before purchasing.

What is the difference between the Motorola B12 and the MB8611?

The B12 is the direct replacement for the MB8611. Both are DOCSIS 3.1 modems with 32 x 8 channel bonding and a 2.5 Gbps Ethernet port, but the B12 features a more compact design and updated internals.

How much can I save by using the Motorola B12 instead of renting?

Most cable ISPs charge $14 or more per month for modem rentals. Owning the B12 can save you up to $168 per year, and the modem usually pays for itself within just a few months.

Does the Motorola B12 support multi-gig internet speeds?

Yes. With its DOCSIS 3.1 technology and 2.5 Gbps Ethernet port, the B12 supports downstream speeds up to 2,500 Mbps and upstream speeds up to 800 Mbps on compatible plans.

What is Active Queue Management on the Motorola B12?

Active Queue Management (AQM) is a feature that reduces latency by managing how data packets are queued during periods of heavy network traffic. It helps improve performance for latency-sensitive tasks like gaming, video calls, and streaming.

Does the Motorola B12 work with fiber or DSL internet?

No. The B12 is a cable modem designed for use with DOCSIS-based cable internet providers only. It is not compatible with fiber, DSL, or satellite internet services.