SURFboard® Cable Modem

The SB6121 delivers your complete personal media experience, at incredible broadband speeds. It harnesses the power of DOCSIS 3.0 technology to bond up to four downstream channels and four upstream channels— providing you advanced multimedia services with download speeds up to 172 Mbps in each direction. That makes surfing, shopping, and downloading far more realistic, faster, and efficient than ever before.

  • 4X Faster than DOCSIS 2.0
  • Download speeds up to 172 Mbps
  • DOCSIS 3.0 Cable Modem
  • 4 download and 4 upload channels
  • Supports IPv4 and IPv6 – the latest Internet standard
  • Compatible with major U.S. Cable Providers

Ethernet port (1)

1-port Gigabit Ethernet Router enables flexible, high-speed wired connectivity.


Coaxial connection

What’s COAX? A cable that is used in video, communications, and audio. This cable has high bandwidths and greater transmission capacity. Most users relate to a coaxial or coax cable as a cable used to connect their TVs to a cable TV service. However, these cables are also used in networks and what allow a broadband cable Internet connection using a cable modem