Motorola SB6121 SURFboard Specs and Reviews

Many people want data and multimedia services with high bandwidth. Our extreme cable modem user-friendly, Motorola SB6121 SURFboard allows you to deliver. Taking advantage of the power of DOCSIS 3.0, the SB6121 allows up to 4 channels downstream and upstream, able to offer their customers advanced multimedia services with data rates of over 100 Mbps in each direction.

Motorola SB6121 SURFboard Specs

sb6121 specs


  • Device Type:  Cable modem
  • Enclosure Type:  External
  • Width:  1.7 in
  • Depth:  5.2 in
  • Height:  5.2 in


  • Interface Type:  Gigabit Ethernet
  • Connectivity Technology:  Wired
  • Max Transfer Rate:  195 Mbps
  • Protocols & Specifications:  DOCSIS 3.0, Euro-DOCSIS 3.0
  • Multiplexed Channels Qty:  4
  • Line Coding Format:  8 QAM, 32 QAM, 128 QAM, 64 QAM, 256 QAM, QPSK, 16 QAM


  • Type:  Network adapter
  • Connectivity Technology:  Wired
  • Data Link Protocol:  Ethernet, Fast Ethernet, Gigabit Ethernet
  • Data Transfer Rate:  1 Gbps
  • Network / Transport Protocol:  TCP/IP
  • Remote Management Protocol:  SNMP, HTTP
  • Features:  Auto-negotiation, auto-uplink (auto MDI/MDI-X), IPv6 support, IPv4 support

Software / System Requirements:

  • OS Required:  UNIX, Linux, Apple MacOS 9.0 or later, Microsoft Windows 2000/XP/Vista/7
  • System Requirements Details:  Pentium ¦ PowerPC

Motorola SB6121 SURFboard Reviews

This is some customer reviews on the internet:
Works with Comcast XFinity: to work with Comcast to XFinity. Easy to set up. Performance is great. DOCSIS 3.0 version

Quality product-price: new Xfinity internet client. Easy and fast installation, solid performance. Best way to pay 7.00 per month lease!

Modem Surfboard: this modem was easy to install, then I put my ISP to add this device to my account. I have noticed an increase in my old internet speed surfboard modem. I would suggest this for each modem rental or through a device.

Bought to Xfinity: it worked great right out of the box. Fast shipping.

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