The Motorola SURFboard SB-5101 cable modem is a robust and versatile device designed to deliver high-speed broadband access over cable networks. Certified under DOCSIS 2.0 and Euro-DOCSIS 2.0 standards, it also retains full backward compatibility with DOCSIS 1.0 and 1.1, making it ideal for users whose networks are in transition between legacy and more modern systems.
It supports downstream data rates up to ≈ 38 Mbps under standard DOCSIS conditions, and up to ≈ 51 Mbps under Euro-DOCSIS, while upstream speeds can reach ≈ 30 Mbps, depending on service provider support. This ensures sufficient performance for everyday home or SOHO applications such as web browsing, email, VoIP, SD streaming, and online gaming.
Connectivity options include a 10/100Base-T Ethernet port (RJ-45) and in some variants (SB5101U/UE) an additional USB port, allowing compatibility with a broad range of user devices. LED indicators on the front panel provide easy monitoring of the modem’s status (Power, Receive, Send, Online, PC/Activity). Some units include a standby button that disconnects data services while keeping the modem powered, offering enhanced security and control.
Compact, lightweight, and environmentally compliant with RoHS standards, the SB-5101 is built for reliability. It supports advanced management protocols such as SNMP, TFTP, and online diagnostics, depending on ISP configuration, ensuring easy deployment and monitoring. Overall, this modem represents an affordable, reliable, and proven solution for basic broadband access.
Key Features & Benefits
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DOCSIS 2.0 / Euro-DOCSIS 2.0 certified with backward compatibility to DOCSIS 1.0 / 1.1.
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Downstream speeds up to 38 Mbps (51 Mbps Euro-DOCSIS) and upstream up to 30 Mbps.
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Dual connectivity: Ethernet 10/100Base-T port + USB (in SB5101U variants).
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Compact and durable design with LED indicators for real-time status.
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IPv6 support for next-generation internet addressing.
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RoHS compliant and energy efficient (~9 W power consumption).
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Compatible with Windows, Mac, Unix/Linux systems.
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Remote management via SNMP, TFTP, diagnostics (ISP dependent).
Technical Specifications
| Specification | Detail |
|---|---|
| Model / Part Number | Motorola SB-5101 |
| Standards | DOCSIS 2.0 / Euro-DOCSIS 2.0; backward compatible with DOCSIS 1.0 / 1.1 |
| Downstream Data Rate | ≈ 38 Mbps DOCSIS / ≈ 51 Mbps Euro-DOCSIS |
| Upstream Data Rate | ≈ 30 Mbps max |
| Interfaces | 10/100Base-T Ethernet (RJ-45); USB (SB5101U/UE only) |
| IPv6 Support | Yes |
| LED Indicators | Power, Receive, Send, Online, PC/Activity |
| Standby Switch | Yes, in some variants |
| Power Consumption | ≈ 9 W |
| Input Power | 100-240 VAC |
| Dimensions (HxWxD) | 6.2 × 2.3 × 6.0 in (15.75 × 5.84 × 15.24 cm) |
| Weight | ≈ 0.7 kg (1.5 lbs) |
| Compliance | RoHS; DOCSIS / Euro-DOCSIS; FCC |
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