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RCA DCM425 Digital Cable Modem — main product image
RCA

RCA DCM425 Digital Cable Modem

★★★★★4.0 (335 reviews)

A DOCSIS 2.0 cable modem with dual USB and Ethernet connectivity for basic broadband internet access.

$27.95*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The RCA DCM425 Digital Cable Modem is a DOCSIS 2.0 certified device designed to provide a reliable connection to cable internet service. It offers connectivity through both a USB port and an Ethernet port, bridging between the two so users can choose the interface that best suits their setup. With support for 16 upstream flows, it was built to accommodate tiered data services and included traffic prioritization schemes for managing bandwidth across different types of network activity. Integrated Broadcom Propane technology was designed to enable efficient handling of multiple users on a cable segment.

As a legacy product, the DCM425 is best understood in the context of its era. DOCSIS 2.0 offers a theoretical maximum downstream speed of approximately 42 Mbps, which falls far short of the capabilities of modern DOCSIS 3.0 and 3.1 modems. Most current cable internet providers have phased out support for DOCSIS 2.0 equipment, so prospective buyers should verify compatibility with their ISP before considering this modem. It remains a functional piece of networking hardware for niche or legacy applications but is not suitable for modern broadband speeds or services.

Key Features

Certified for DOCSIS 1.0, 1.1, 2.0

Bridges between a USB & Ethernet port

16 upstream flows allow tiered data services & support more efficient telephony

Traffic prioritization schemes

Integrated Broadcom Propane™ technology enables connection of more Internet users

Specifications

Brand
RCA
Model
DCM425
Type
Digital Cable Modem
DOCSIS Certification
1.0, 1.1, 2.0
Ports
USB, Ethernet
Upstream Flows
16
Technology
Integrated Broadcom Propane

Pros & Cons

👍 Pros

  • Dual connectivity options with both USB and Ethernet ports give flexibility in how you connect your computer.
  • Supports 16 upstream flows for traffic prioritization, which can benefit tiered service plans.
  • Simple plug-and-play setup without complex configuration for basic cable internet connections.
  • Compact, standalone modem design takes up minimal space.

👎 Cons

  • Limited to DOCSIS 2.0, which is largely unsupported by modern cable providers and offers significantly slower speeds than DOCSIS 3.0 or 3.1.
  • No built-in Wi-Fi or router functionality — a separate router is required for wireless or multi-device use.
  • Maximum throughput is far below what current broadband plans offer, making it a bottleneck on faster connections.
  • This is a legacy product with no ongoing firmware updates or manufacturer support.

Frequently Asked Questions

It is certified for DOCSIS 1.0, 1.1, and 2.0, which are older standards. It does not support DOCSIS 3.0 or 3.1.
It bridges between a USB and an Ethernet port, allowing connection through either interface depending on your setup.
Most current cable providers require DOCSIS 3.0 or higher. Because this modem only supports up to DOCSIS 2.0, it is unlikely to be compatible with modern cable internet plans. Check with your provider before purchasing.
No. The DCM425 is a modem only. You will need a separate router to share the connection across multiple devices or to get Wi-Fi.

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