Cm820 Arris Modem

The Arris CM820 is currently positioned as a legacy, budget-friendly DOCSIS 3.0 modem, suitable for users on mid-tier internet plans (under 300–400 Mbps). While it remains highly reliable for basic browsing and HD streaming, it is being rapidly phased out by ISPs in favor of DOCSIS 3.1 technology to support gigabit speeds HardwizesUbuy.

Product & Performance Insights

* Technical Specs: Features 8x4 channel bonding (8 downstream, 4 upstream) and supports both IPv4 and IPv6 Hardwizes. It typically provides a maximum downstream rate of 300–343 Mbps UbuyEbay.

* Key Features: Includes a built-in MoCA rejection filter to prevent interference with home entertainment and is certified for major providers like Comcast Xfinity and Spectrum UbuyManuals.

* User Feedback: Customers value its "plug-and-play" simplicity but frequently note its lack of built-in Wi-Fi and obsolescence for high-speed fiber or gigabit plans UbuyUbuy.

Market Trends & Availability

* Pricing: New-old stock or refurbished units retail for $60–$100, while second-hand units can be found for significantly less HardwizesGerhemder.

* Wholesale Market: In B2B channels, the CM820 is often sold as surplus or refurbished stock. Prices can drop as low as $9 per unit for bulk orders (e.g., MOQ of 100) Alibaba.

* Outlook: The market is shifting entirely toward DOCSIS 3.1. The CM820 is best recommended for budget-conscious consumers or small offices that do not require ultra-high-speed connectivity.