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Home Networking · Topic
Every Home Networking article tagged DOCSIS 3.1, newest first.
13 articles
Internet down and Spectrum says your modem isn't supported anymore? Here's why it happened, how to confirm it's the modem and not an outage, what Spectrum will replace at no charge, and the quickest DOCSIS 3.1 replacements that activate in minutes.
Review
The S33 and S34 are the same modem except for one thing: the S34 supports mid-split uploads. Whether that matters depends entirely on your plan and your ISP's network.
One owned combo replaces Spectrum's free modem and its $10 per month WiFi router. The best Spectrum-compatible combos of 2026, plus who should skip them.
Gaming
Gaming modems are mostly marketing. Every DOCSIS 3.1 modem ships anti-bufferbloat tech; your ISP decides if it runs. Here is what actually lowers ping.
Review
The best DOCSIS 3.1 modems of 2026, ranked by speed tier and ISP. See which modem fits your plan, which ones support faster uploads, which combos are worth it, and why 3.1 is still the right buy while retail DOCSIS 4.0 modems...
Every modem currently approved for Xfinity in 2026, audited against Comcast's official list: what was removed in April, and which model fits your plan.
Review
Xfinity is steadily dropping DOCSIS 3.0 modems from its approved list, and unsupported models can stop activating. Learn how to check your modem and pick the right DOCSIS 3.1 replacement by speed tier.
DOCSIS 4.0
DOCSIS 4.0 promises symmetrical multi-gig speeds, but DOCSIS 3.1 still powers most cable internet today. Here is the real difference, in plain English.
Buying guide
Still renting your Xfinity gateway? Save $180+/year by owning your own modem-router combo. We compare the 5 best Xfinity-compatible options for 2026 — from the budget-friendly ARRIS G34 to the Wi-Fi 7 ARRIS G54 — with specs, pricing, and setup instructions.
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DOCSIS 4.0
DOCSIS 4.0 promises symmetrical multi-gigabit speeds over existing cable lines, but retail modems are not available yet. Here is what you need to know before deciding whether to upgrade from DOCSIS 3.1 in 2026.
While standard DOCSIS 3.1 isn't natively symmetrical, mid-split and high-split upgrades are changing the game for cable internet. Learn how to unlock upload speeds up to 500+ Mbps by choosing the right ISP-certified modem and understanding your local network's capabilities.
Review
The Arris S33 and SB8200 share the same chipset and DOCSIS 3.1 performance. The real difference is the S33's 2.5 Gbps port, which only matters on plans above 1 Gbps.
Review
Spectrum stops supporting DOCSIS 3.0 modems on October 28, 2026. Here is how to tell if yours is affected, the best DOCSIS 3.1 replacement for each Spectrum plan, and which models to avoid.
