NETGEAR CM500 Cable Modem DOCSIS 3.0 for 300Mbps

NETGEAR CM500 is a Cable Labs–certified DOCSIS 3.0 modem that delivers cable Internet access for plans up to 300 Mbps and replaces provider rental modems. The CM500 is a single-unit cable modem built to connect your home network to the internet through major U.S. cable providers like Comcast XFINITY and Cox. It uses 16x4 channel bonding to handle higher downstream capacity than older modems, offers a single gigabit Ethernet port to pair with any WiFi router, and helps eliminate monthly rental fees when you use your own device. Note: it does not support bundled cable voice/telephone services.

How fast will my internet run with the CM500?

The CM500 supports cable plans up to 300 Mbps, but actual speed depends on your service plan and network conditions. It was engineered with 16 downstream and 4 upstream channels to increase throughput compared with DOCSIS 2.0 hardware.

• Compatible with many provider tiers up to 300 Mbps.
• 16x4 channel bonding for improved downstream capacity.
• Real-world speeds depend on your ISP plan and local network load.

Will this modem work with my WiFi router and devices?

Yes — the CM500 connects to any standard WiFi router via its gigabit Ethernet port. It functions strictly as a modem; WiFi is provided by a separate router that you either already own or can purchase separately.

• Single Gigabit Ethernet port to connect a router or PC.
• Works with third-party routers for flexible wireless setups.
• Keeps modem and router roles separate for easier troubleshooting.

Which cable providers are compatible with the CM500?

The CM500 is compatible with major U.S. cable providers including Comcast XFINITY and Cox. Because carrier policies can change, check your provider’s approved modem list before purchasing or activating the device.

• Cable Labs certified for broad provider compatibility.
• Confirmed working with XFINITY and Cox for supported speed tiers.
• Not compatible with cable voice (telephone) bundles—data only.

How much can I save by using the CM500 instead of renting?

Using your own modem typically removes monthly rental charges from your bill, which can add up quickly. NETGEAR estimates potential savings around $168 per year compared to typical provider rental fees, depending on your provider’s charges.

• Eliminates recurring monthly modem rental fees.
• One-time purchase versus ongoing rental expenses.
• Savings vary by provider and region; verify local rental rates.

Who is this for: The CM500 is a practical choice for households that subscribe to cable Internet plans in the low-to-mid speed ranges and want to avoid monthly rental fees. It’s ideal for users who already own—or plan to buy—a separate WiFi router, need reliable wired performance for streaming or remote work, and do not require bundled voice service. Before buying, confirm your ISP supports this modem model and that your subscribed plan matches the modem’s capacity.

FAQ

Q: Does the CM500 include built-in WiFi?

A: No. The CM500 is a modem only; you must connect a separate WiFi router for wireless coverage.

Q: Can I use the CM500 with XFINITY or Cox?

A: Yes. The CM500 is compatible with XFINITY and Cox for supported speed tiers, but confirm ISP approval before activating.