1. Introducción
The NETGEAR Nighthawk CM3000 is a DOCSIS 3.1 mid/high-split cable modem designed to support high-speed internet plans. It is compatible with major U.S. cable internet service providers, including Xfinity, Spectrum, and Cox. This modem is engineered to deliver download speeds up to 2.5Gbps and upload speeds up to 1Gbps, enhancing performance for activities such as 4K/8K streaming, online gaming, video conferencing, and large file transfers. Owning your modem can also eliminate monthly rental fees from your internet service provider.
Video: Understanding the role of a modem and how it works to provide fast, reliable internet in your home.
2. Contenido del paquete
Verifique que su paquete contenga los siguientes elementos:
- Nighthawk High-Split 2.5Gbps Internet Speed Cable Modem (CM3000)
- Un (1) cable Ethernet
- Guía de instalación rápida
- Adaptador de corriente
3. Características físicas
The CM3000 modem features a sleek, vertical design with indicator lights on the front panel and various ports on the rear for connectivity.

Imagen: Frente view of the NETGEAR Nighthawk CM3000 cable modem, showcasing its vertical design and indicator lights.
Indicadores del panel frontal:
- LED de encendido: Indica el estado de energía.
- LED de bajada: Indicates downstream channel bonding status.
- LED de subida: Indicates upstream channel bonding status.
- LED de Internet: Indica el estado de la conectividad a Internet.
- LAN 1/2 LEDs: Indicate Ethernet port activity.
Puertos del panel trasero:

Imagen: Trasera view of the NETGEAR Nighthawk CM3000 cable modem, showing the Multi-Gig Ethernet port, two Gigabit Ethernet ports, cable coaxial connector, and power input.
- Multi-Gig Ethernet Port (2.5G/1G): Connects to your router for multi-gig internet speeds.
- LAN 1/2 Gigabit Ethernet Ports (1G): Can be used individually or with link aggregation for up to 2Gbps when connected to a compatible router.
- Cable Coaxial Connector: Connects to your cable wall outlet.
- Entrada de energía: Se conecta al adaptador de corriente.
4. Configuración
Follow these steps to set up your NETGEAR Nighthawk CM3000 cable modem:
- Conecte el cable coaxial: Connect one end of a coaxial cable (not included) to the cable wall outlet and the other end to the Cable connector on the back of your CM3000 modem. Ensure the connection is finger-tight.
- Conecte el cable Ethernet: Connect one end of the provided Ethernet cable to the Multi-Gig Ethernet port (yellow) on the back of your CM3000 modem. Connect the other end to the WAN or Internet port on your WiFi router.
- Conecte el adaptador de corriente: Plug the power adapter into the modem's power input and then into a power outlet. The modem will power on and the LEDs on the front panel will begin to light up. Wait for the Power, Downstream, Upstream, and Internet LEDs to turn solid white or blue, indicating a stable connection. This may take several minutes.
- Activa tu servicio de Internet: Once the modem is online, you will need to activate your internet service. This typically involves contacting your internet service provider (ISP) and providing them with the modem's MAC address and serial number, which are usually found on a label on the modem. Some ISPs may allow self-activation through a web portal.

Image: A visual guide demonstrating the simple connection process of the CM3000 cable modem to a power outlet and a WiFi router.
Vídeo: Un breve resumenview of the NETGEAR CM3000 modem, highlighting its capabilities for faster uploads and reliable speeds.
5. Operando
Once your CM3000 modem is successfully set up and activated, it will provide internet connectivity to your connected router. The router will then distribute the internet connection to your devices via WiFi or additional Ethernet ports.
Indicadores de estado LED:
- Blanco sólido/azul: Indicates a stable and active connection.
- Parpadeo: Indicates activity or a connection in progress.
- Apagado: Indicates no power or no connection.
For optimal performance, consider pairing your CM3000 modem with a NETGEAR WiFi 6E or WiFi 7 router or an Orbi mesh system.

Image: The CM3000 cable modem shown alongside a NETGEAR Orbi WiFi 7 Mesh System and a Nighthawk WiFi 7 Router, illustrating compatibility for maximizing network performance.
6. Mantenimiento
To ensure the longevity and optimal performance of your CM3000 cable modem, follow these maintenance guidelines:
- Colocación: Place the modem in a well-ventilated area, away from direct sunlight, heat sources, and moisture. Ensure there is adequate airflow around the device to prevent overheating.
- Limpieza: Regularly dust the modem with a soft, dry cloth. Avoid using liquid cleaners or abrasive materials, as these can damage the device.
- Conexiones de cable: Periodically check all cable connections (coaxial, Ethernet, power) to ensure they are secure and free from damage. Loose connections can lead to intermittent service.
- Actualizaciones de firmware: NETGEAR may release firmware updates to improve performance, add features, or address security vulnerabilities. These updates are typically managed by your ISP, but you can check the NETGEAR support website for information on manual updates if necessary.
- Ciclo de potencia: If you experience internet issues, a simple power cycle (unplugging the modem for 30 seconds and then plugging it back in) can often resolve minor connectivity problems.
7. Solución de problemas
If you encounter issues with your CM3000 modem, try the following troubleshooting steps:
- Sin conexión a Internet:
- Check all cable connections. Ensure the coaxial cable is securely connected to the wall outlet and the modem.
- Verify that the Ethernet cable is securely connected between the modem and your router.
- Power cycle the modem and router. Unplug both devices from power, wait 30 seconds, then plug the modem back in. Once the modem is fully online (LEDs stable), plug in the router.
- Check the modem's LED indicators. If the Internet LED is not solid, contact your ISP.
- Velocidades lentas de Internet:
- Asegúrese de que su plan de Internet admita las velocidades que espera.
- Perform a speed test with a wired connection directly to the modem (bypassing the router) to isolate the issue.
- Check for excessive network traffic or too many devices simultaneously using bandwidth.
- Contact your ISP to check for any network outages or signal issues in your area.
- Conexiones interrumpidas:
- Ensure the modem is not overheating. Check its placement and ventilation.
- Inspeccione los cables coaxiales para detectar daños o conexiones sueltas.
- Contact your ISP to check for signal interference or line quality issues.
8. Especificaciones
| Característica | Especificación |
|---|---|
| Marca | NETGEAR |
| Número de modelo | CM3000-100NAS |
| Estándar DOCSIS | DOCSIS 3.1 (Mid/High-Split) |
| Download Speeds | Hasta 2.5 Gbps |
| Upload Speeds | Hasta 1 Gbps |
| Puertos Ethernet | 1x 2.5 Gigabit Ethernet, 2x 1 Gigabit Ethernet (with Link Aggregation support) |
| ISP compatibles | Xfinity, Spectrum, Cox, Optimum, and more |
| Peso del artículo | 1.09 libras |
| Dimensiones del producto | 6.8 x 3.7 x 8.2 pulgadas |
9. Garantía y soporte
The NETGEAR Nighthawk CM3000 cable modem typically comes with a 1-year limited hardware warranty. For specific warranty details and terms, please refer to the warranty information included with your product or visit the official NETGEAR support websitio.
For technical support, product registration, and access to additional resources, visit the NETGEAR support website or contact their customer service. You may need your product's model number and serial number when seeking support.
Vídeo: Un producto másview video providing visual details and features of the NETGEAR Nighthawk CM3000.





