1. Rematadoview
The AT&T Internet Air 5G Gateway (Model NCM1120D2) provides ultra-fast internet connectivity powered by AT&T's 5G network. Designed for business internet data plans, this gateway is Wi-Fi 7 Ready, offering lower latency and increased bandwidth for multiple devices. Its plug-and-play design allows for quick internet access, and an intuitive web interface de usuario (Web UI) enables easy network customization. The device supports 4G LTE bands 2, 4, 5, 12, 14, 29, 30, 66, and 5G bands n2, n5, n14, n30, n66, n77. Please note that a Nano SIM card and associated services are not included and must be obtained separately from AT&T.
2. Contido do paquete
Asegúrate de que todos os elementos estean presentes no teu paquete:
- AT&T Internet Air 5G Gateway (Model NCM1120D2)
- Adaptador de alimentación
Note: A Nano SIM card and an active AT&T Business Data Plan are required for operation and are not included in this package.
3. Disposición do dispositivo
Familiarize yourself with the physical components and indicators of your AT&T Internet Air 5G Gateway.

Figura 1: diante e traseiro View con compoñentes etiquetados
Indicadores do panel frontal:
- LED 5G: Indica o estado da rede 5G.
- LED 4G: Indica o estado da rede 4G LTE.
- LED de wifi: Indica actividade da rede Wi-Fi.
- LED DO SISTEMA: Indicates overall system status.
Portos e botóns do panel traseiro:
- External Antenna Ports (ANT): Two SMA connectors for optional external antennas.
- Botón WPS: Para a configuración protexida de Wi-Fi.
- 2.5 GbE LAN Port (1): High-speed Ethernet port.
- 1 GbE LAN Ports (2, 3, 4): Standard Ethernet ports.
- Porto de alimentación DC: Conéctase ao adaptador de alimentación.
- Botón de restablecemento de fábrica: Recessed button to restore factory default settings.
- SIM Card Cover: Protects the SIM card slot.
- Ranura para tarxeta SIM: For inserting the Nano SIM card.
- Respiración: For device cooling.
4. Configuración
Follow these steps to set up your AT&T Internet Air 5G Gateway:
- Inserir a tarxeta Nano SIM:
- Locate the SIM Card Cover on the rear panel.
- Retire coidadosamente a tapa.
- Insert your activated Nano SIM card into the SIM Card Slot with the gold contacts facing down and the notched corner aligned correctly.
- Replace the SIM Card Cover securely.

Figure 2: Inserting the Nano SIM Card
- Conectar o adaptador de alimentación:
- Plug the provided power adapter into the DC Power Port on the rear of the gateway.
- Conecte o outro extremo do adaptador de alimentación a unha toma de corrente.
- Power On and Initial Boot:
- The gateway will automatically power on.
- Wait for the SYSTEM LED on the front panel to turn solid white, indicating the device is ready.
- Observe the 5G and 4G LEDs. A solid white light on either indicates a successful cellular connection.
- Colocación óptima:
- Place the gateway in an open area, away from obstructions, and preferably near a window for optimal cellular signal reception.
- Avoid placing it near large metal objects, concrete walls, or other electronic devices that may cause interference.
- Conectar dispositivos:
- Wi-Fi: Use the Wi-Fi network name (SSID) and password found on the device label or in the Web UI to connect your wireless devices.
- Ethernet: For wired connections, plug an Ethernet cable from your device into any of the LAN ports on the rear of the gateway.
5. Instrucións de funcionamento
Comprensión dos indicadores LED:
- Solid White (SYSTEM): Gateway is powered on and operating normally.
- Solid White (5G/4G): Connected to 5G or 4G LTE network.
- Solid White (WiFi): Wi-Fi is active and devices are connected.
- Flashing (Any LED): Indicates activity or a specific status (refer to the full online manual for detailed flashing codes).
- No Light (Any LED): Feature is off or not connected.
Accedendo ao Web IU:
O Web UI allows for advanced configuration and monitoring of your gateway.
- Connect a device to the gateway via Wi-Fi or Ethernet.
- Abrir a web browser and enter the default gateway IP address (usually
192.168.1.254or similar, check the device label). - Enter the administrator password (found on the device label) to log in.
- Dende o Web UI, you can:
- Cambiar o SSID e o contrasinal da wifi.
- Configure advanced network settings (e.g., port forwarding, firewall).
- Monitor connected devices and data usage.
- Actualizar firmware.
Configuración protexida por Wi-Fi (WPS):
For quick and easy connection of WPS-compatible devices:
- Press the WPS button on the rear of the gateway.
- Within two minutes, activate WPS on your client device.
- Os dispositivos conectaranse automaticamente.
6. Mantemento
- Limpeza: Use a soft, dry cloth to clean the exterior of the gateway. Do not use liquid cleaners or aerosols.
- Ventilación: Ensure the gateway's vents are not obstructed to prevent overheating. Maintain adequate airflow around the device.
- Actualizacións de firmware: Comprobe e instale regularmente actualizacións de firmware a través do Web Interfaz de usuario para garantir un rendemento e unha seguridade óptimos.
- Reinicio: If you experience connectivity issues, try restarting the gateway by unplugging the power adapter for 10 seconds and then plugging it back in.
7 Solución de problemas
- Sen conexión a Internet:
- Check if the 5G or 4G LED is solid white. If not, reposition the gateway for better signal.
- Ensure your Nano SIM card is correctly inserted and activated with an AT&T Business Data Plan.
- Reinicie a pasarela.
- Velocidade de internet lenta:
- Verify optimal gateway placement.
- Check for network congestion (too many devices connected or high data usage).
- Ensure your devices are using the appropriate Wi-Fi band (5GHz for faster speeds, 2.4GHz for wider range).
- Desconexións wifi:
- Comprobe se hai interferencias doutros dispositivos electrónicos.
- Ensure your device is within the Wi-Fi range.
- Actualiza os controladores Wi-Fi do teu dispositivo.
- Restablecemento de fábrica: If issues persist, a factory reset can resolve many problems. Use a paperclip or similar pointed object to press and hold the recessed Factory Reset Button on the rear panel for about 10 seconds until the LEDs flash. This will erase all custom settings.
8. Especificacións
| Número de modelo | NCM1120D2-D323 |
| Dimensións do paquete | 11.14 x 8.39 x 5.67 polgadas |
| Peso do elemento | 2.64 libras |
| Tecnoloxía de conectividade | 5G, Wireless |
| Clase de banda de frecuencia | Dobre banda |
| Estándar de comunicación sen fíos | 802.11ax (Wi-Fi 6/7 Ready) |
| Tipo de antena | Interno |
| Sistema Operativo | Custom Linux-based operating system |
| Compoñentes incluídos | Pasarela |
9. Garantía e soporte
This product is sold as 'Amazon Renewed'. For warranty information and support related to the renewed condition of the device, please refer to the Amazon Renewed program terms and conditions.
For service-related inquiries, data plans, or technical support specific to AT&T Internet Air 5G services, please contact AT&T customer support directly.
You can find additional support resources and the full user manual by visiting the AT&T support websitio web ou poñéndose en contacto co seu servizo de atención ao cliente.





