FRITZ!Box 7340 Service - Knowledge Base

FRITZ!Box 7340 Service

FRITZ!Box does not detect a mobile broadband dongle

The FRITZ!Box does not detect a mobile broadband dongle. The dongle is not displayed in the user interface under "Home Network > USB Devices > Overview of Devices" when you connect it to the FRITZ!Box.

Simply proceed as described below. After each measure, check whether the issue persists.

1 Installing the latest FRITZ!OS

2 Using a compatible mobile broadband dongle

  • Use a mobile broadband dongle that supports the mobile standard UMTS/HSPA (3G).

    Note:The FRITZ!Box does not support mobile broadband dongles that comply with the LTE standard (4G).

3 Checking whether the mobile broadband dongle is working properly

  • For testing purposes, connect the mobile broadband dongle directly to a USB port on your computer.
    • If the computer does not detect the mobile broadband dongle, then the mobile broadband dongle is defective. In this case, contact the manufacturer.

4 Connecting a mobile broadband dongle directly to the FRITZ!Box

The following step is only necessary if the mobile broadband dongle is connected to the FRITZ!Box by means of a USB hub:

  • For testing purposes, connect the mobile broadband dongle directly to the FRITZ!Box (i.e. without a USB hub).
    • If the mobile broadband dongle is now detected, then the USB hub is either defective or it does not support the mobile broadband dongle you connected.

5 Using an external power supply

  1. Remove all USB devices from the FRITZ!Box.
  2. Connect only the mobile broadband dongle to the FRITZ!Box by means of a USB hub with its own power supply (active USB hub).
    • If the mobile broadband dongle is now detected, then its power consumption exceeds 500 mA. It can therefore only be used if you connect it to the FRITZ!Box by means of an active USB hub.

      Important:The FRITZ!Box supplies USB devices with up to 500 mA in accordance with the USB 2.0 specification. If you would like to connect more than one USB device without its own power supply, then the second device may not consume more than 100 mA. Connect devices that require more power to the FRITZ!Box by means of a USB hub with its own power supply (active USB hub).