FRITZ!Box 6840 LTE – Service - Knowledge Base

FRITZ!Box 6840 LTE – Service

LTE connection drops frequently

The LTE connection between your FRITZ!Box and your LTE provider drops frequently (several times a day). When this occurs, the "Power" LED on the FRITZ!Box flashes and stays lit as soon as the Internet connection has been re-established. The following error message may be displayed in the event log of the FRITZ!Box:

  • "LTE no longer responding"

Cause

  • The stability of the LTE connection depends on the distance from the LTE base station and the shielding effect of the walls of your own house. It can also be affected if the LTE antennas were not properly connected or if your LTE provider is experiencing technical difficulties.

Important:Some of the settings described here are only displayed if the advanced view is enabled in the user interface. The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS

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

1 Checking the event log of the FRITZ!Box

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Event Log" in the "System" menu.
  3. Check whether there are events listed that occurred before and while the error occurred, or whether there are only events that occurred after the error occurred.
    • If events that occurred before and while the error occurred are also displayed:
      • Proceed with the following section.
    • If only events that occurred after the error are displayed:

2 Installing the latest FRITZ!OS for the FRITZ!Box

Installing the latest FRITZ!OS makes your FRITZ!Box compatible with the latest LTE technology used by LTE providers in their radio cells:

3 Checking the LTE antennas

Mistakes made when connecting the LTE antennas can often be overlooked. Therefore, check whether the LTE antennas were connected correctly to your FRITZ!Box:

  • Check the pin in the connector of both LTE antennas. If the pin is bent or has broken off, there can be no contact between the LTE antenna and the FRITZ!Box.
  • Make sure that both of the LTE antennas included in the package are correctly screwed onto the sockets labeled "LTE" on the FRITZ!Box.
  • Swap the LTE antennas connected to the two LTE antenna sockets on the FRITZ!Box. Check whether the FRITZ!Box is then able to establish an LTE connection.
  • Only if you are using an outdoor LTE antenna: Check whether you can establish an LTE connection if you use a different outdoor LTE antenna or a different LTE antenna cable. This way you can determine whether the outdoor LTE antenna or LTE antenna cable is not suitable or is defective.

    Note:If you are using the FRITZ!Box in the indoor coverage area of your LTE provider, test whether you can establish an LTE connection if you use the original LTE antennas included in the package.

4 Finding the ideal location for the FRITZ!Box

You can use the alignment aid to find the ideal location for the FRITZ!Box and the best position for the LTE antennas:

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "Account Information" in the "Internet" menu.
  3. Select the frequency band "Only 2.6 GHz / band 7".

    Note:Normally you can achieve a higher data throughput with the 2.6 GHz frequency band than with the 800 MHz frequency band.

  4. Click "Apply" to save your settings.
  5. Click "LTE Information" in the "Internet" menu.
  6. Click on the "Reception" tab.
  7. Click the "Start Alignment Aid" button.
    • Now the FRITZ!Box shows the signal strength for both LTE antennas.

      Note:When the alignment aid is active, the current signal strength is also displayed in a five-level display on the FRITZ!Box LEDs. This means that you can also find the best location for the FRITZ!Box without using the FRITZ!Box user interface.

  8. Select a location for the FRITZ!Box where the value shown is as high as possible. When doing so, note the following:
    • Do not set up the FRITZ!Box in the corner of a room.
    • Position the FRITZ!Box as close to an outside wall as possible.

      Important:If you know where your provider's LTE radio cell is located, position the FRITZ!Box by the wall facing the LTE radio cell.

    • Position the FRITZ!Box so that it is as unobstructed as possible, i.e. not directly in back of or under an obstacle (for example pieces of furniture, heater).
    • Position the LTE antennas of the FRITZ!Box so that they are as perpendicular as possible (90° angle). For example, position one antenna vertically and the other horizontally.
  9. If the quality of the LTE connection in the 2.6 GHz frequency band is not sufficient:
      1. Click "Account Information" in the "Internet" menu.
      2. Select the frequency band "Only 800 GHz / band 20".
      3. Click "Apply" to save your settings.
      4. Click "LTE Information" in the "Internet" menu.
      5. Click on the "Reception" tab.
      6. Start the alignment aid and repeat the adjustment procedure for the FRITZ!Box.

5 Connecting an outdoor LTE antenna

The following step is only necessary if you are using the FRITZ!Box in an area located on the edge (outdoor coverage area) of the LTE radio coverage area of your LTE provider:

Note:Internal LTE antennas may not be sufficient for an LTE connection if you are using your FRITZ!Box in the outdoor coverage area of your provider's radio coverage. Your LTE provider can tell you whether you are using the FRITZ!Box in their indoor or outdoor coverage area.

  • Connect an outdoor LTE antenna to the FRITZ!Box.

    Note:If you are using your FRITZ!Box outside of the outdoor coverage area of your LTE provider, outdoor antennas on the balcony or roof may also not be sufficient for your LTE connection.