FRITZ!Box 3272 Service - Knowledge Base

FRITZ!Box 3272 Service
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Since updating FRITZ!OS, "Power" LED flashes

Since updating FRITZ!OS, the FRITZ!Box can no longer establish a DSL connection. The FRITZ!Box's "Power" LED flashes continuously since the update and the following error message is displayed in the event log of the FRITZ!Box:

  • "DSL not responding (no DSL synchronization)"

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 Restarting the FRITZ!Box

  1. Unplug the FRITZ!Box.
  2. Plug the FRITZ!Box back in after about 5 seconds.

    Note:The FRITZ!Box settings remain intact. The restart will take about 2 minutes. During this time, you cannot access the FRITZ!Box.

2 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 the error message "DSL not responding" is constantly displayed, or whether the FRITZ!Box an establishes an intermittent DSL connection and then displays the message when the connection drops.
  4. If the message "DSL not responding" is constantly displayed, proceed with the following section.

3 Resetting the interference resistance

Set the control for interference resistance to "Maximum Performance" since otherwise you will not be able to establish a DSL connection with some DSL lines:

Note:The interference resistance should only be changed if your DSL connection is occasionally interrupted (for example due to brief disturbances on the DSL line).

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "DSL Information" in the "Internet" menu.
  3. Click on the "Line Settings" tab.
  4. Click on the "Reset Setting" link.
    • The interference resistance is now automatically set to "Maximum Performance".

4 Using the previous DSL version

The DSL version of the FRITZ!Box undergoes constant development with each FRITZ!OS to ensure that it can establish optimal DSL connections under all circumstances. In individual cases (for example on DSL lines with outdated DSLAMs) the FRITZ!Box may only be able to establish a DSL connection with certain DSL versions. Therefore, enable previous DSL version:

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "DSL Information" in the "Internet" menu.
  3. Click on the "Line Settings" tab.
  4. Enable the option "Use previous DSL version".
  5. Click "Apply" to save the settings.

Now the previous DSL version is enabled and the FRITZ!Box is restarted. The restart will take about two minutes.