FRITZ!Box 3390 Serwis - Baza wiedzy

FRITZ!Box 3390 Serwis

"Power" LED flashes

The FRITZ!Box's Power LED flashes? ✔ Here you can find out what this means and how to solve the problem.

As soon as you connect your FRITZ!Box to your DSL line, the FRITZ!Box establishes a connection to the DSL provider's exchange. This can take up to 10 minutes. During this time, the "Power" LED on the FRITZ!Box flashes. It stays lit as soon as the DSL connection has been established.

This guide shows you how to resolve the following errors:

  • The FRITZ!Box's "Power" LED flashes continuously.
  • The FRITZ!Box does not establish a DSL connection.

The following error message is displayed in the event log of the FRITZ!Box:

  • "DSL not responding (no DSL synchronization)"

Simply proceed as described below. After each measure, check whether the problem is solved.

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

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. If the message "DSL is available (DSL synchronization exists with [...] kbit/s)" is displayed in addition to the message "DSL not responding", follow the steps in our guide FRITZ!Box reports that the DSL connection drops frequently.

2 Making sure that the DSL line is supported

3 Selecting the DSL standard

The following step is only necessary if you are using the FRITZ!Box on an ADSL line (this is not necessary with VDSL lines):

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "DSL Information" in the "Internet" menu.
  3. Click on the "Interference Resistance" ("Line Settings") tab. If the tab is not displayed, enable the Advanced View first.
  4. In the section "Annex Settings", select whether your FRITZ!Box is connected to a DSL line that uses Annex A or Annex B.

    Note:In Germany, Annex B is always used, other countries almost always use Annex A. Contact your DSL provider to find out which standard is used on your DSL line.

  5. Click "Apply" to save the settings.

4 Checking the cabling

It is often difficult to recognize mistakes in the cabling and they can remain unnoticed for a long time. Therefore, check the wiring in your home:

  1. Remove the DSL splitter if you are using the FRITZ!Box on an IP-based connection.
  2. Remove all cable extensions, unused cables, telephone jacks, and additional electrical components (for example surge protection, automatic extension outlets).
  3. Make sure that the FRITZ!Box is correctly connected to your DSL line. For detailed information, refer to the quick guide included with the FRITZ!Box and the manual.

5 Resetting the interference resistance

Set the controls for interference resistance to "maximum performance" since otherwise you will not be able to establish a DSL connection with some DSL lines:

Note:The controls for interference resistance should only be set to "maximum stability" if your DSL connection is occasionally interrupted.

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "DSL Information" in the "Internet" menu.
  3. Click on the "Interference Resistance" ("Line Settings") tab. If the tab is not displayed, enable the Advanced View first.
  4. Click the "Reset Setting" link.
    • Now the interference resistance is automatically set to "Maximum Performance".

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

Installing the latest FRITZ!OS makes your FRITZ!Box compatible with the latest DSL technology used by DSL providers in their DSL exchanges:

7 Checking the DSL line

There may be a problem with the DSL line. Since it may take a while for your DSL provider to check your line, you may be charged for the service, and our experience shows that there is often a problem with DSL lines even if they have been checked by your provider, proceed as follows:

  1. Either: Test whether a different DSL modem works on your DSL line.
    • Or: Test whether the FRITZ!Box can establish a DSL connection on a different DSL line, for example at your neighbor's.

      Note:Only connect the FRITZ!Box to the DSL line and the power mains. A DSL connection was established if the "Power" LED remains lit after no more than 10 minutes.

  2. If another modem also does not work on your line, or if your FRITZ!Box can establish a DSL connection on a different line, there is a problem with your DSL line. Contact your DSL provider and have them check your DSL line.

    ATTENTION!You may be charged for checking. Ask your provider about charges in advance!