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Knowledge document #3551

Setting up FRITZ!Box for use with a T-Mobile line

The FRITZ!Box is optimally prepared for use with T-Mobile Thuis. Simply connect the FRITZ!Box to the internet connection, select T-Mobile as the internet service provider in the FRITZ!Box, and set up telephony. The complete FRITZ!Box range of functions for internet, telephony, and multimedia is then available to all of the devices in your home network without restriction.

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

1 Connecting the FRITZ!Box

  1. Connect the "WAN" port on the FRITZ!Box with the LAN port of the DSL or fiber optic modem (ONT, Optical Network Termination). For detailed information, refer to the quick guide included with the FRITZ!Box and the manual.

2 Configuring the internet connection in the FRITZ!Box

  1. Open the FRITZ!Box user interface.
  2. Enter the FRITZ!Box password on the bottom of the device and click "Log In".
  3. Click "Internet" and then "Account Information".
  4. Select "T-Mobile Thuis" from the drop-down list "Internet connection via".
  5. Click "Apply" to save the settings.

Now the FRITZ!Box checks whether the internet connection can be established. Configuration is completed as soon as the message "The internet connection check was successful" is displayed.

Important:If the internet connection check fails, your internet access may not have been activated yet. In this case, contact T-Mobile.

3 Setting up telephony in the FRITZ!Box

Having your login information ready

  1. Have the login information for telephony ready (for example the SIP username and password) that was displayed to you in the customer portal T-Mobile Thuis.

    Note:If your login information is not displayed in the customer portal, contact T-Mobile.

Configuring telephone numbers

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephone Numbers" in the "Telephony" menu.
  3. Click the "New Telephone Number" button.
  4. Select "Other provider" from the drop-down list.
  5. Enter your telephone number including the area code (for example 31201234567) by "Telephone number for registration".
  6. Enter your telephone number (for example 1234567) by "Internal telephone number in the FRITZ!Box".
  7. Enter the login information you received from T-Mobile by "Username" and "Password".
  8. Enter voip.t-mobilethuis.nl in the field "Registrar".
  9. Enter voip.t-mobilethuis.nl in the "Proxy server" field.
  10. Enter your area code by "Area code".
  11. Click "Next" and follow the wizard's instructions.

Assigning telephone numbers

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephony Devices" in the "Telephony" menu.
  3. Click the (Edit) button for the respective telephony device.

    Important:If the telephony device was not configured yet, click the "Configure New Device" button and follow the wizard's instructions.

  4. From the drop-down list "Outgoing Calls", select the number to be used by the telephony device for making calls. If you do not select a telephone number, the number entered under "Telephony > Telephone Numbers > Line Settings" is used for making outgoing calls.
  5. Select the numbers to which the telephony device should react when you receive calls. You can select up to ten numbers (including the number for outgoing calls).
  6. Click on "OK" to save the settings.