Set up Internet phone numbers in FRITZ!Box

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Summary

In the FRITZ!Box, you can configure up to 20 Internet phone numbers to make calls via the Internet (Voice over IP). With most Internet telephony providers, the FRITZ!Box automatically carries out all provider-specific settings, with some providers the numbers are even set up automatically when setting up Internet access. Phone numbers with the same access data, such as those used by Telekom or Vodafone, can also be grouped together and managed together.

In addition to this standard configuration, the FRITZBox also supports the configuration of SIP trunks and SIP system connections.

Requirements/Restrictions

It is not possible to set up a Vodafone SIP trunk, because the FRITZ!Box only supports the "Registered Mode" operating mode. The "Static Mode" is not supported.

Note: All function and setting notes in this manual refer to the current FRITZ!OS of the FRITZ!Box.

Description

Step 1: Enter location details

 1. Click on "Telephony" in the user interface of the FRITZ! box.

 2. In the "Telephony" menu, click on "Own phone numbers".

 3. Click on the "Connection settings" tab.

 4. Select your country in the drop-down list under "Location information". If your country cannot be selected, select "Other country".

 5. Enter the leading zeros in the first field under "Country code" and the country code in the second field (e.g. for Austria "00" and "43").

 6. Enter the leading zero in the first field and the area code in the second field under "Area code" (e.g. for Vienna "0" and "01").

 7. To save the settings, click on "Apply" and confirm the execution additionally on the FRITZ! box, if you are asked to do so.

Step 2: Configure Internet phone number

  • Configure Internet phone number (default):

 1. Click on "Telephony" in the user interface of the FRITZ! box.

 2. In the "Telephony" menu, click on "Own phone numbers".

 3. Click on the "New phone number" button.

 4. If necessary, activate the "Internet phone number" option and click on "Next".

 5. Select your Internet telephony provider from the drop-down list. If your provider does not exist, select "other provider".

 6. Enter the Internet phone number (phone number) and the login data (e.g. user name, password, registrar) in the corresponding input fields.
  You will receive the data from your provider.

 7. If the option "Transmit outgoing emergency calls without area codes" is displayed, check with your provider whether emergency calls
  must be transmitted with or without area codes.Then make the correct setting.

 8. If the option "Transmit special numbers without area codes" is displayed, check with your provider whether special numbers
  must be transmitted with or without area codes.Then make the correct setting.

 9. If the option "Insert area code for outgoing calls" is displayed, activate the option. The area code is then automatically
  added to local calls over the Internet and you do not need to dial it.

 10. Click "Next" and follow the instructions of the wizard.

  • Setting up an Internet phone number (SIP trunk):

 If you have booked a SIP trunk with a provider, set it up that way:

Note: A telecom SIP trunk, e.g. the tariff "Austria LAN SIP-Trunk Pooling" must be set up as described in this manual.

 1. Click on "Telephony" in the user interface of the FRITZ! box.

 2. In the "Telephony" menu, click on "Own phone numbers".

 3. Click on the "New phone number" button.

 4. Activate the "Internet phone number" option and click on "Next".

 5. Select your SIP trunk provider from the drop down list. If your provider is not available, select "SIP trunking with different phone numbers".

 6. Enter all the numbers of the SIP trunking provider that you want to assign to telephony devices on the FRITZ! box.
  To open additional input fields, click on "Additional phone number".

 7. Enter the login data (e.g. user name, password, registrar) in the corresponding input fields. You will receive the data from your provider.

 8. If the option "Transmit outgoing emergency calls without area codes" is displayed, contact your provider to find out whether emergency calls
  must be transmitted with or without area codes.Then make the correct setting.

 9. If the option "Transmit special numbers without area codes" is displayed, check with your provider whether special numbers must be
  transmitted with or without area codes.Then make the correct setting.

 10. If the option "Insert area code for outgoing calls" is displayed, activate the option. The area code is then automatically added
  to local calls over the Internet and you do not need to dial it.

 11. Click "Next" and follow the instructions of the wizard.

  • Setting up an Internet phone number (SIP system connection)

 If you have booked a SIP system connection with a provider, set it up that way:

 1. Click on "Telephony" in the user interface of the FRITZ! box.

 2. In the "Telephony" menu, click on "Own phone numbers".

 3. Click on the "New phone number" button.

 4. Activate the "Internet phone number" option and click on "Next".

 5. Select "SIP system connection" from the drop-down list.

 6. Enter the root number of the SIP system connection.

 7. Enter the extension number of the exchange.

 8. Select the length of the longest internal extension from the drop-down list.

 9. If you connect all telephony devices on an ISDN telephone system to the "FON S0" connection of the FRITZ! box, do not enter any further
  telephone numbers. If you also use other telephony interfaces of the FRITZ!Box (e.g. "DECT" or "FON 1"), enter all extension numbers
  (root number plus extension) that you want to use there.At these interfaces, only the maximum 20 entered extensions are available,
  at your ISDN telephone system, however, more than 20 extensions are available.

 10. Enter the logon data (e.g. user name, password, registrar) in the corresponding input fields. You will receive the data from your provider.

 11. If the option "Transmit outgoing emergency calls without area codes" is displayed, please contact your provider to find out whether emergency calls
  must be transmitted with or without area codes. Then make the correct setting.

 12. If the option "Transmit special numbers without area codes" is displayed, check with your provider whether special numbers must be transmitted
  with or without area codes. Then make the correct setting.

 13. If the option "Insert area code for outgoing calls" is displayed, activate the option. The area code is then automatically added to local calls
  over the Internet and you do not need to dial it.

 14. Click "Next" and follow the instructions of the wizard.

Step 3: Login information for "other provider"

If you have selected "other provider" in the setup wizard and the phone number is not registered after setup, you may have to adjust the registration data. For preset Internet telephony providers, the FRITZ!Box automatically makes the correct settings:

  • Use own phone number for registration

 1. Click on "Telephony" in the user interface of the FRITZ!Box.

 2. In the "Telephony" menu, click on "Own phone numbers".

 3. Click on the button for the respective Internet phone number.

 4. Activate or deactivate the option "Use phone number for registration". Whether you have to activate the option depends on the provider.
  Try both settings or contact your provider for more information. There is no uniform name for this setting. The technical name is "SIP-URI".

 5. Click "OK" to save the settings.

  • Use REGISTER-fetch

 1. Click on "Telephony" in the user interface of the FRITZ!Box.

 2. In the "Telephony" menu, click on "Own phone numbers".

 3. Click on the button for the respective Internet phone number.

 4. Enable or disable the option "The provider does not support REGISTER-fetch". If the option is not displayed, first activate the Extended View.
  Whether you have to activate the option depends on the provider. Try both settings or contact your provider.

 5. Click "OK" to save the settings.

Step 4: Activate registration via Internet connection

Some Internet service providers set up a second Internet connection for Internet telephony, which can only be used with the telephone numbers of the Internet service provider. Therefore, activate the following option if your Internet phone number does not originate from your Internet provider. The FRITZ!Box will then use the same connection for this number that you use to surf the Internet:

 1.Click on "Telephony" in the user interface of the FRITZ!Box.

 2.In the "Telephony" menu, click on "Own phone numbers".

 3.Click on the button for the respective Internet phone number.

 4.Activate the option "Always log on via an Internet connection".

 5.Click "OK" to save the settings.

Step 5: Enter VLAN ID for Internet telephony

Only perform this action if your Internet telephony provider requires a VLAN ID for Internet telephony:

 1.Click on "Telephony" in the user interface of the FRITZ! box.

 2.In the "Telephony" menu, click on "Own phone numbers".

 3.Click on the "Connection settings" tab.

 4.Click on "Change settings" in the "Telephony connection" section. If the section is not displayed, first activate the Advanced View.

 5.Click on "Connection settings for DSL/WAN".

 6.Activate the option "VLAN required for Internet telephony".

 7.In the entry fields "VLAN ID" and "PBit" enter the values required by your Internet telephony provider.

 8.Click "Apply" to save the settings.

Step 6: Activate Internet telephony via mobile phone

Carry out this action only if the FRITZ!Box is set up for Internet access via mobile phone and you also want to make Internet calls when the FRITZ!Box establishes the Internet connection via mobile phone:

Note: Some mobile operators have stipulated in their tariff regulations that the mobile Internet connection may not be used for Internet telephony. Ask your provider for the regulations!

 1.Click on "Internet" in the user interface of the FRITZ! box.

 2.Click on "Access data" in the "Internet" menu.

 3.Activate the option "Use Internet phone numbers via mobile connection".

 4.Click "Apply" to save the settings.

Used Hardware

References