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Knowledge Base document #32

Configuring internet phone numbers in FRITZ!Box

You can configure up to 20 internet phone numbers (also called VoIP or SIP phone numbers) for making calls via the internet connection. The FRITZ!Box also allows you to configure SIP trunking and SIP DDI lines.

With some providers, your phone numbers are automatically configured in the FRITZ!Box when you configure the internet connection in the FRITZ!Box.

Requirements / Restrictions

  • It is not possible to configure a SIP trunk from Vodafone because the FRITZ!Box only supports the operating mode 'Registered Mode'. 'Static Mode' is not supported.

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

1 Entering your location information

  1. Click on 'Telephony' in the FRITZ!Box user interface.
  2. Click on 'Phone Numbers' in the 'Telephony' menu.
  3. Click on the 'Line Settings' tab.
  4. Select your country from the drop-down list under 'Location Information'. If your country is not listed, select 'Other country'.
  5. For the 'Country code', enter the leading zeros in the first field and the country code in the second field (for example, enter '00' and '49' for Germany).
  6. For the 'Area code', enter the leading zero in the first field and the area code in the second field (for example '0' and '30' for Berlin).

    Fig.: Entering the country code and area code (e.g. for Germany and Berlin)

  7. Click on 'Apply' to save the settings. On the FRITZ!Box, confirm that the procedure may be executed, if you are asked to do so.

2 Configuring internet phone numbers

Configuring an internet phone number (standard)

  1. Click on 'Telephony' in the FRITZ!Box user interface.
  2. Click on 'Phone Numbers' in the 'Telephony' menu.
  3. Click on the 'New Phone Number' button.
  4. If a drop-down list with internet telephony providers is displayed, select your provider. If your provider is not listed, select 'Other provider'.

    Note:Whether the drop-down list is available and which providers are displayed depends on the country you selected in the FRITZ!Box.

  5. Enter the internet number (phone number) and the account information (for example username, password, registrar) in the corresponding fields. This information is supplied by your provider.
  6. If the 'Relay outgoing emergency calls without prefixes' option is displayed, ask your provider whether calls to emergency numbers must be made with or without prefixes. Select the correct setting.
  7. If the 'Relay special rate numbers without prefixes' option is displayed, ask your provider if calls to special rate numbers must be made with or without prefixes. Select the correct setting.
  8. If the 'Insert area code for outgoing calls' option is shown, you can enable it. The area code is then automatically added when you make calls to numbers that do not begin with '0', so you do not have to enter it.
  9. Click on 'Next' and follow the wizard's instructions.

Configuring an internet phone number (SIP trunk)

If you ordered a SIP trunk from your provider, configure it as follows:

Important:SIP trunking from Deutsche Telekom, for example the package 'Deutschland LAN SIP-Trunk Pooling', must be configured as described in this guide.

  1. Click on 'Telephony' in the FRITZ!Box user interface.
  2. Click on 'Phone Numbers' in the 'Telephony' menu.
  3. Click on the 'New Phone Number' button.
  4. Select your SIP trunk provider from the drop-down list. If your provider is not listed, select 'SIP trunking with various phone numbers'.
  5. Enter all phone numbers of the SIP trunk provider that you want to assign to telephony devices connected to the FRITZ!Box. If you need additional fields, click 'Other Phone Numbers'.
  6. Enter the account information (for example username, password, registrar) in the corresponding fields. This information is supplied by your provider.
  7. If the 'Relay outgoing emergency calls without prefixes' option is displayed, ask your provider whether calls to emergency numbers must be made with or without prefixes. Select the correct setting.
  8. If the 'Relay special rate numbers without prefixes' option is displayed, ask your provider if calls to special rate numbers must be made with or without prefixes. Select the correct setting.
  9. If present, enable the 'Insert area code for outgoing calls' option. The area code is then automatically added when you make local calls over the internet, so you do not have to enter it.
  10. Click on 'Next' and follow the wizard's instructions.

Configuring an internet phone number (SIP trunk line)

If you ordered a SIP trunk line from your provider, configure it as follows:

  1. Click on 'Telephony' in the FRITZ!Box user interface.
  2. Click on 'Phone Numbers' in the 'Telephony' menu.
  3. Click on the 'New Phone Number' button.
  4. Select 'SIP DDI line' from the drop-down list.
  5. Enter the trunk number of your SIP trunk line.
  6. Enter the switchboard extension.
  7. Select the length of the longest internal extension number from the drop-down list.
  8. Enter all of the extension numbers (trunk number plus extension) you want to assign the telephony devices connected to the FRITZ!Box. If you need additional fields, click 'Other Phone Numbers'.
  9. Enter the account information (for example username, password, registrar) in the corresponding fields. This information is supplied by your provider.
  10. If the 'Relay outgoing emergency calls without prefixes' option is displayed, ask your provider whether calls to emergency numbers must be made with or without prefixes. Select the correct setting.
  11. If the 'Relay special rate numbers without prefixes' option is displayed, ask your provider if calls to special rate numbers must be made with or without prefixes. Select the correct setting.
  12. If present, enable the 'Insert area code for outgoing calls' option. The area code is then automatically added when you make local calls over the internet, so you do not have to enter it.
  13. Click on 'Next' and follow the wizard's instructions.

3 Adjusting the login information for 'Other provider'

If you selected 'Other provider' in the configuration wizard and the phone number does not get registered after setup, you may have to edit the login information. If you select a preconfigured internet telephony provider, the FRITZ!Box configures the correct settings automatically:

Using own phone number for registration

  1. Click on 'Telephony' in the FRITZ!Box user interface.
  2. Click on 'Phone Numbers' in the 'Telephony' menu.
  3. Click on the (Edit) button for the respective internet phone number.
  4. Enable or disable the 'Use phone number for registration' option. Whether you must enable the option depends on the provider. Try both settings or ask your provider. There is no standard name for this parameter. Its technical acronym is 'SIP URI'.
  5. Click on 'Apply' to save the settings.

Using REGISTER-fetch

  1. Click on 'Telephony' in the FRITZ!Box user interface.
  2. Click on 'Phone Numbers' in the 'Telephony' menu.
  3. Click on the (Edit) button for the respective internet phone number.
  4. Enable or disable the 'Provider does not support REGISTER-fetch' option. Whether you must enable the option depends on the provider. Try both settings or ask your provider.
  5. Click on 'Apply' to save the settings.

4 Enabling registration via an internet connection

Some internet service providers establish a second internet connection for internet telephony; this connection can only use the internet service provider's numbers. Therefore, enable the following option if you are using an internet phone number that is not from your internet service provider. The FRITZ!Box will then use the same connection you surf with for this phone number:

  1. Click on 'Telephony' in the FRITZ!Box user interface.
  2. Click on 'Phone Numbers' in the 'Telephony' menu.
  3. Click on the (Edit) button for the respective internet phone number.
  4. Enable the 'Always register via an internet connection' option.
  5. Click on 'Apply' to save the settings.

5 Entering the VLAN ID for internet telephony

The following step is only necessary if your internet telephony provider requires a VLAN ID for internet telephony:

  1. Click on 'Telephony' in the FRITZ!Box user interface.
  2. Click on 'Phone Numbers' in the 'Telephony' menu.
  3. Click on the 'Line Settings' tab.
  4. Click on 'Changing the Settings' in the 'Telephony connection' section.
  5. Click on 'Connection Settings for DSL/WAN'.
  6. Enable the 'VLAN required for internet telephony' option.
  7. Enter the parameters required by your internet telephony provider in the 'VLAN ID' and 'PBit' fields.
  8. Click on 'Apply' to save the settings.

6 Enabling internet telephony via the mobile network

The following step is only necessary if the FRITZ!Box is configured for internet access via the mobile network, and you also want to make internet calls when the FRITZ!Box establishes the internet connection over the mobile network:

ATTENTION!Some mobile network providers stipulate in their contracts that you cannot use your mobile internet connection for internet telephony. Ask your provider about the terms and conditions!

  1. Click on 'Internet' in the FRITZ!Box user interface.
  2. Click on 'Mobile Network' ('Mobile Communications') in the 'Internet' menu.
  3. Enable the option 'Use internet telephony via the mobile internet connection'.
  4. Click on 'Apply' to save the settings.



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