Configuration fritzbox

For the configuration of your fritzbox please follow the instructions below

    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. Enable the option Internet telephone number and click Next.
    5. If there is a drop-down list to select an Internet telephony provider from, select your provider. If your provider is not included in the list, select Other provider. Note: Whether the drop-down list is available and which providers are displayed depends on the regional options configured in the FRITZ!Box.
    6. Please enter the following Internet number (telephone number) and the account information (for example user name, password, registrar) in the corresponding fields. Internet Number:0041715880207 User: 41715880 Password: see above Registrar: STUN-Server:
    7. If present, you can enable the option Insert area code for outgoing calls. The area code is then automatically added when you make a call to a number that does not begin with “0”, so you do not have to dial it.
    8. Click Next and follow the Wizard’s instructions.

Please find more information here.