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Introduction

To be clear, a FritzBox can easily act as a SIP registrar and thus integrate VoIP phones just like ISDN or analog phones used to. However, the range of functions of the FritzBox is unfortunately not comparable with that of a professional telephone system (PBX).


This article is based on a test on a FritzBox 7390. It was tested on a Telekom All-IP connection.

If you want to connect a new Fritzbox to a Snom phone and need help setting up the Internet access, you can find a small guide in this article.



Overview

The configuration of a Snom device on the FritzBox is relatively simple. First you have to create a new telephony device in the FritzBox - type is IP phone.

The user name and password are important here.

  • The user name should have at least 8 characters.
  • AVM changed the password rules. Now it has to be more safe. And it is no longer important how long it is, but i should have a combination of lower and upper case letters, numbers and special characters as usual. (Tested on a Fritzbox 7590 - FW Version 07.12)



    Older Entry from 2018: The password must have exactly 8 characters, no more and no less.)


You should only allow registration from the Internet if you really need it. This is not necessary for an IP phone behind the Fritz Box and should therefore remain deactivated for security reasons.



Step by step guide - FritzBox








  • The user name should have at least 8 characters.
  • AVM changed the password rules. Now it has to be more safe. And it is no longer important how long it is, but i should have a combination of lower and upper case letters, numbers and special characters as usual. (Tested on a Fritzbox 7590 - FW Version 07.12)


    Older Entry from 2018: The password must have exactly 8 characters, no more and no less.)
















Step by step guide - Snom C520 WiMi

With the setup of the Fritzbox, most of the setup is done. Now you only have to set up the C520 WiMi.


Enter Snom C520 WiMi - Webinterface
  • To access the device, enter the IP address of your C520 WiMi into your Internet browser (e.g. http://192.168.1.100). To find out the IP address of your C520 WiMi, press the configuration key (gear icon) → "Status" → "Network". Confirm each with the checkmark icon.

  • The default access data are:
    • user / user
    • admin / admin
  • Please note that you should change the admin password directly during the setup ATTENTION: Do not forget the password, otherwise you will not be able to access your configuration.


Under "System/User Preferences" you can set the web interface to French and Spanish in addition to English, and the telephone language to German.


Until you have configured a Sip identity / extension, the three lamps around the speaker in the center will flash continuously. As soon as the extension is registered correctly, the lamps turn off immediately.

Configure Snom Identity


You may be interested in the following article: Setting up a FritzBox for Internet usage (on a Example with german Telekom)