There are three models of Internet-Box (light, standard and plus). The platform has only been tested on the Internet-Box plus but the others should work as well because they have the same web interface.
To use an Internet-Box router in your installation, add the following to your
# Example configuration.yaml entry device_tracker: platform: swisscom host: "192.168.1.1" # only required if not 192.168.1.1
See the device tracker component page for instructions how to configure the people to be tracked.