System and method for switching between phone services

Gateway device comprising:

• a first interface to a residential phone wiring, said first interface enabling the gateway device to be connected to a central office, said residential phone wiring comprising more than one plugging means for connecting at least one analog phone device,
• said central office being configured to provide a first voice service to said at least one analog phone device,
• a broadband interface for connecting the gateway device to the internet,
• an FXS module for providing a voice over IP service over said broadband interface to said at least one analog phone device when the first voice service is disabled,
• unbundling detection means for detecting the presence of the first voice service, for connecting the FXS module to the residential phone wiring when the first voice service is disabled, and for disconnecting the FXS module from the residential phone wiring when the first voice service is enabled, the presence of the first voice service being based on the detection of current and voltage on the first interface, and
• a management agent for informing a gateway management server when changing from the first voice service to the voice over IP service and vice versa, so that the same phone number can be used when using said first voice service or said voice over IP service;
• wherein the unbundling detection means is configured to measure the voltage of the line between an FXO module of said gateway and the central office when the first voice service is disabled and when said FXS module is disconnected from the residential phone wiring.