Yes. The OBi also works with Internet telephone service providers which can then be used to bridge services between OBi endpoints as well as accessed via the Internet telephone service provider's gateways so that the user can make a call 'in-and-out' of the OBi using this service. This capability is especially useful if say, you are in your car and you want to make an international call with your cell phone. Just call the number of the OBi provided by the Internet telephone service provider and then call out to the international number after the OBi Auto Attendant answers and prompts you for the destination number.