A technique is provided for an enterprise phone to provide professional services during a communication set up in a mobile network on a private cellular phone. The technique includes a first user agent coupled to a communication server of an enterprise communication network to represent the enterprise phone as a terminal of the enterprise communication network, a classical audio interface coupled to the first user agent, and a first wireless transmitter-receiver to communicate with a second wireless transmitter-receiver embedded in the private cellular phone. A second user agent, coupled to the first wireless transmitter-receiver and to the communication server, represents a private cellular phone as a virtual terminal of the enterprise communication network. The second user agent requests a set up of a second communication between itself and the first user agent so that a mobile communication already set up on the private cellular phone is connected to the enterprise phone.