Compatibility between a telephone service with server and a calling line identification service

Abstract

A telephone service using a server designated by a telephone number and connected to a telephone network is made compatible with the telephone network and a calling line identification presentation service. The server joins a first call between a calling user terminal and the server to a second call between the server and a called user terminal. A user of the called terminal has previously subscribed to the calling line identification presentation service. Compatibility is achieved by transmitting the telephone number of the calling terminal in a request to set up the first call between the calling user terminal and the server through the telephone network. The request succeeds a call from the called terminal to the server. During the call from the called terminal to the server, the server stored in memory the telephone number of the called terminal as the terminal that most recently called the calling terminal. A telephone number of the server is replaced in a request to set up the second call with the stored telephone number of the calling terminal in response to the request to set up the first call in the server. The request to set up the second call is transmitted with the telephone number of the calling terminal from the server to the telephone network so that the telephone number of the calling terminal is transmitted from the telephone network to the called terminal.