Patent ID: 7545798

Claim:
A communication apparatus having a function to execute a call controlling procedure for voice communications using a computer communication network with a communication partner apparatus by using a server connected with said computer communication network, comprising; a correspondence storage means configured to store corresponding relations between a communication address of said communication partner apparatus and selection information of said communication partner apparatus; and a call controller configured to receive said selection information of said communication partner apparatus from a call-initiate, and configured to request a communication connection with said communication partner apparatus using a communication address of said server, and configured to process a communication connection with said communication partner apparatus by using said server, wherein said call controller is configured to acquire from said server said communication connection demanded by said call-initiate, but if no response is obtained from said server, then if said selection information received from said call-initiate is stored in said correspondence storage means, said call controller is configured to obtain from said correspondence storage means a communication address of said communication partner apparatus corresponding to said selection information, and said call controller is configured to request a communication connection to said communication address of said communication partner apparatus using said communication address obtained from said correspondence storage means.