Mechanisms are provided for conference call communication in a virtual world environment. The mechanisms establish a hybrid conference call by establishing a hybrid conference call communication connection between a data based communication conference call server, that handles data based communications with client computing devices, and a telephone conference call server, that handles telephone protocol communications with telephone devices external to the virtual world environment. Communications between client computing devices and telephone devices are converted from data based communications to telephone protocol communications and vice versa using a data based communication conference call server and a telephone conference call server.