A gateway is provided for interfacing packet-based phone services with controllers of emergency call centers. For each type of electronic medium to be interfaced, the gateway comprises a specific I/O interface and a specific module such as a protocol stack. The gateway also comprises an auxiliary information gateway application that integrates the I/O interfaces and modules into a logical framework that enables inter-working therebetween. A controller that includes the functionality of the gateway device is also provided. Methods for enabling emergency calls, and more generally for enabling a multi-media session, are also provided.