Techniques To Support VoIP Using WAP In A 2G And GPRS In 2.5G Networks
Original Publication Date: 2002-Feb-22
Included in the Prior Art Database: 2002-Feb-22
The invention describes techniques that provide 3G Voice Over Internet Protocol (VoIP) capabilities to users with WAP phones in 2G networks and GPRS phones in 2.5 G networks. The technique involves extending the VoIP bearer stream across the Public Switched Telephone network (PSTN) to provide an extension into the 2G/2.5G networks using the Circuit Switched Domain, while using the WAP and GPRS transports for Session Initiation Protocol (SIP) signaling.