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Techniques To Support VoIP Using WAP In A 2G And GPRS In 2.5G Networks Disclosure Number: IPCOM000007077D
Original Publication Date: 2002-Feb-22
Included in the Prior Art Database: 2002-Feb-22

Publishing Venue


Related People

Derek Oxley Nandakishore Anant Albal Douglas Andrew White Sidney Tang


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.