BlackBerry Limited
Establishing a voice call

Abstract:

A user equipment (UE), which is able to use a plurality of different wireless access technologies, receives a request to establish a voice call. The UE determines whether voice over a first wireless access technology of the different wireless access technologies is supported, and responsive to determining that voice over the first wireless access technology is not supported, the UE attempts to establish the voice call over a second wireless access technology of the different wireless access technologies.