GANC (Generic Access Network Controller)?

GANC forms a segment of the 3GPP Release 6 GAN. It gives the association among the mobile and the MSC / SGSN over the generic IP access network. GAN Controller (GANC) receives information from the Internet and transfers it into the telephone network as if it were coming from an antenna. Calls can be set from or received to the handset as if it were associated over-the-air straightforwardly to the GANC’s point of presence. It supports both the A and Gb interfaces towards the core network.