Internet protocol telephony for a mobile station on a packet data channel

A voice gateway for effectuating voice communication with a mobile station, is provided, which is capable of receiving an incoming voice call and capable of routing said voice call toward the mobile station by enabling packet-switched communications with the mobile station on a packet channel if the mobile station is not able to operate in a voice mode. A related method comprises the steps of determining if said mobile station is capable of operation in a voice mode, mapping an identity of the mobile station to an Internet Protocol address of the mobile station and routing said incoming voice call to said mobile station by enabling packet-switched communications with said mobile station on a packet data channel of said mobile radio network, if said mobile station is not capable of operation in a voice mode. Furthermore, a corresponding system is provided.