Patent ID: 6222829
Filing Date: 2001-04-24
Classification: H04L,H04M,H04W

Abstract:
An apparatus for effectuating voice communication with a mobile station, comprising:a gateway mobile services switching center capable of receiving an incoming voice call and also capable of determining if said mobile station is able to operate in a voice mode based on an information provided by a HLR and further capable of routing said voice call across a mobile radio network toward said mobile station by enabling circuit-switched communications with said mobile station on a traffic channel if said mobile station is able to operate in said voice mode; anda voice gateway, coupled to said gateway mobile services switching center, capable of routing said voice call across an Internet Protocol communication network and the mobile radio network toward said mobile station by enabling packet-switched communications with said mobile station on a packet channel if said information provided by said HLR indicates that said mobile station is not able to operate in said voice mode.