Patent ID: 7463881

Claim:
A mobile station capable of converting a voice call from one of an emulated dispatch mode voice call or an interconnect mode voice call to the other mode voice call, the mobile station comprising: an in-band signaling tone detector that receives an in-band signaling tone corresponding to a request to switch over to the other mode voice call, converts the received in-band signaling tone to a corresponding value, and routes the first value to a processor; a memory that stores values corresponding to in-band signaling tones and programs associated with interpreting the values; a processor coupled to the in-band signaling tone detector and to the memory that receives the value from the in-band signaling tone detector, determines, based on the value and by reference to the memory, that the value corresponds to a request to switch over to the other mode voice call, and determines whether to switch to the other mode voice call based on the received request.