Abstract: Systems and methods for providing dispatch call features are provided. The dispatch call features include the ability to maintain multiple simultaneous dispatch calls and the ability to manage multiple dispatch stations. The maintenance of multiple simultaneous dispatch calls feature allows a dispatch station to place a current dispatch call on-hold to either initiate a new dispatch call or to accept an incoming dispatch call. The management of multiple dispatch stations feature allows a number of dispatch stations to be associated with one or more dispatch station identifiers. When a dispatch call is made to one of the dispatch station identifiers, all associated dispatch stations are paged. The first dispatch station to respond to the page is connected to the incoming dispatch call.

Abstract: When an ad hoc group call is initiated, or at a subsequent time but before the group call is terminated, a call originator may set a parameter to establish a time limit. The time limit is invoked when the call originator drops from the group call. The time limit may be set to zero time indicating that all participants will be disconnected and the group call will be terminated immediately upon exit of the call originator. The time limit may also be set to a predetermined amount of time, which indicates that the group call may remain up until the predetermined amount of time expires. If no parameter to establish a time limit is selected, the group call may remain indefinitely even after the originator exits the group call.

Abstract: A subscriber unit including an interface and a processor to transmit a first request to a wireless communication system by way of the interface to request a communication session in a first communication mode with one or more users; communicate with the one or more users by way of the interface in the communication session and in the first communication mode; transmit, while in the communication session, a second request to the wireless communication system by way of the interface to switch the first communication mode to a different second communication mode; and communicate with the one or more users by way of the interface in the communication session and in the second communication mode.

Abstract: A method and computer-readable medium for displaying group call status information and participant status information for a group call are provided. Users participating in a dispatch group session (call) are provided with details about the group itself (group status) and the users participating in the group (participant status). When changes are made to the group call, the group call status information and the participant status information may be updated and displayed in real time.

Abstract: A wireless communication system is disclosed comprising a call controller to establish a communication session in a first communication mode between two or more users; receive a request from at least one of the users to switch the first communication mode of the communication session to a second communication mode; and switch the first communication mode of the communication session to the second communication mode. The first and second communication mode may respectively comprise half-duplex and full-duplex modes, or vice-versa. Other disclosed embodiments relate to a call controller for to setup multiple communication mode sessions in a wireless communication system, and a subscriber unit able to request and accept a switch to a different communication mode in an ongoing communication session.