Abstract: According to one aspect, a method includes obtaining, at a client included in a push-to-talk (PTT) system, a plurality of talk bursts including at least a first talk burst and a second talk burst, the first talk burst being associated with a first source included in the PTT system, the second talk burst being associated with a second source included in the PTT system, wherein the plurality of talk bursts are obtained at approximately a first time. The method also includes identifying the first source as a source of interest and determining, after identifying the first source as the source of interest, an identity of the first source. Finally, the method includes processing the first talk burst as having a priority over the second talk burst.

Abstract: According to one aspect, a method includes obtaining, at a client included in a push-to-talk (PTT) system, a plurality of talk bursts including at least a first talk burst and a second talk burst, the first talk burst being associated with a first source included in the PTT system, the second talk burst being associated with a second source included in the PTT system, wherein the plurality of talk bursts are obtained at approximately a first time. The method also includes identifying the first source as a source of interest and determining, after identifying the first source as the source of interest, an identity of the first source. Finally, the method includes processing the first talk burst as having a priority over the second talk burst.

Abstract: A method is provided that includes evaluating a message to be communicated to one or more persons and evaluating social network data that is indicative of a social network of the persons. The social network of the persons is used as a basis for communicating the message to one or more persons in the social network. In other embodiments, a selected one of the persons in the social network responds to receiving the message by sending the message to other persons in another social network to which the selected person belongs. In still other embodiments, the social network can be restricted to persons associated with a geographical area and the geographical area can be associated with a location from which the message originates. In yet other embodiments, communicating the message comprises making a telephone call or communicating the message comprises out-of-band signaling.