Patent ID: 8868136

Claim:
Apparatus comprising at least one processor and at least one memory, the at least one memory having stored therein computer-readable instructions which, when executed by the at least one processor, cause the at least one processor: to detect the presence of at least one identifier in an audio data portion received from a microphone, the audio data portion being a portion of an audio data stream, the at least one identifier indicating that a voice call is required to be initiated and indicating a remote device to which the voice call is required; to identify a device identifier associated with the remote device based on the at least one identifier; and to cause an audio data item and a voice communication request to be transmitted to the remote device based on the device identifier, the audio data item being used by the remote device to alert a user of the remote device to the presence of the incoming voice communication request, wherein the audio data item includes at least part of the audio data portion and wherein the at least part of the audio data portion includes the at least one identifier which indicates that the voice call is required to be initiated and which indicates the remote device to which the voice call is required.