A system and a method are disclosed for a presence engine and a method of operating a presence engine for encoding or decoding availability status into a signal representative of an audio signal. The presence engine is configured to manage availability status of a user. The presence engine comprises an input configured to receive a signal representative of an audio signal and an output configured to send a signal representative of an audio signal. The presence engine also comprises a processor configured to encode availability status of a user into a signal representative of an audio signal and/or configured to decode availability status of a user from a signal representative of an audio signal.

 
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