Abstract: In a communication system network that comprises a plurality of communication systems and a processing multiplexer, the processing multiplexer comprises a processing module, a buffer module, a multiplexer module, and a buffer address module. The buffer module temporarily stores processed audio information, which is produced by the processing module, in one of several sections. The processed audio information is stored in section of the buffer module based on which signal destination it is for. If the processed audio information is destined for a signal destination that is assigned to a slot in the first distination interface bus, the processed audio information is stored in the first buffer location. When the processed audio information is placed onto the destination interface buses, it done so in a round robin fashion such that the communication system may operate in a real time frame.