The PH-PC36 (MUX) circuit card is an interface card for mounting line circuits and/or trunks. Between the CPR and the Port Microprocessor (PM) of the line/trunk circuit, this circuit card provides an interface for PM control and management by the CPU. Likewise between the TSW and the line circuit/trunks, this circuit card provides an interface for multiplexing/de-multiplexing of voice Pulse Code Modulation (PCM) information and digital data information. |