| 摘要 |
PURPOSE:To reduce the effect of noise given onto an exchange by using a digital MFC signal register sender for MFC signal transmission/reception so as to reduce the mount space of an exchange. CONSTITUTION:Time division switches TDSWA and TDSWB of two exchanges are provided respectively with digital MFC signal register senders MFCSND0, MFCRCV0, MFCSND1, MFCRCV1 as multi-frequency signal transmission/ reception sender registers. The registers MFCSND1, 2 consist of ROMs, and digital number information or the like is stored in the ROM corresponding to multifrequency. Digital number information or the like is read by the channel designation from a CPU. The MFCRCV0, 1 consist of digital signal processors DSP or the like and identify a corresponding multi-frequency when the digital number information is sent. Through the constitution above, a caller subscriber STN-A and incoming subscriber STN-B are connected. The digital MFC signal register sender is compact and low in the cost and immune to external noise.
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