| 摘要 |
PURPOSE:To prevent the malfunction of a terminal equipment due to the frequency shift of the internal clock of the terminal equipment, by changing the frequency of the timing clock of a main operation panel. CONSTITUTION:When an abnormal terminal equipment is detected, a logical operation part 15 stores the peculiar address of this abnormal terminal equipment in an abnormal terminal equipment stoeage part 40 and changes hereafter the frequency of a timing clock CK just before transmission data to this abnormal termina equipment is inputted to a transmission signal generating part 14. That, is when the transmission signal is transmitted to the abnormal terminal equipment, a signal which rewrites clock set data held in a latch 42 is outputted from the logical operation part 15 to change the oscillation frequency of a voltage control oscillator 44, namely, the frequency of the timing clock CK. This changing operation for the frequency of the timing clock CK is repeated until the return signal from the abnormal terminal equipment is received. |
