| 摘要 |
PURPOSE:To reduce the delay of data repeating and to reduce the cost of a cable and a data transmitting/receiving circuit, by accumulating data and adding a synchronization maintaining sequence in accordance with the phase difference between a synchronizing signal in receiving data and that in an MODEM. CONSTITUTION:The phase difference between a synchronizing signal extracted 44 from data received from a terminal device 3 and the synchronizing signal of the MODEM2 is detected, and when the number of synchronizing signals extracted from the data received from the terminal device 3 is larger than that of MODEM synchronizing signals, the data which can not be transmitted to the MODEM2 is stored in a bit buffer 48 of a repeating device 4 until the terminal device 3 sends an end character for a transmission massage. If the number of synchronizing signals of the MODEM2 is larger than the number of synchronizing signals extracted from the data received from the terminal device 3, the terminal device 3 sends a synchronization maintaining sequence, then the repeating device 4 adds a synchronization maintaining sequence moreover. |
