| 摘要 |
PURPOSE:To obtain an inexpensive ring type information transmitter with high isochromism by phase-locking a low speed transmission frame to a high speed transmission frame and adopting the high transmission speed as a natural number of multiple of the low speed. CONSTITUTION:A high speed transmission frame signal subject to multiplex in the unit of slots on a high speed signal transmission line 2 is inputted to a high speed signal multiple unit 20. The unit 20 applies S/P conversion to a high speed serial signal or P/S conversion to a parallel signal and transmits the converted result to a high speed bus 4 and stores it to an information exchange memory 40. The information in the memory 40 is subject to phase synchronization with the bus 4 and outputted to a low speed bus 5 whose speed is a half of the multiplex speed. A synchronizing unit 60 matches the phase locking between a high speed frame timing representing a high speed transmission frame and a low speed frame timing, moves the information on the bus 5 to the low speed transmission frame and inputs the result to a low speed signal multiplex unit 30. The unit 30 applies P/S or S/P conversion to the signal and transmits the result to a transfer signal transmission line 3. Similarly, the low speed transmission frame is transferred to the high speed transmission frame in the opposite route. |
