| 摘要 |
PURPOSE:To enhance both the CPU process efficiency and the circuit using efficiency by using properly both the semidouble and fully double systems via the control of CPU. CONSTITUTION:The semidouble communication circuit is formed with CPU5 of station A and CPU5' of station B via exchange 1 and circuit C1, and then shifted to the fully double communication by the request of station A. In this case, CPU5 is connected to CPU5' via circuit C2, the control data is sent to CPU5' via circuit C1 turn circuit C1 to exclusive use for reception respectively with the indication of CPU5, and MODEM 4a and 4b are fixed to the transmission and reception made each. At station B, the control data is detected through CPU5' MODEM 4a' and 4b' are fixed to the reception and transmission modes respectively, and the confirmation data for shift end is sent to CPU5 for a fixed time. In such way, the fully double communication becomes possible. |
