| 摘要 |
PURPOSE:To control a videotex terminal as two terminals, an up dedicated terminal and a down dedicated terminal, by using a computer, by forming a cable as a specific connection, and separating it to two cables. CONSTITUTION:A connector 13 is connected to the communication control equipment with asynchronization of 75bps of the computer, and a connector 14 is connected to the communication control equipment with F synchronization of 4800bps. Also, a connector 23 is connected to the modem of a video text center. Each terminal of the connector 14 and that of the connector 23 are connected as shown in figure. Interface control with the modem is performed by lines ER, DR, and CD, and the reception of up data is performed by the RD. An FG and an SG are the ground, and an RS and a CS are used by folding. Each terminal of the connector 14 and that of the connector 23 are connected as shown in figure, and the transmission of down data is performed by an SD. The delivery timing of transmission data is supplied from the modem by using an ST2. The FG and the SG are the ground. The ER and the DR, and the RS and the CS are used by folding.
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