IBM 3741 Operator's Manual page 173

Data station

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Two-Way Communications

As shown below, you can transmit and receive data from the

3741 to a central computer system. You can perform two-

way communications in Transmit Receive (B). Expanded

Communications Transmit Receive (K), Transmit Transparent/

Receive (R), and Inquiry

modes. (Refer to the Communica-

tions Procedure in this section for a flowchart step-by-step

illustration.)

Central Computer