2 ms·Ah. They appear to be using the RS232 DCD line for that.by tyingq 5y agoAh. They appear to be using the RS232 DCD line for that.h2odragon 5y agoRI can trigger interruptsmbbrutman 5y agoThis particular machine was the victim of some cost cutting, so there is no RI line. Data Carrier Detect is available and it is usually used for this. (I got my wiring inspiration from other projects.)