C.31. Serial Port Modem Control Lines

Driver Name:

Serial Port Modem Control Lines

Supported RML Commands:

GPI Enable ['GE']
GPI Set ['GI']
GPO Set ['GO']

This driver enables GPIO via the modem control lines on an RS-232C serial device. The lines map as follows:

Table C.5. Modem Serial Lines GPI Signal Mapping

1Data Set Ready (DSR)
2Clear To Send (CTS)
3Carrier Detect (CI)
4Ring Indicator (RI)

Table C.6. Modem Serial Lines GPO Signal Mapping

1Data Terminal Ready (DTR)
2Ready To Send (RTS)