Advanced-Settings-for-COM-Port-Dialog-Box

Advanced Settings for COM Port Dialog Box

Advanced Settings for COM Port Dialog Box

Specifies additional hardware handshaking settings for serial ports.

List of Options

The following options are displayed.

CTS

Enables Clear To Send handshaking. This monitors pin 5 of a 25-pin serial port or
pin 8 of a 9-pin serial port. CTS is an input bit, monitored for an output from the
plotter or printer.

DSR

Enables Data Set Ready handshaking. This monitors pin 6 of a 25-pin serial port, or
pin 6 of a 9-pin serial port. DSR is an input bit, monitored for an output from the
printer or plotter.

RLSD

Enables Received Line Signal Detector handshaking. This is sometimes called DCD or
Data Carrier Detect. It is an input pin that can be monitored for an output from the
plotter. It is on pin 8 of a 25-pin serial port and on pin 1 of a 9-pin serial port.

RTS

Controls the Request To Send output bit. This sends a signal to the printer or plotter
on pin 4 of a 25-pin serial port or on pin 7 of a 9-pin serial port.

Disabled

Disables the RTS line when the device is opened.

Enabled

Enables the RTS line when the device is opened.

Handshake

Enables RTS handshaking. The driver raises the RTS line when the input buffer is less
than one-half full and lowers the RTS line when the buffer is more than three-quarters
full.

Toggle

Specifies that the RTS line is high if bytes are available for transmission. After
all buffered bytes have been sent, the RTS line is low.

DTR

Controls the Data Terminal Ready output pin. This sends a signal to the printer or
plotter on pin 20 of a 25-pin serial port or on pin 4 of a 9-pin serial port.

Disabled

Disables the DTR line when the device is opened.

Enabled

Enables the DTR line when the device is opened.

Handshake

Enables DTR handshaking.

Learning AutoCad

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