Specifies the current state of the Data Carrier Detect (DCD) input signal. This is often used by modems to indicate the detection of a carrier (modem) on the phone line. This signal is also known as Receive Line Signal Detect (RLSD). This property is read only except when the Wire Mode property is set to RS232/DCE, or RS232/Auto with the hardware currently in the DCE state.

Remarks

The following table lists the characteristics of this property.

Short Name DCD State
Data type ci16.png
Permissions Read/Write
Available in Run-Time Engine Yes
Available in Real-Time Operating System Yes
Unknown -1
Unasserted 0
Asserted 1