Provides control over whether a modem or a serial port is to be used.

This checkbox must be selected, and a remote phone number phone number provided if the driver attached to this port is to be a modem tag.

 If the Use Modem checkbox is not selected, the Phone Number field will be disabled.

Used to set the number of the serial port that is to be used.  The corresponding serial port number must be configured in the Ports dialog box of the Windows Control Panel. The value should match your port number and be between 1 and 4096.

If the Use Modem checkbox is selected, the Port Number text box will be disabled and the Phone Number box will be enabled.

When a modem is to be used, fill in this field with the phone number that the modem must call in order to reach the remote system.  Supply all the digits including area code, etc.  Do not include spaces.

 If the Use Modem checkbox is not selected, the Phone Number field will be disabled.

The Data Bits spin box enables you to select a number (either 7, or 8) indicating the number of data bits to use for each character. The 8 bit setting, matching the size of a byte, is used for almost all devices. The 7 bit setting might be needed for older devices that require ASCII values.

The Stop Bits field enables you to specify the number of stop bits for each data character. (In asynchronous communications, a stop bit is a bit that indicates that a byte has just been transmitted).

This field enables you to set the baud rate (bits per second) at which data should be transmitted.

The Parity section enables data quality verification based on one of the following parity formats. It must be set to match your device configuration.

•    No Parity When selected, the No Parity radio button indicates that you wish to suspend parity checking for this serial port, and a parity bit will not be transmitted. By default, the No Parity checkbox is selected.

•   Odd Parity When selected, the Odd Parity radio button indicates that you wish to use the odd parity mode of parity checking in which the number of mark bits (1's) in the data is counted, and the parity bit is asserted or unasserted to obtain an odd number of mark bits.

•   Even Parity When selected, the Even Parity radio button indicates that you wish to use the even parity mode of parity checking in which the number of mark bits in the data is counted, and the parity bit is asserted or unasserted to obtain an even number of mark bits.

•   Space Parity When selected, the Space Parity radio button indicates that you wish to use the mark parity mode of parity checking in which the parity bit is unasserted.

•   Mark Parity When selected, the Mark Parity radio button indicates that you wish to use the mark parity mode of parity checking in which the parity bit is asserted.

The Echo checkbox enables you to indicate whether or not the transmitted data should be echoed in the received data.

If the Echo checkbox is selected, the driver should expect that the transmitted data will be echoed in the received data.

If the Echo checkbox is not selected, the driver should not expect the transmitted data to be echoed in the received data.

By default, the Echo checkbox is not selected.

Check this box to select whether the driver should assert RTS (Request to Send) flow control while data is being transmitted.

RTS/CTS (Request to Send/Clear to Send) flow control is typically used with all high-speed modems, or modems that compress data.

The Key Up Delay property indicates the delay in seconds prior to data transmission. The Key Up Delay field is only enabled if the RTS Keying checkbox is selected.

The default value for the Key Up Delay property is 0.1 seconds.