Modem Control Effect

When modem control is enabled for a port, the PortMaster interprets the data carrier detect (DCD) signal as follows according to the type of ports:
Login If carrier is not asserted, the port is unavailable. If carrier is asserted, the PortMaster initiates authentication and displays a login prompt.
Device If carrier is not asserted, the port is unavailable. If carrier is asserted, the port is available for the device service.
Twoway If carrier is not asserted, the port is available for device services. If carrier is asserted, the port attempts to establish a network connection and disable the device service.
Network Hardwired If carrier is not asserted, the port is unavailable. If carrier is asserted, the port attempts to establish a network connection.
Network Dialin If carrier is not asserted, the port is unavailable. If carrier is asserted, the PortMaster initiates authentication and displays a login prompt.
Network Dialout The assertion of carrier has no effect, but the transition of carrier from asserted to not asserted causes the port to be reset.
Network Twoway  If carrier is not asserted, the port is available for network dial-in. If carrier is asserted, the port attempts to establish a network connection and disable the network dial-in.