Does DirectSOFT support USB converters that work, not as COM devices, but rather show up as an Ethernet device?
No. The type of USBs that DirectSOFT supports are those that show up as COM devices. Ethernet-to-USB will not work because in order to talk to Ethernet, DirectSOFT assumes that you have an ECOM. Thus if you make an Ethernet link, DirectSOFT wants to talk to an ECOM not a serial device. Thus when the Ethernet-to-USB converter converts the Ethernet signals to USB, then the serial device will not understand the ECOM protocol. See DirectSOFT FAQ0011 for compatible USBs.