Epic 880TM Specifications and Requirements
The most reliable USB interface is as a USB printing device. The Virtual COM driver is an added layer of code that allows legacy software to believe it is interacting with a serial port. Note that a limitation of serial communications port virtualization is that each version of windows is slightly different, and not all RS232 features are supported: only features such as receive, transmit and ready/busy are supported, while other features such as on hook, off hook, ring, and break are not supported.
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