Epic 880TM Specifications and Requirements
100-88002 Rev B Page 21
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.