Wincor Nixdorf TH420, Руководство пользователя

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Up to 127 devices: One host can support up to 127 devices with the use
of hubs.
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“Free ports”: Wincor Nixdorf BEETLE systems and the most PC
architecture machines contain two USB ports in the base hardware.
These advantages have become attractive to the POS industry for a couple
of reasons.
Ad di tio nal POS de vi ces
Some POS systems are required to host more peripherals than can be
supported by four RS-232C ports typical in a BEETLE platform. With the
addition of one (or two) USB connectors, the BEETLE platform can now
support the additional devices that had previously required a serial port
expander card.
Hig her band widths
New devices coming into use have bandwidth requirements that are higher
than the bandwidth that can be supported on Application Compatible
Escape Commands interfaces. These devices include image scanners and
printers. As the speed and capability of POS printers increases, the
performance of the printer in an application can become limited by the
speed of the communications interface.
USB provides ample bandwidth to support current and future POS printer
requirements.
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ABOUT THE UNIVERSAL SERIAL BUS