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{{Short description|Programs to disable the virtual CD-ROM drive}}
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{{self-published|date=August 2024}}
{{Expert needed|technology|reason=Very little found on this topic, not finding any good sources.|date=August 2024}}
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'''Virtual CD-ROM switching utilities''' are programs to disable the virtual [[CD-ROM]] drive found on some devices like [[mobile broadband modem]].<ref>{{Cite web |url=http://www.pharscape.org/usb_modeswitch.html |title=USB_modeswitch Virtual CD-ROM switching utility |access-date=2010-11-03 |archive-url=https://web.archive.org/web/20100212225215/http://www.pharscape.org/usb_modeswitch.html |archive-date=2010-02-12 |url-status=dead }}</ref>{{failed verification|date=August 2024}}{{Unreliable source|1=|certain=y|date=August 2024}} A virtual CD-ROM switching utility is a mode switching tool for controlling "flip flop" (multiple device) [[Universal Serial Bus|USB]] gear. Several USB devices (especially high-speed wireless [[Wide area network|WAN]] equipment offer a feature where they have their [[Microsoft Windows]] device drivers onboard; when plugged in for the first time they act like a [[USB flash drive]] and start installing the device driver from there. All succeeding insertions of the device switches the mode internally, resulting in the virtual CD-ROM drive or [[USB mass storage device class]] disappearing and being replaced with the actual device itself. The [[Wireless WAN]] (WWAN) gear maker [[Option N.V.|Option]] calls that feature "ZeroCD (TM)". With USB sniffing programs and [[libusb]] it is possible to eavesdrop the communication of the Windows device driver and isolate the [[Command (computing)|command]] or action that does the switching and to reproduce the same event under an unsupported environment like [[Linux distribution|Linux]] or [[BSD]] variants.<ref name="usb_modeswitch">{{Cite web|url=http://www.draisberghof.de/usb_modeswitch/|title=USB_ModeSwitch - Activating Switchable USB Devices on Linux}}</ref>{{failed verification|date=August 2024}}{{Unreliable source|1=|certain=y|date=August 2024}}
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