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Line 8: The approach of adding Virtual CD-ROM with software drivers on 3G or storage devices has two problems: it presumably raises the cost of the device, and it may ship outdated software or even viruses. Most of the times, up-to-date drivers are anyway built into the operating systems (after all, on systems implementing the USB standard like Linux, any 3G device is a USB serial port, and any storage device is a ... USB storage device). Virtual CD-ROM on U3-compatible devices can be removed by a software tool.<ref>{{cite web\|url=http://u3-tool.sourceforge.net/\|title=u3_tool - Tool for controlling U3 drives\|access-date=2021-01-04\|website=[[SourceForge]]}}</ref> Some 3G devices such as the Huawei support complete disabling of the Virtual CD-ROM.<ref>{{cite web\|url=http://www.techytalk.info/disable-virtual-cd-rom-drive-with-built-in-software-on-huawei-and-zte-gsm-modem-devices/\|last=Martinović\|first=Marko\|title=Disable virtual CD-ROM drive with built in software on Huawei and ZTE GSM modem devices\|website=TechyTalk.info\|access-date=2021-01-04}}</ref> Available software utilities include the following: ~~==ZeroCD==~~ When a device uses the ZeroCD method means that it behaves as a USB CD-ROM when first connected, with a virtual CD-ROM inserted with the Windows device drivers and related Cosmote control program. Once the Windows device drivers are installed, a special USB command is sent to the device to “switch” it to modem mode.<ref>{{cite web\|title=ZTE MF636 (Cosmote 3G USB Modem in Greece) & Linux\|date=5 November 2009\|access-date=2019-02-10\|url=http://stoilis.wordpress.com/2009/05/11/zte-mf636-cosmote-3g-usb-modem-in-greece-linux/\|archive-url=https://web.archive.org/web/20100109115532/http://stoilis.wordpress.com/2009/05/11/zte-mf636-cosmote-3g-usb-modem-in-greece-linux/\|archive-date=2010-01-09}}</ref>▼ ▲* ZeroCD: When a device uses the ZeroCD method means that it behaves as a USB CD-ROM when first connected, with a virtual CD-ROM inserted with the Windows device drivers and related Cosmote control program. Once the Windows device drivers are installed, a special USB command is sent to the device to “switch” it to modem mode.<ref>{{cite web\|title=ZTE MF636 (Cosmote 3G USB Modem in Greece) & Linux\|date=5 November 2009\|access-date=2019-02-10\|url=http://stoilis.wordpress.com/2009/05/11/zte-mf636-cosmote-3g-usb-modem-in-greece-linux/\|archive-url=https://web.archive.org/web/20100109115532/http://stoilis.wordpress.com/2009/05/11/zte-mf636-cosmote-3g-usb-modem-in-greece-linux/\|archive-date=2010-01-09}}</ref> ~~==Ozerocdoff==~~ * Ozerocdoff: It temporarily disables ZeroCD for USB Option WWAN modem. The new USB Option WWAN modem devices support a CD-ROM device, which holds the needed Windows device driver to use the WWAN modem. Therefore, the firmware of the WWAN modem announces during the USB enumeration process to work as a virtual CD-ROM device with its vendor name "ZOPTION". This device is now called ZERO-CD. Ozerocdoff is a solution to switch off the ZERO-CD and allow the modem to be a used as a modem.<ref>[http://packages.debian.org/sid/ozerocdoff Debian package ozerocdoff in sid]</ref> * USB_ModeSwitch: It is a virtual CD-ROM switching utility. From version 1.0.3 upwards there is a simple framework for integrating the switching with [[udev]] (the device manager) to make it fully automatic.<ref name="usb_modeswitch"/>▼ Therefore, the firmware of the WWAN modem announces during the USB enumeration process to work as a virtual CD-ROM device with its vendor name "ZOPTION". This device is now called ZERO-CD. Ozerocdoff is a solution to switch off the ZERO-CD and allow the modem to be a used as a modem.<ref>[http://packages.debian.org/sid/ozerocdoff Debian package ozerocdoff in sid]</ref> * Switch2modem: It is designed{{by whom\|date=May 2015}} for switching a 3G USB modem. The program works under [[OpenSolaris]].<ref>▼ ~~==USB_ModeSwitch==~~ ▲USB_ModeSwitch is a virtual CD-ROM switching utility. From version 1.0.3 upwards there is a simple framework for integrating the switching with [[udev]] (the device manager) to make it fully automatic.<ref name="usb_modeswitch"/> ~~==Switch2modem==~~ ▲Switch2modem is designed{{by whom\|date=May 2015}} for switching a 3G USB modem. The program works under [[OpenSolaris]].<ref> [http://blog.linux.gen.nz/2009/01/getting-the-telecom-t-stick-working-under-opensolaris/ Getting the Telecom T-Stick working under OpenSolaris] {{webarchive \|url=https://web.archive.org/web/20100602152424/http://blog.linux.gen.nz/2009/01/getting-the-telecom-t-stick-working-under-opensolaris/ \|date=June 2, 2010 }}</ref> * Fetch utility: huaweiAktBbo.c is a utility that can be [[Compiler\|compiled]] and re-creates the USB communication which is used in Windows.<ref>[http://www.nslu2-linux.org/wiki/HowTo/AddUsb3gModem NSLU2-Linux - HowTo / AddUsb3gModem browse]</ref>▼ ~~==Fetch utility==~~ ▲huaweiAktBbo.c is a utility that can be [[Compiler\|compiled]] and re-creates the USB communication which is used in Windows.<ref>[http://www.nslu2-linux.org/wiki/HowTo/AddUsb3gModem NSLU2-Linux - HowTo / AddUsb3gModem browse]</ref> == External links ==

Virtual CD-ROM switching utility: Difference between revisions