2009 to United States consumers via existing white space in unused television frequencies between 54 MHz and 698 MHz (TV Channels 2-51). The coalition expected speeds of 80 Mbit/s and above, and 400 to 800 Mbit/s for white space short-range networking. The group included Microsoft, Google, Dell, HP, Intel, Philips, Earthlink, and Samsung Electro-Mechanics. Many of the companies involved in the White Spaces Coalition were also involved in the Wireless Innovation Alliance. Another group calling itself the White Space Alliance was formed in 2011. Google sponsored a campaign named Free the Airwaves with the purpose of switching over the white spaces that were cleared up in 2009 by the DTV conversion process by the FCC and converted to an un-licensed spectrum that can be used by Wi-Fi-like devices. The National Association of Broadcasters disapproved of the project because they claimed it would reduce the broadcast quality of their TV signals. Preliminary test The Federal Communications Commission's Office of Engineering and Technology released a report dated July 31, 2007 with results from its investigation of two preliminary devices submitted. The report concluded that the devices did not reliably sense the presence of television transmissions or other incumbent users, hence are not acceptable for use in their current state and no further testing was deemed necessary. However, on August 13, 2007, Microsoft filed a document with the FCC in which it described a meeting that its engineers had with FCC engineers from the Office of Engineering and Technology on August 9 and 10. At this meeting the Microsoft engineers showed results from their testing done with identical prototype devices and using identical testing methods that "detected DTV signals at a threshold of -114 dBm in laboratory bench testing with 100 percent accuracy, performing exactly as expected." In the presence of FCC engineers, the Microsoft engineers took apart the device that the FCC had tested to find the cause of the poor performance. They found that "the scanner in the device had been damaged and operated at a severely degraded level" which explained the FCC unit's inability to detect when channels were occupied. It was also pointed out that the FCC was in possession of an identical backup prototype that was in perfect operating condition that they had not tested. FCC decision TV broadcasters and other incumbent users of this spectrum (both licensed and unlicensed, including makers of wireless audio systems) feared that