The origin of XM Satellite Radio was a Petition for Rulemaking filed at the Federal Communications Commission (FCC) by regulatory attorney and Founder of Satellite CD Radio Martine Rothblatt, to establish frequencies and licensing rules for the world's first-ever Satellite Digital Audio Radio Service (SDARS). On 18 May 1990, Satellite CD Radio, Inc. (SCDR) filed a Petition for Rule Making in which it requested spectrum to offer Compact Disc quality digital audio radio service to be delivered by satellites and complementary radio transmitters. Following the Allocation NPRM, the FCC established a 15 December 1992 cut-off date for applications proposing satellite DARS to be considered in conjunction with CD Radio's application. One such application came from American Mobile Radio Corporation (AMRC), the predecessor company to XM Satellite Radio. XM Satellite Radio was founded by Lon Levin and Gary Parsons. It has its origins in the 1988 formation of the American Mobile Satellite Corporation (AMSC), a consortium of several organizations originally dedicated to satellite broadcasting of telephone, fax, and data signals. In 1992, AMSC established a unit called the American Mobile Radio Corporation, dedicated to developing a satellite-based digital radio service; this was spun off as XM Satellite Radio Holdings, Inc. in 1998. Its planned financing was complete by July 2000, at which point XM had raised US$1.26 billion and secured installation agreements with General Motors, Honda, and Toyota. Initially scheduled for September 12, 2001, XM's service start date was postponed due to the 11 September 2001 terrorist attacks on the World Trade Center and The Pentagon. XM Satellite Radio's first broadcast was on 25 September 2001, nearly four months before Sirius.