Nortel Networks Corporation, formerly known as Northern Telecom Limited and sometimes known simply as Nortel, was a multinational telecommunications equipment manufacturer headquartered in Mississauga, Ontario, Canada. On January 14, 2009, Nortel filed for protection from its creditors in the United States, Canada, and the United Kingdom, in order to restructure its debt and financial obligations. In June 2009, the company announced it would cease operations and sell off all of its business units. The period of bankruptcy protection was extended to October 31, 2012. As part of the bankruptcy proceedings, Nortel Networks Inc. publishes monthly operating reports outlining cash receipts and disbursements. Alexander Graham Bell conceived the technical aspects of the telephone and invented it in July 1874, while residing with his parents at their farm in Tutelo Heights, on the outskirts of Brantford, Ontario.