Nortel Networks Corporation, once a global telecommunications titan, was a multinational leader in designing and manufacturing networking infrastructure and services. Headquartered in Mississauga, Ontario, Canada, Nortel provided cutting-edge solutions for telecommunications carriers and enterprises, spanning voice, data, and wireless communications. At its zenith in the late 1990s, the company employed over 90,000 people worldwide, operated in 150 countries, and boasted a market capitalization of approximately $300 billion, ranking among Canada’s most valuable corporations.

History
Founded in 1895 as Northern Electric and Manufacturing Company, a spin-off from Bell Canada, Nortel evolved from producing telephone equipment to pioneering digital technology. Renamed Northern Telecom in 1976, it launched the DMS-100 digital switch in 1979, revolutionizing telecom networks. The 1990s marked rapid expansion as internet demand surged. Rebranded Nortel Networks in 1998 after acquiring Bay Networks, the company became synonymous with optical and wireless innovation, fueling the dot-com boom.

Innovations
Nortel was a trailblazer in fiber-optic systems, wireless technologies (3G/4G), VoIP, and internet protocol networks. Its portfolio included routers, switches, and optical transport systems that underpinned global telecom infrastructure. Nortel held over 6,000 patents, many foundational to modern connectivity, including advancements in LTE and Ethernet.

Challenges
The early 2000s brought turmoil. The dot-com crash eroded demand, while a 2004 accounting scandal revealed $3billioninfinancialmisstatements,triggeringlawsuitsandexecutiveturnover\mathrm{.}Despiterestructuring,the2008financialcrisisexacerbateddebtwoes,leadingtoalandmarkChapter11bankruptcyfilinginJanuary2009.Nortel\text{’}sassetsweresoldtorivalslikeAvaya,Ciena,Ericsson,andMicrosoft,netting$3billioninfinancialmisstatements,triggeringlawsuitsandexecutiveturnover. Despiterestructuring,the2008financialcrisisexacerbateddebtwoes,leadingtoalandmarkChapter11bankruptcyfilinginJanuary2009.Nortel’sassetsweresoldtorivalslikeAvaya, Ciena, Ericsson,andMicrosoft,netting7.3 billion.

Legacy
Nortel’s bankruptcy, Canada’s largest, remains a cautionary tale of corporate governance risks. Yet its technological legacy endures: its innovations laid groundwork for today’s high-speed networks. In 2011, a consortium including Apple and Microsoft paid $4.5 billion for its patent trove, underscoring Nortel’s enduring influence. Though defunct, Nortel’s contributions continue to shape global telecommunications.