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Industry Telecom
Founded 2013; 5 years ago (2013)
Headquarters Munich and Naperville, Germany and United States
Area served
Key people
Pat DiPietro (CEO)
Homayoun Razavi (CCO)
Bala Ganesan (CFO)
Uwe Fischer (CTO)
Products Intelligent Network Management,Integrated Optical Planning Solutions,Packet Optical Transport Solutions, MSPP Solutions, Edge Routing Solutions, Cross-Connect/TDM Solutions, Optical LAN & Broadband Access
Revenue unknown
Number of employees
about 3000
Parent Marlin Equity Partners
Munich: Campus St. Martin St. - North Entrance
Munich: Campus St. Martin St. - South Entrance (Werinher St.91)

Coriant was formed as an independent company in 2013. The technology comes from - Siemens Optical Networks (NSN ON), Tellabs, and Sycamore Networks. Coriant has entered into a definitive agreement to be acquired by Infinera (Nasdaq: INFN), a provider of Intelligent Transport Networks and a recognized industry leader and innovator in vertical integration technologies, headquartered in Sunnyvale, CA. (July 23, 2018)

The launch of the company under the name Coriant was announced for the OFC/NFOEC in March 2013.[1] On May 6, 2013 Coriant became independent from Nokia Siemens Networks under the ownership of Marlin Equity Partners.[2]

Meanwhile, the expected merge with Sycamore (acquired by Marlin Equity in January 2013 and headquartered in Chelmsford, Massachusetts), which will operate as Coriant America Inc., was announced.[3]

Marlin Equity announced the plan to merge Coriant and Tellabs (acquired by Marlin Equity in December 2013 Naperville, Illinois), which will operate as Coriant.[4]


Coriant originates from the Transmission Technology department of Siemens based in Munich, Germany, (Übertragungstechnik - ÜT as it was called in the 1990s). In those days the technology evolved from Plesiochronous Digital Hierarchy (PDH) to Synchronous Digital Hierarchy (SDH) in the STM-4 / STM-16 (2.5 Gbit/s) level.

In the late 1990s and early 2000s DWDM emerged to allow for even higher transmission capacity (in the terabit per second region). This technology is also named optical transport network (OTN), where a set of multiplex and encapsulation hierarchies is standardized.


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