Alcatel Submarine Networks can trace its origins back to the British
Submarine Telegraph Company, founded in 1851 with the involvement of the engineer
Thomas Crampton, which in the same year laid the first
telegraph cable between England and France. The company went on to lay other cables connecting England and
Jersey to the continent until it was taken over by the
General Post Office in 1890. In 1925, the
''Compagnie Générale d'Électricité absorbed the Compagnie Générale des Cables de Lyon
. In 1991, Compagnie Générale d'Électricité
changed its name to Alcatel-Alsthom; subsequently, Compagnie Générale des Câbles de Lyon'' became Alcatel Câble and acquired
AEG Kabel in exchange for $586 million, In 1993, Alcatel Cable acquired the British company STC Submarine Systems (the successor company to the Submarine Telegraph Company) and its 34,000 m2 factory at
Enderby's Wharf on the
Greenwich Peninsula on the banks of the Thames, where submarine cables had been made since 1857. The company had latterly been a division of Northern Telecom Europe (which later became
Nortel). Alcatel Cable became the world's leading cable manufacturer, with around 40% of the global market for fibre-optic submarine telecommunications cables. At the time of the acquisition, its production capacity was roughly 30,000 km of
optical cable per year. In June 1994, Alcatel merged its submarine telecommunications activities into a new company called Alcatel Submarine Systems; this subsidiary was 51% owned by Alcatel Câble (which became
Nexans) while 49% was held by Alcatel-CIT. On 9 October 2000, Alcatel Cable became Nexans; Alcatel retained Alcatel Submarine Networks and 20% of Nexans (this stake in Nexans was resold in 2005). In 2000, Alcatel Submarine Networks and Louis Dreyfus Armatuers (LDA) formed a partnership called
ALDA Marine. This
joint venture focused on the building, owning and operation of a fleet of
cable ships to provide subsea telecommunication cable systems and marine operations in the global market. During 2003, Alcatel was part of the consortium to build the Sudan to South Africa undersea cable link called Eastern Africa Submarine System (EASSy). Following the completion of EASSy, Alcatel has remained involved in the operation of the cable as well as the expansion of its capacity. In June 2003, one of Alcatel Submarine Networks' vessels,
Heimdal, performed a record-breaking repair of submarine optical fiber in the
Pacific Ocean, on the route between Japan and the United States, at an extreme depth of almost 9,400 km. On 1 December 2006, Alcatel acquired
Lucent Technologies to form
Alcatel-Lucent; consequently, Alcatel Submarine Networks was rebranded as Alcatel-Lucent Submarine Networks. On 8 April 2009, Alcatel-Lucent Submarine Networks signed a supply contract with a telecoms
consortium for the construction and maintenance of the
West Africa Cable System (WACS), a cable linking South Africa and the United Kingdom via the Atlantic Ocean. On 15 July 2010, Alcatel-Lucent Submarine Networks began laying the WACS cable with the departure of
Île de Bréhat from the cable factory in
Calais, loaded with nearly 6,000 km of submarine cable. The cable was laid by
Île de Bréhat and its sister ship
Île de Sein, installation work officially ended on 19 April 2011 with the laying of the cable in
Yzerfontein and the cable was declared operational on 11 May 2012 when it was illuminated in South Africa. In mid 2011, Alcatel Submarine Networks made use of its cable ships in an unconventional manner when the CS
Ile de Sein contributed to the recovery of the
flight data recorder along with the bodies of numerous victims from
Air France Flight 447 in the Atlantic. This action proved that the company has the versatility to use the vessel to recover an object from the seabed for telecommunications or emergency assistance purposes. In October 2014, Alcatel-Lucent Submarine Networks acquired the Norwegian company Optoplan, which was formerly a division of the French oil group
CGG. In 2015, Alcatel-Lucent renewed their partnership with Louis Dreyfus Armateurs (LDA). Furthermore, Alcatel-Lucent took ownership of all seven ships in the fleet, which would be operated by LDA. On 15 April 2015, Alcatel-Lucent announced its acquisition by the Finnish telecoms giant
Nokia. While Alcatel-Lucent Submarine Networks would become part of Nokia's Submarine Network Solutions division in France, but was intended to remain operationally independent. In 2017, Alcatel-Lucent Submarine Networks reverted to its original name, Alcatel Submarine Networks. In October 2018, Nokia and the French telecoms provider Ekinops confirmed that they had been in discussions for several months about a possible takeover of Alcatel Submarine Networks; however, these discussions came to an end in April 2019. Around this time, the French government reportedly continued to seek a round of financing, that was speculated to potentially include
Orange Marine, in order to protect its strategic interests. In January 2021, ASN launched construction of the Africa-1 submarine cable to connect Africa, the Middle East, and Europe. That same year, ASN added two more cable ships to its fleet, ''CS Ile d'Yeu
and CS Ile de Molène
. Two years later, Nokia and ASN added another cable ship to the fleet, CS Ile d'Ouessant
; this vessel was purchased in 2019 and had been built in 2011 as the CS Toisa Warrior''. By 1 January 2022, ASN had laid more than 700,000 km of cable on the seabed, maintained more than 300,000 km of cable and commissioned more than 200 fibre optic systems. On 27 June 2024, the French government announced that it had reached an agreement with Nokia to buy 80% of ASN's shares through the ''
Agence des participations de l'État'' (APE). This decision meant that the 'strategic company' is once again controlled by a French shareholder, after the Finnish group had been considering the company's future for two years. The deal is valued at €100 million, drawn from the government's financial holdings special allocation account, whereas the total value of the company (including cash and debt) is €350 million. Nokia retains 20% of the capital, but the APE will be able to buy back this share, under conditions that have not been communicated. During March 2026, ASN announced that it would invest €100 million into the modernisation of its submarine cable factories in both Calais and Greenwich to enable the production of next-generation cables. == Fleet ==