Success Story – Lumen Project Part 2

Success Story - Lumen - part 2


The investments needed for deployment of 300km of fiber in the Alps region

For this extraordinary project, a 144 FO was deployed – a cable with a capacity of 144 strands of optical fiber for the creation of our own infrastructure that allows us to extend CELESTE network.
To carry out this project, we have invested in stronger and more resistant equipment to cope with the weather and the peculiarities of this difficult region including frost and snow, as well as in more efficient fiber optic welders that allow deployment over long distances. In this second part, our team members share with you the insights of the extensive work behind this beautiful project.

Mohamed Charfeddine – Construction manager
Mohamed Charfeddine – Construction manager

“I was in charge of the construction part to create the link between Lyon and St-Julien-en-Genevois. I worked on the Grenoble section which represents the pulling of 130 km of fiber. We deployed our CELESTE fiber cable with 72 strands for our client Lumen and 72 strands for our own usage.”

Stéphane Brisset – Team leader for Major Works CELESTE Fibre

“We have deployed 144 optical fibers but have also created our own infrastructure allowing us to extend CELESTE network for the deployment of fiber in the future. We have construction managers, site managers with a drilling workshop which helped us to answer this demand for civil engineering. We have also invested in stronger, more resistant equipment to deal with this difficult region.”

Stéphane Brisset - Team leader for Major Works CELESTE Fibre
Cyril Cros - Director CELESTE Fibre
Cyril Cros – Director CELESTE Fibre

“Our picketing teams intervened on this project. Picketing consists of pulling a string in its infrastructures to validate the route to confirm if our fiber cable can go through. We had to invest in equipment, in welders that allow us to work on long distances.”

Mathieu Lebas – Team Leader Drilling Workshop

“ Exceptionally in Savoie, we pulled up to 5 pipes at once for our needs and those of our future customers. We created 10 km of drilling completely from HDPE connection to excavations ; on these 10 km only the CELESTE team intervened. For this project, we had to work at night in difficult weather conditions, snow, frost, we encountered a lot of traffic too. We made a specific markup for our safety and for the public. We had to adapt the drilling equipment such as carbide heads for usage on rocks.”


Discover our solutions

With more than 20 years of experience in the telecom market in France, CELESTE is an operator dedicated to companies. Our telecom solutions are specially designed to meet their professional  needs and accompany them in their digital transformation.


Your company is situated in the Alps region between Lyon and St-Julien-en-Genevois and you are looking for a fiber internet solution ? Read more about our fiber connection offer for companies or contact our team of experts to tell us more about your needs !

Know more

Like our client Lumen, your company have specific needs in dark fiber for its future usages ? Get in touch with our team ! Contact our Expert !

FR version of the article



CELESTE is a telecom operator for businesses in France, specialised in optical fiber and innovative and eco-friendly network solutions. Created in 2001, the company provides Internet Access, sites interconnexion and telephony services to SMEs, large firms as well as public institutions. The telecom operator serves more than 16 000 clients’ sites. CELESTE has ownership of its national network of more than 10 000 km of optical fiber deployed in France and provides data hosting and cloud solutions within its datacenters Marilyn and Fil d’Ariane. The telecom operator is also present in Switzerland through its subsidiary company VTX Telecom.

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