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Customer Stories

Departmental Council Seine-Saint-Denis

Modernizes its telephony and reduces operating costs

FranceGovernment

About the customer

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The Departmental Council of Seine-Saint-Denis, with nearly 7,000 employees, is a major public employer in the Île-de-France region. Its missions cover a wide range of public services: social assistance, culture, leisure, road maintenance, transport, and education.

Solutions used

  • Digital Age Communications
At the time, the annual allocation for middle schools was around 800,000 euros. We brought it down to 150,000 euros. That represents a very, very significant economic gain for the Department.
Thierry Caucheteur, Head of the Infrastructure Engineering Department

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Challenges

In 2007, the Department faced an aging and highly heterogeneous telephone infrastructure. A central system managed around 3,000 employees, while the remaining 4,000 were distributed across local PBXs, one per site. This setup led to:

  • Significant hardware obsolescence
  • Complex management of technical skills
  • High maintenance costs
  • Limited flexibility to adapt to evolving needs

Action

A master plan was developed to modernize the entire telephony system. After approval by General Management and the launch of a public procurement process, the OmniPCX Enterprise solution from Alcatel-Lucent Enterprise was selected. The project was entrusted to Hexatel, a systems integrator recognized for its expertise in ToIP migration.

The deployment spanned approximately ten years, with a gradual migration plan covering several hundred sites. In 2016, the scope expanded to include 130 middle schools, bringing the total number of sites to over 400.

Results

Technical Benefits

  • Transition from traditional telephony to a unified ToIP infrastructure
  • Consolidation of cabling infrastructure (single IT network)
  • Reduced outages and improved system reliability

Financial Benefits

  • Operating cost reduction: annual IT functional costs reduced by 4
  • Overall savings exceeded initial expectations

User Benefits

  • Streamlined technical skills: training focused on a single technology
  • Simplified maintenance and operations
  • Improved system scalability

Products & Solutions

Resources & Downloads

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