Case Study: Siemens AG achieves unified, scalable global communications for 350,000 employees with Atos Circuit

Siemens AG - Customer Case Study

Siemens AG needed to modernize and standardize its global communications for more than 350,000 employees, replacing an outdated UC landscape with a scalable, easily integrable solution that supported PBX, file sharing (Syncplicity), mobile use (One Phone) and worldwide availability. Siemens selected Atos’ cloud‑based communications and collaboration application Circuit to provide an enterprise‑ready, flexible platform.

Atos deployed Circuit on a redundant private‑cloud backbone with WebRTC, APIs, an Advanced Telephony Connector and Circuit Meeting Room, backed by global managed services and an agile development cadence. The Atos implementation passed stress tests up to 350,000 simulated users, was live‑tested with 15,000 users, rolled out to 350,000 employees in six weeks, and now supports 1.2 million messages and 1.8 TB of shared data per day (with 75,000 daily mobile users), delivering a consistent, future‑proof communications platform and measurable improvements in collaboration and user satisfaction.

Siemens AG

Helmuth Ludwig

CIO