Anières, Switzerland

Mobile signal was very poor in this underground two-storey carpark, as the steel and concrete construction materials completely blocked the mobile signal from entering the car park.

Given the area’s status and clientele—business travellers and a high-earning population—seamless mobile connectivity is not a luxury but an absolute necessity. These users demand strong, uninterrupted mobile signal as an essential part of their daily routine, whether for business calls or using mobile apps for EV-charging.

To meet these high expectations, a robust mobile signal solution was required to ensure flawless connectivity throughout the underground facility.

The car park management team recognized the critical importance of strong mobile signal coverage throughout the facility. While WiFi was available, it quickly became clear that it was causing frustration among users, leading to several key issues:

• WiFi calling was unreliable, as visitors frequently experienced dropped calls due to their phones switching between different WiFi access points as well as cellular network while moving through the car park.
• High-profile visitors disliked spending time on passwords and logins just to access the internet.

To resolve these challenges, the management team contacted DMR Telecom for a professional mobile signal solution. Their top priorities were:

✔ Secure, reliable mobile connectivity for all visitors.

✔ Amplification of mobile signal from all operators 

✔ Ultra-fast 5G connectivity at EV-charging stations for using mobile apps and payment transactions.

The installation process began with an on-site survey using TestTool in Full Scan mode, which scanned all nearby cell towers across different operators. This allowed the installer to identify the most suitable cell tower to align the external Yagi antenna for maximum signal strength. The TestTool then automatically sent the survey data to StellaControl, our cloud-based platform, for further assessment.

Following an on-site survey using TestTool, DMR Telecom identified R5-O StellaOffice repeater as the optimal solution for the following reasons:

• R5-O StellaOffice repeater amplifies signal from all mobile operators for all services
• Enables crystal-clear quality of phone calls
• Ensures super fast 5G for EV-charging stations
• Unlimited number of users can enjoy strong mobile signal

Before proceeding with the installation, DMR Telecom utilized StellaPlanner, our online design tool, to plan the installation. The installer uploaded building plans and strategically positioned R5-O StellaOffice repeater and Yagi antennas to ensure seamless mobile coverage throughout the underground car park. This planning phase ensured that all areas would receive optimal signal strength, and that all necessary equipment was accounted for prior to installation.

For maximum amplification and distribution of the signal within the underground car park, internal Yagi antennas were selected due to their high gain capability. These antennas were strategically installed in a back-to-back configuration to ensure complete coverage, eliminating potential signal dead zones.

Equipment installed:

• R5-O StellaOffice repeater
• External Yagi antenna
• Internal Yagi antennas Model: YAGI6ANT
• Omni ceiling antenna Model: CEILING6ANT
• SD 400 cable
• SD 600 cable
• Splitters
• Pigtails

By following this methodical approach, DMR Telecom amplified mobile signal in the underground parking facility, ensuring reliable signal strength for all users.

Throughout every step of the installation, Stella engineers provided full technical advice and support via the WhatsApp Technical Helpline. This direct communication channel ensured that installers had real-time guidance, troubleshooting assistance, and expert recommendations, further streamlining the process.