Voice and data communication solutions

KONTRAX offers integrated complex solutions for building new or expanding existing voice and data communication systems and networks. Our team of certified specialists can advise you when choosing the optimal solution, as well as it can participate in the different phases of implementation:


  • Studying and taking the current state
  • Development of a “conceptual” and/or “working” project with definition of the exact parameters of the necessary equipment and systems
  • Delivery, installation and commissioning of systems
  • Warranty and post-warranty service maintenance based on special subscription contracts for the entire country

The main manufacturers KONTRAX works with in the field of voice and data transfer systems and networks are AVAYA, Cisco Systems, Allied Telesis, ZyXEL, ZTE, Dell, Juniper, etc.


KONTRAX has considerable experience in warranty and post-warranty maintenance of communication networks. The company has qualified specialists who provide maintenance 24/7, 365 days a year for important communication systems, because stopping it is unacceptable for the client.


State Enterprise Bulgarian Air Traffic Services Authority (BULATSA)
State Enterprise Bulgarian Air Traffic Services Authority (BULATSA)

Delivery of active network equipment for network architecture replacement and reorganization

Kostal Bulgaria
Kostal Bulgaria

Delivery of communication equipment and construction of a structured cabling system