Low voltage systems for buildings


KONTRAX builds cabling infrastructures including the design, construction, delivery and installation of specialized modules and equipment, tested and certified.
KONTRAX is a representative and authorized partner of the leaders in cabling system solutions – Systimax (Commscope) and Brand-Rex.
Systimax SCS is a collective name for a wide range of passive components, combined in several product lines. Since 2005, Systimax has been a part of Commscope.


Systimax (Commscope)

  • Discoverers and founders of the concept of structured cabling back in the 1980s (Bell Labs)
  • The largest global manufacturer of components for cabling systems (with over 20% of the global market share every year)
  • They have traditions and experience in the field of communications of more than 130 years – from the discovery of the telephone by Alexander Bell back in 1876 (Bell Labs) and the twisted pair to modern solutions (2007) such as providing traffic of 10Gbps over copper cable and 100Gbps over fiber optic
  • 20-year warranty on all components, on the system as a whole and on future applications that are expected to work on this system

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Provides full 25-year warranty on every installed network. The warranty covers both individual components and the network performance as a whole.

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Fire alarm

Fire alarm is one of the life-saving systems accompanying our life in modern city. There isn’t and must not be any compromise in this system. KONTRAX specialists who design, build and maintain fire alarm systems have long experience in the field and guarantee the high quality of the systems.
There are two main types of fire alarm systems:

  • Conventional
  • Addressable

Video surveillance

KONTRAX builds IT-based solutions for video surveillance of industrial and private sites, multipurpose buildings, urban environment, open spaces and border areas. A well-built video surveillance system is prevention against abuse, fraud, material or intellectual property thefts, as well as against burglaries.
KONTRAX designs, builds and maintains all types of modern video surveillance systems.

  • IP cameras; Analog CCTV cameras; HD cameras
  • Picture quality
  • Construction, cabling and cable infrastructure
  • Integration with other security systems such as access control, alarm and security equipment (ASE) and fire alarm


Alarm and security equipment is invaluable in guarding our home, office or warehouse. KONTRAX has extensive experience in the design, construction and maintenance of ASE systems of any kind. From small home systems to the secutiry of public buildings, hotels and airports. The types of ASE systems are divided according to their constituent modules:

Control keyboard
Analog and digital sensors:

  • Motion infrared sensors – PIR /passive infrared/ microwave sensors
  • Ultrasonic sensors
  • Magnetic sensors
  • Acoustic sensors
  • Combined sensors
  • Wireless sensors
  • Alarm and alert devices

Access control

The access control systems in a modern office building are irreplaceable. They provide the right passenger flow in the building, as well as the security in restricted areas. The functions of a system are:

  • Control or restriction of the access of people and vehicles on the territory of the secured site
  • Control of staff movement within the territory of the company
  • Restriction of access to certain areas
  • Verifying the identity of employees with smart cards and keys
  • Automatic identification of visitors (passports, cards, key chains)
  • Integration with the video surveillance system
  • Integration with accounting programs and scheduling of working hours
  • Taking into account the working hours of staff and tracking of labor discipline

Audio system

Sound systems are designed primarily for broadcasting background music. They consist of:

  • Control panel
  • Microphones (wired or wireless), connected to the sound mixing panel
  • Speakers divided into groups that can be controlled separately

TV system

TV systems provide the reception in key points in the building, hotel or office (showroom, cafe, canteen, etc.) of:

  • All broadcasting TV programs
  • The showroom’s own program from DVD
  • Several hundred SAT-TV-programs (from satellites ASTRA 19,2 E and HOTBIRD 13E).

They consist of

  • Satellite dish complete with convertors
  • Log-periodic antenna
  • Multiswitch
  • Modulator for transmission of own advertising program

Integrated security solutions

  • Access control solutions
  • Integrated platforms for security management of commercial and enterprise applications
  • Integrated video solutions
  • They include network DVR (digital video recorder), cameras and complete CCTV systems
  • Visitor movement management solutions
  • Visitor movement management solutions enhancing the professional image of the company.
  • Perimeter protection
  • Effective security solutions extending the boundaries of the protected perimeter off site

Buildings security solutions

  • Consultations
  • Customer requirements / development of specifications
  • System engineering and integration – project management
  • Delivery (direct, indirect or a combination)
  • Performance of acceptance tests
  • Maintanance and service
  • Offering
  • Security management solutions (ProWatch, DVM, Vindicator, EBI)
  • Access control and video surveillance
  • Perimeter security systems
  • Third-party products
  • Global sales and project management enabling standardization

Lindner Bulgaria
Lindner Bulgaria

Building a structured cabling system in a Coca Cola Enterprises office

General Labour Inspectorate
General Labour Inspectorate

Building the communication infrastructure

Kostal Bulgaria
Kostal Bulgaria

Delivery of communication equipment and construction of a structured cabling system

Sitel Bulgaria
Sitel Bulgaria

Construction of low current and high current installations in Sitel, Varna city