SITEL facilitates construction of telecommunication systems on cable networks at all levels - from backbone over metropolitan to access network. The services include not only the building of systems in xWDM, SDH, PDH and TCP / IP technologies, but also a versatile customer support from design of telecommunication network, project documentation, supply, installation and putting into operation to as-built drawings. Installation of an internal cabling, supervisory and power supply systems including a backup power supply (battery) is an integral part of construction of large telecommunication systems. This also applies to the area of data networks in buildings including structured cabling.

Wireless networks provide additional services to cable networks. Rapid construction and mobility of participants are the main advantages of wireless networks.  SITEL provides turn-key construction of wireless networks in microwave waveband technologies as well as WiFi and WiMAX access networks. It also participates in construction of cellular networks of some mobile operators. As with the cable systems, the company is able to provide warranty and post-warranty service for the above-mentioned technologies.