In the scope of complete service for telecommunication infrastructure ENERGO-TEL provides also installation and operation of active telecommunication devices, which allow the company’s Customers for data transmission in technologies like:

• WDM - Wavelength Division Multiplexing - technology for multiply signals by laser light, the use of several (even hundreds) of different wave lengths (colors), transmitted at the same time, in the same transmission medium (a single fiber optic cable). Each length creates a separate "channel" that can carry separate information. Depending on the number of channels can be distinguished technologies CWDM - Coarse Wave Division Multiplexing and DWDM - Dense Wavelength Division Multiplexing.
• SDH - Synchronous Digital Hierarchy - a data network technology, characterized by work in synchronous mode (Confluence) of all devices in the network SDH. These devices are synchronized, both with the master clock (PRC), and with each other. SDH networks allow transmission of digital data between distant points and the possibility of mapping the structure of many types of signals synchronous with lower bit rates, synchronized with SDH. The technology is used by GSM, Internet, DQDB, FDDI. SDH networks are also characterized by a higher reliability than the other, and lower susceptibility to damage.
• PDH - Plesiochronous Digital Hierarchy - a technology used in telecommunication networks. Plesiochronous means, that PDH network elements are synchronized with each other, but not in an ideal manner, which follows from the fact that each of the active elements of the network have its own clock. PDH technology is based on pulse code modulation (PCM).

• xDSL - Digital Subscriber Line X - is a collective term of all digital subscriber lines that use multiple modulation schemes for data transmission over balanced copper lines. xDSL includes ADSL, SDSL, CDSL, RADSL, VDSL, ISDN, DSL.

• Ethernet - is currently the main technique in which standards used to build the network and IT systems are set. It includes the specification of cables and transmitted by them signals. Ethernet describes also format of frames and protocols of the two lowest layers of the OSI model.

• Frame relay - transmission technique based on packet switching. This technology is used to connect remote local area network (LAN), data, video, voice transmission and and Internet access. Information is divided into frames of variable length, which transfer data across a LAN, which allows the transfer of information between distanced networks (WANs). Characteristic features of frame relay technology is to eliminate flow control and error detection.
• ATM - Asynchronous Transfer Mode - a kind of communication technology for broadband data transmission. ATM enables interactive data transmission, file sizes, video, and voice. This technology is used in local area networks, and wide area city. Data transmitted in the form of ATM technology are provided in a short packet header.

ENERGO-TEL has many years of experience in the installation, configuration and operation of equipment by leading manufacturers such as 3Com, OneAccess, Alcatel-Lucent, Bitstream, Cisco, Ericsson, Huawei, Lanex, Marconi/GPT, NewBridge, Nokia, Siemens, Transmode, Telindus and many others.