Design of communication networks

Specialists of JSC Lengiprotrans complete assignments in the area of development and upgrading of the transport network of the fixed-electric communication system, devices for operational communication and basic telephone communication, data transmission systems, the centralized integrated announcement system for passengers, radio communication and video surveillance systems for the telecommunication infrastructure of the RZD Holding (Russian Railways). The comprehensive projects involve:

• upgrading the transport network of the fixed-electric communication system, using the DWDM and CWDM technologies for data transmission through multiple channels via one optic pair;
• implementation of the transport access network based on next generation synchronous digital hierarchy multiplexers (NextGeneration SDH, NG SDH), level STM-1/4/16;
• implementation of the data transmission transport system based on 10 GigabitEthernet channels and using ring topology;
• implementation of the operational communication system on the basis of integral switching stations, with packet switching (IP-technology);
• implementation of the basic telephone communication network on the basis of geographically distributed IP-АТС;
• upgrading the basic data transmission network;
• implementation of a centralized integrated announcement system for passengers and staff working on railway tracks, and a station yard communication system;
• broadband access networks with wire access, based on the most common technologies;
• implementation of a railway digital radio communication system;
• implementation of a monitoring and control system for the communication network of the process segment of the data transmission system, with integration into the Unified System for Monitoring and Administration of Process Communication of the RZD Holding (Russian Railways);
• implementation of time-standard system;
• implementation of a network clock synchronization system;
• implementation of an audio conference call system;
• implementation of a video conference call system;
• reconstruction of trunk communication networks using ground buried cables and fiber optic communication cables suspended on the masts of the overhead catenary, the masts of the automatic interlocking high-voltage lines and buried in the ground;
• construction of secondary communication networks using symmetrical and fiber optic cables;
• installation of telephones, radios, digital clocks in service, industrial and public buildings;
• fire and security alarm systems in service, industrial and public buildings;
• creation of structured cable systems and data transmission systems at electrical centralization posts and in service buildings;
• implementation of process related data transmission channels (centralized traffic control and monitoring system, automated rolling-stock monitoring system, automated telecontrol system, automated system for commercial power metering);
• an action package to ensure transport safety.