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Slavneft oil-and-gas enterprise was founded in August 1994. Nowadays Slavneft ranks among the top oil concerns of Russia. The main oil production company of the enterprise is Slavneft-Megionnftegas. It has all necessary divisions for oil-field construction, well boring, construction and operation as well as for oil treating for transportation.

Since 1995 Slavneft-Megionneftegas has been building its telecommunications on the basis of Alcatel equipment. 5200 PABXs became the corner-stone for its telecom network. The fundamental modernization of the companys telecom system was caused by its dynamic development.

In 2005 INTERSYST started updating Slavneft-Megionneftegas telecom network. Technical design of the object and development of modernization documents were made by INTERSYST experts. The first update stage ended in 2006. By now 2 PABXs has been replaced by modern Alcatel OmniPCX Enterprise telecommunication servers with Alcatel GateWay switch that ensured interaction between renewed and old network segments. Digital 2-Mbit/s streams with EuroISDN signalling have provided PSTN output. DECT mobile microcell network, Aliance selector system, network voice mail system, CTI applications as new services were granted to the companys subscribers. The company has been supplied by 9 series Alcatel terminals with localized for Russia displays.

In 2009 INTERSYST realized the next in turn phase of telecommunication network modernization at Slavneft-Megionneftegas. The network capacity is significantly expanded and new conference system is launched into exploitation.

In 2010 INTERSYST carried out putting into operation of two telecommunication servers Alcatel-Lucent OmniPCX Enterprise. Owing to this fact the communication on two remote deposits of Open Society "Slavneft-Megionneftegaz" is provided for. The capacity of each station serves 64 analog subscribers, the possibility of expansion is also planned. Telecommunication servers are included in a network on stream E1, network function is provided in stations, ARS, appendix OmniVista 4760 (administration, tariffings and the emergency signals gathering), power supplies system is installed.

In 2012 INTERSYST carried out upgrading of corporate telecommunication network, replacement of outdated equipment on 2 units and increasing of subscriber capacity based on Alcatel-Lucent equipment.