Moscow, Russia, June 20, 2007

"Multiregional Transit Telecom", a national operator of domestic long-distance and international communication in Russian Federation, announces the successful implementation of the signalling network monitoring and analysis system, supplied by the Swedish company "Polystar OSIX".

The Monitoring System is aimed to capture, process and store the SS7 network performance data and enables control of the network quality from the network and service perspective.

MTT  has implemented several Polystar applications, such as qGate and OSIX Monitoring, which enable tracing of the key performance indicators, supervision of the suspicious calls on the entire network, monitoring of the network status in real time, detection and isolation of the network failures and generation of the statistical reports on the network performance quality.

The implementation of the new signalling network monitoring and analysis system will allow MTT to make the next step in the continuous improvement of the quality of service provided to its customers.

MTT provides carriers with the "Access to SS7 network" services, consisting in routing of signalling roaming messages into the Russian national networks and transit of the signalling traffic to different countries. While providing this service, MTT performs connection to the SS7 networks, traffic processing and routing. This allows signalling interconnection with each Russian and foreign mobile network in 149 countries all over the world, as well as with Russian and foreign public networks.

______________________

About OJSC “MTT”
The open joint stock company “Multiregional TransitTelecom” (OJSC “MTT”), a national operator of domestic long-distance and international communication, has been in the RF telecommunications market for over 11 years. The company offers a wide range of telecom services, allows to efficiently exchange traffic between the networks of more then 100 fixed and  over 300 mobile operators throughout the territory of Russia.

OJSC “MTT” is the owner and operator of a digital multi-service national-scale network whose nodes are installed in all 88 subjects of RF. Using ample opportunities of its network infrastructure the Company offers a wide range of telecom services, allows to efficiently exchange traffic between the networks of fixed and mobile operators throughout the territory of Russia.
In light of the liberalization of the RF long-distance market in 2005 the OJSC “MTT” has been granted the official status of a national operator of domestic long-distance and international communication. Since the beginning of 2006 the company renders services of domestic long-distance and international communication to fixed network subscribers on the entire territory of the country.

About Polystar OSIX
The Polystar OSIX is and has been a successful player within the telecom OSS/BSS and test market since 1989. The company has its headquarters in Stockholm, Sweden.

Polystar OSIX is a telecommunication industry specialist, providing world class OSS and BSS solutions to the worlds leading operators and service providers. Polystar OSIX designs, develops, manufactures, markets, and supports highly flexible systems for signalling network monitoring, statistics, quality assurance, real-time xDR-generation, and operational support systems for fixed, mobile, VoIP, and NGN networks.

Polystar OSIX offers customer adapted systems increasing revenues, and reducing income shortfall. The total scalability enables customers of all shapes and sizes to benefit from the products. The core idea is to extract information directly from the telecom links, process it, and present it in customer-defined formats. Learn more about Polystar telecommunication solutions by visiting  www.polystar.com