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Development of three-site multi-channel digital dispatching operations radio communication network

In 2003 — 2006 ZAO "BUDAPHONE LTD" designed and built a large radio communication system for the benefit of Main Department of Internal Affairs (MDIA) of St. Petersburg and the Leningrad Region. A digital radio communication technology under APCO 25 was taken as a basis of system development, employing some advantages against analog radio communication.

Network generation and management was performed on the basis of MOTOROLA's ASTRO Multicast conventional system. To ensure availability of guaranteed radio connection wherever in the city, a fixed infrastructure of conventional radio communication comprises six radio-sites linking 18 radio channels in one network covering St. Petersburg area. Thanks to the central CENTRACOM Gold EliteTM commutator, it is possible to control network in on-line mode, generate users group, connect other networks and telephone lines to the system.

Initially, number of users was 350. Experts of ZAO "BUDAPHONE LTD" completed installation and configured base stations (radio-sites), programmed the entire system of MDIA radio communication. A serious challenge for the MDIA radio communication system was celebrating St. Petersburg's 300 years Anniversary, when the system proved to be efficient and reliable tool operating in increased load mode.

Later on, after 2 years of successful operation decision was made to update dispatching radio communication network and its integration in ASTRO trunking system, in order to increase number of users and enhance throughput of channels. Experts of ZAO "BUDAPHONE LTD" were instructed to develop and implement modernization project. As a result, opportunity emerged for more efficient use of radio frequency resource and increase number of users without loss in communication security quality. The most part of the radio channels (13) are converted into ASTRO 25 trunking system. Two channels in every radio site, used by conventional network users, are dedicated for ASTRO Multicast system existing since 2003. An interaction between users of two system is fully maintained.

ZAO "BUDAPHONE LTD" was awarded with Letter of Gratitude signed by the RF Deputy MIA Minister for successful implementation of three-site multi-channel digital dispatching operations radio communication network of St. Petersburg MDIA.

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