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Established in May 2002, Open Joint Stock Company (OJSC) MegaFon was the first all-Russian mobile operator using the GSM 900/1800 frequency band standard. MegaFon wanted to support vigorous growth of subscriber base and the implementation of new billing system modules. MegaFon migrated from Sun Fire E25K servers running Solaris 9 to HP Integrity Superdome servers and HP-UX 11i v3.
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