ANALISIS PERFORMANSI LAYANAN VOICES BERBASIS IP PADA SAMBUNGAN LANGSUNG JARAK JAUH (Studi Kasus PT INDOSAT, Tbk Layanan GLOBALSave) ANALYSIS OF IP BASED VOICES SERVICE PERFORMANCE ON LONG DISTANCE CALL ( Case of Study PT.INDOSAT, Tbk GLOBALSave Service )
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