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PT Centratama Telekomunikasi Indonesia Tbk The country’s trusted telecommunications infrastructure provider ABOUT THE COMPANY Under the publicly listed company PT Centratama Telekomunikasi Indonesia Tbk (CTI), we are a group of companies that provides tower infrastructure and in-building DAS (distributed antenna systems) for cellular networks, as well as fiberized broadband internet services. CTI consists of three subsidiary companies as follows: PT Centratama Menara Indonesia – focusing on providing tower infrastructure for cellular networks. PT MAC Sarana Djaya – focusing on providing in-building DAS for cellular networks.