Multi Operator Services is an In Building-System site sharing provider. This allows separate operators with different technologies, namely GSM, DCS, 3G, HSDPA, CDMA, EVDO and Wi-Fi to be integrated into one building system. This service also serves to help the deployment of BTS indoor coverage in Indonesia. This division of the company is focused on expanding and deploying indoor building coverage on high traffic areas such as malls and office buildings. Our concept is of one Distributed Antenna System (DAS) for multiple cellular operators. The system provides efficiency of space utilization, reduce reworking of the building infrastructure and provide additional yet substantial income for the building owner. For the cellular operators, we accommodate the ease of renting the indoor system instead of high capital expenditure associated with each operator building their own DAS network.