This document is effective when optical cabling in a building is shared with multiple optical access operators. The figure below shows a schematic representation of what could exist in a building with multiple operators' FTTH access networks@ without shared cabling. Many cables and boxes could be installed in common parts in this assumption which can cause permanent disturbance for inhabitants. Besides@ saturation of infrastructures could be reached with a strong impact on reliability of existing and new cables and on maintenance issues. A challenge for operators in that case could be to try to provide the condition for optical cabling sharing inside the building.