In the external communication transmission path inside the building which is jointed to the distributer which

摘要

PPROBLEM TO BE SOLVED: To lay an optical cable for the residents of a building in a short period at a low cost, by decreasing the number of supports of a vertical wiring way, without performing large-scale works of building, e.g. drilling of floor. PSOLUTION: The external communication transition cable 5 of a communication transmission line between the inside and the outside of a building including a distributor connection cable 7 for connecting a distributor 11 with an external communication cable connector 8 provided on the wall 32 of elevator shaft by floors, and an external communication transition cable 5 for interconnecting the external communication cable connectors 8 is installed inside an elevator shaft 30. PCOPYRIGHT: (C)2007,JPO&INPIT