Electrical facility construction work for information network structuring by the use of sewage conduits

摘要

To confront the advent of the advanced information society, there has been a pressing demand for the adjustment of the communications infrastructure and the structuring of the information network by utilizing the sewage conduits. The City of Tokyo is promoting a project by the name of the sewer optical fiber teleway (SOFT) network plan. According to this plan, the total distance of the optical fiber network laid in the sewer conduits is scheduled to attain about 470km by the end of March 2000. At the final stage, this distance will reach 800km as a whole. Recently, we completed the construction work for the information control facilities scattered in 11 places inclusive of the Treatment Site S, with the intention to adjust and extend the information transmission network laid through the above-mentioned optical fiber network, to be used exclusively by the Bureau of Sewerage. (This project is part of the construction work for the information control facilities, promoted by Sewerage Bureau of Tokyo Metropolitan Government.) The contents of this construction work are described below.