Communication network with optical waveguides between subscribers and centre in existing supply lines

摘要

The network has optical waveguides between subscribers and communication centres in existing supply lines for fluid media e.g water, sewage gas or heat. The waveguides (7,8) are fed into the supply lines (4,6) via conduits (16). The waveguides (7,8) have a coating (12) to protect against the effect of the medium used in the supply lines (4,6). The coating (12) may be made of e.g. protective plastic e.g. silicon or metal e.g. copper, chrome or gold. Individual waveguides may be inserted into the supply lines. Several individual waveguides may be combined into a connecting waveguide. The conduit unit (16) may have a removable stopper with openings for the waveguides. The openings have gas and water tight seals.