A system having a plurality of tracing interface modules that attach to the patch panels of a telecommunications patching system in a telecommunications closet. On the patch panels in a telecommunications closet are located a plurality of connector ports that receive the terminated ends of patch cords....http://www.google.de/patents/US6350148?utm_source=gb-gplus-sharePatent US6350148 - Method and device for detecting the presence of a patch cord connector in a telecommunications patch system
