Anyone in the router and telephone socket are close together, and if the problems with the stability of its DSL connection should seriously consider a shorter cable to connect its router to the telephone socket. My FRITZ! Box using the supplied AVM 3-meter cable to make a record-breaking 110 days DSL Resyncs done in one day. With the new cable, which now has the correct length, and not many loops in the cable conduit is unter'm desk, I now have a stable and high-performance DSL connection.
The cable is properly processed, because you can really say anything. However, the command does not correspond to the RJ45 connector of the figure. It keeps naturally anyway, only you should ensure that the plug will not be charged on the train.