Wentronic RJ45 Y-cable and TAE Telephone Adapter (2x RJ45 to RJ45) (optional)
This cable replaces the cable AVM which was at the Fritz box 7390 here, this AVM cable is somewhat error-prone that it creeps one, n'bei me were on the RJ45 connector, the plastic Lietschienen bent so that I had a bad contact. So get the Wentronic Y-
