During permanent link measurements the RJ45 plug of the measuring cable is the main wearing part because the RJ45 plugs age over time due to repeated insertions and have to be replaced. The longlife measurement cables feature a field replaceable RJ45 plug, which can be changed by the customer in just a few minutes. Corresponding replacement parts are offered. Measurement cables can also occasionally be damaged in the field, e.g. by being jammed in steel cabinet doors or device cases. Another advantage of the longlife measurement cables is that the measurement cable itself is a comparatively inexpensive and easy-to-exchange spare part.