The invention relates to a fastening device for an elongated object, in particular a cable tree, having a holder intended for attachment of the elongated object and an adjacency surface for the elongated object, and having a fastening element connectable to the holder for fastening the holder to a part. The sign has at least one protruding ridge extending from the backside with the ridge having a narrow neck portion proximate the backside. Each bearing housing half is provided with an arrangement adapted to interconnect the two bearing housing halves in a weatherproof manner. Based on the travel time and the appointment time, the system may determine whether the first participant is estimated to arrive at the appointment on time and, based on the determination, the system may send a message to participants of the appointment or dynamically reschedule the appointment.