In a communication network comprised of a central management entity and plurality of terminals, methods and systems for remotely binding terminals to the network and for unbinding already bind terminals when necessary. A cable element is attached by one end to the support frame and the seat pan includes locking means adapted to allow the cable to slide during the voluntary variations in height of the seat pan in relation to the frame or, alternatively, to block the cable element by jamming during a high deceleration so as to prevent the seat pan from moving up in relation to the support frame. 01 wt per ct in the reaction mixture; adding a H2O reactive latent hardener and optionally, at least one catalyst, and airtight packing of the resulting sealing and coating compound. The second radiating body includes three parallel bar shape sheets extending from the first radiating body and surrounded by the first radiating body, and both share the feed line.