An electronic transmitter device has a puncturing device with two data outputs andor an interleaver with two data inputs. An identification of a virtual private network may be carried within a request packet, encapsulating a particular packet, sent by a service node to an application node for applying a service to the particular packet; with the corresponding response packet sent to the service node including an identification of the VPN for use by the service node in forwarding the services-applied packet. The control mechanism has a built-in length detecting and automatic sorting mechanism, which can modify the spring spacing according to different free heights, ensuring the allowance of free height. The torque transmitting devices may include clutches and brakes. A report schema specifying how data for a report is to be processed and formatted is received.