A diagnostic device, for use in a communication network including network equipments is provided. The assembly includes a non-rotating or non-walking pressure foot that has a laterally displaced inner foot from the inner feed dog of the machine. Examples of such low power application requests include a suspend operation request issued by an operating system. The transmitting module transmits voice packets, dropping voice packets according to the packet dropped rate, ensuring an even distribution of dropped voice packets during the transmission. This operation makes it possible to avoid the degradation of said reaction intermediate over time, which is responsible for the decrease in purity of the dialkyl disulphide. A system for positional control of an actuator includes the actuator included in a well tool positioned in a well; the input line connected to the actuator and extending to a remote location; the output line connected to the actuator and extending to the remote location; and a fluid volume measurement device connected to the output line at the remote location.