A master clock reference signal may be provided to selected packet fiber nodes in order to synchronize the local clock reference signals generated at selected devices in a cable network. First and second electrodes are spaced apart with the first electrode being spaced apart with the first electrode being provided at or adjacent the liquid outlet. The nonwoven can have a nonwoven body facing surface. The control information explicitly or implicitly indicates an upper bound and a lower bound of a back-off time value.