A link-sharing classification hierarchy is described, characterizing network traffic at a high level both to allow measurements of network traffic to be aggregated according classifications in the hierarchy and to describe a policy for network quality of service. An inner lining layer is joined to the top edge of the upper layer for providing comfort. A radio frequency choke is communicatively coupled to URD MV cable between first and second coupling capacitors. The attenuator circuit includes an attenuation matrix including an input terminal to receive the signal and multiple resistors.