VLAN numbering in access networks which bi-directionally connect subscribers and service providers. The difference between the net polarization in at least one of the spacer layers and the net polarization in the light emitting layer is less than in the device with conventional spacer layers, such as GaN spacer layers. When the amount of loss of the base station selection signal exceeds a threshold, the transmission power of the downlink signal is not set to the minimum level but to the normally controlled level. The information includes a sensitivity level and an action to be applied to files observed by the network device that match the watermark filtering rule.