Links operating at a higher frequency such as 80 GHz, or over long distances, are sensitive to weather conditions. As a rule, the ACM function reacts to deteriorated climatic conditions by reducing the modulation, which corresponds to the bandwidth of the link. Link state propagation (LSP) function allows the unit or the entire link to automatically respond to reduced radio channel throughput. This can be used to advantage in networks whose topology allows the use of a backup link or route that is less sensitive to weather.

Communication between units is maintained even when LSP is activated (provided the received signal level is above the most robust modulation sensitivity). Various LSP actions can be triggered when LSP is activated. Access to the GUI of remote unit is possible via port forwarding of the local unit (allowed ports are: 8022, 8023, 8080, 8161 and 8443).

	Note
	The rules defined in the VTU table override the VLAN member rules that are automatically modified by the LSP functions. For packets with VLAN IDs defined in the VTU table, the setting of the LSP function is not affected and continues to follow the rules of the VTU table.