From the Config Tool, you can reconnect multiple ALPR units that use the LPM protocol. What you should know Procedure In Config Tool, ALPR > Roles and units. Right click on an ALPR manager role, and click Reconnect ALPR units (LPM protocol). Alternatively, click Maintenance > Reconnect ALPR units (LPM protocol). A pop-up message displays the progress. Repeat the previous step for each ALPR role that has offline ALPR units using the LPM protocol.