Provided herein is a process for producing alkylene carbonates of ultra-high purity. One action is to selectively reduce a filter bandwidth in a WLAN radio applied to a received WLAN radio signal to reduce BlueTooth signal interference. The Gm setting code is inputted into a switching circuit which turns on and off at least one of said Gm setting devices. The NMS uses the contents of the uploaded configuration file to update the information in the NMS database.