A circuit board assembly is provided. The lamp housing includes a first opening lower than, and a second opening higher than the lighting control circuit. The electromagnetic wave can propagate longitudinally along the surface of the transmission medium and at least partially around the surface of the transmission medium. The apparatus also includes a first port task scheduler to manage the tasks to be forwarded to the one or more of the plurality of protocol engines. An electronic device is attached to the insert for emitting spiritual music or prayers for comfort. In addition, the AC may determine, according to the roaming group information and the received reauthentication or reassociation message, whether the STA is roaming between roaming groups or within a roaming group.