The paging-related alarm of RNC is flow control alarm. When RNC is inpaging flow control state, the paging message will be discarded . When theCPU occupation or the message packet occupation of a board sub-systemexceeds the threshold, the system will switch to the flow control state, andthe flow control alarm will occur. When the system returns to normaloperation state from the flow control state, the flow control recovery alarmwill occur. However, it is not absolute that paging will be discarded whenflow control alarm occurs, because RNC owns different flow controlthresholds for different flow control objects (paging, serial port printing andmessage tracing), as long as there is flow control, alarm will occur; butpaging loss will occur only when paging loss occurs.