The %XMODEMSLEEPAT command sends notifications of different types of modem sleep periods. The
sleep types are Power Saving Mode (PSM), RF inactivity, limited service, and flight
mode.
PSM sleep PSM sleep is typically a longer sleep that ranges from minutes to hours. The PSM period starts after radio connection has ended when the negotiated activity time has elapsed.
RF inactivity sleep
RF inactivity sleep is usually caused by eDRX. RF inactivity ranges typically from seconds to minutes. When an RF inactivity sleep ends, the modem continues to monitor the serving cell and can be reached by the network.
Limited service sleep
During limited service sleep, the modem sleeps between cell search attempts. The length of the sleep depends on the search pattern. The application configuration can affect which search pattern is used.
Flight mode sleep
During flight mode sleep, the modem sleeps because the application has deactivated it. The length of the sleep cannot not be determined, and a prewarning is not sent. The sleep ends when the application activates the modem.