Confidential
USERS MANUAL
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Document number
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1/198 17-4/FCP 101 3045 Uen
D
4.2.12.2 Shutdown
Unsolicited
Message
The CM52 produces an unsolicited message when the unit shuts down to the point that power can safely be
removed from the module by releasing the MODULE_PWR_EN_B pin.
The format of the unsolicited response is:
Shutdown Complete
4.2.12.3
Shutdown Unsolicited Message (RTC Mode)
The CM52 produces an unsolicited message when the unit shuts down to the point that power can safely be
removed from the module by releasing the MODULE_PWR_EN_B pin.
This is a variation of the original shutdown complete message; the RTC mode shutdown indicates that the
module powered down and the RTC enabled to wake the module up at specified times. Refer to AT+CFUN for
more details.
The format of the unsolicited response is:
RTC Shutdown Complete
4.2.12.4
RING Unsolicited Message
The CM52 produces an unsolicited message when a mobile terminated call (voice or data) must be handled by
the host application. The message is repeated on a periodic basis until the call is either answered or torn
down by the network.
The format of the unsolicited response is:
RING
4.2.12.5
Offline Unsolicited Message
The CM52 produces an unsolicited message when the unit has been put into an invalid mode and cannot
continue to communicate with the network. The module will continue to remain in offline mode until the host
application addresses why the module went into offline mode and then restarts the module.
The format of the unsolicited response is:
OFFLINE
Going into offline is usually a result of an invalid NAM setting that the module cannot resolve. For example, if
the application requests the module to go to NAM2, and NAM2 has not been configured correctly, chances are
the module will go offline. When that happens the module must be set back to the valid NAM and then
restarted.
4.2.12.6
Async Data Communication Established Unsolicited Message
The CM52 produces an unsolicited message when an async data communication is established with the other
end of the data call.