Siemens MC55 AT manual ME status indicated by status LED patterns

18.6.1ME status indicated by status LED patterns

The following table lists the possible patterns of status LED behavior, and describes the ME operating status indi- cated by each pattern if AT^SSYNC parameter <mode>=1.

During the transition from one LED pattern to another the "on" and/or "off" periods of the LED may vary in length. This is because an event that triggers the change may occur any time and, thus, truncate the current LED pattern at any point.

Table 18.1: Modes of the LED and indicated ME functions

LED behavior	ME operating status if AT^SSYNC=1
Permanently off	ME is in one of the following modes:
	- POWER DOWN mode
	- ALARM mode
	- CHARGE ONLY mode
	- NON-CYCLIC SLEEP mode
	- CYCLIC SLEEP mode with no temporary wake-up event in progress 1)
600 ms on / 600ms off	Limited Network Service: No SIM card inserted or no PIN entered, or network
	search in progress, or ongoing user authentication, or network login in progress.
75 ms on / 3 s off	IDLE mode: The mobile is registered to the GSM network (monitoring control chan-
	nels and user interactions). No call is in progress.
75 ms on / 75 ms off /	One or more GPRS PDP contexts activated.
75 ms on / 3 s off
500 ms on / 25 ms off	Packet switched data transfer is in progress.
Permanently on	Depending on type of call:
	Voice call: Connected to remote party.
	Data call: Connected to remote party or exchange of parameters while setting up
	or disconnecting a call.

1)When a temporary wake-up event (for example a call, a URC, a packet switched transfer) occurs in CYCLIC SLEEP mode the LED flashes according to the patterns listed above. See Section 2.8.1, Wake up the ME from SLEEP mode for details on the various SLEEP modes and wake-up events.

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