Siemens AC75 Manuel D’Utilisation

s

AC75_ATC_V01.002

Page 494 of 569

10/30/06

Confidential / Released

The following table lists the possible patterns of status LED behavior, and describes the ME operating status indi-

cated by each pattern if 

 parameter 

=1 and 

=2. To better monitor the operating states

while power saving is enabled, we recommend that priority be given to 

=2. 

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. 

The statements on LED behavior during SLEEP mode are not applicable if the USB cable is plugged. This is

because power saving with connected USB host does not take effect if set with 

 only. For details see

notes provided with 

. Therefore, while the USB cable is plugged, the LED is always on and flashes as

if the module works at 

=1, no matter whether 

=2 is enabled. 

Table 19.1:  Modes of the LED and indicated ME functions

LED behavior 

ME operating status if 

ME operating status if 

=2 

Permanently off 

ME is in one of the following modes: 

- POWER DOWN mode 

- AIRPLANE mode 

- CHARGE ONLY mode 

- NON-CYCLIC SLEEP mode

- CYCLIC SLEEP mode with no tempo-

rary wake-up event in progress 

1)

 

ME is in one of the following modes: 

- POWER DOWN mode 

- AIRPLANE mode 

- CHARGE ONLY mode 

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. 

Same as for 

75 ms on / 3 s off 

IDLE mode: The mobile is registered to 

the GSM network (monitoring control 

channels and user interactions). No call 

is in progress. 

Same as for 

75 ms on / 75 ms off /

75 ms on / 3 s off 

One or more GPRS PDP contexts acti-

vated. 

Same as for 

500 ms on / 50 ms off

Packet switched data transfer is in 

progress. 

Same as for 

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. 

Same as for 

<n> ms on / <n> ms off 

2)

  Not possible: With 

=1, LED 

signalization is disabled in SLEEP 

mode. 

SLEEP mode is activated (

parameter 

≠ 1), but the ME is not 

registered to the GSM network (e.g. SIM 

not inserted or PIN not entered, and 

therefore, either no network service or 

only Limited Network Service is avail-

able.