MLB-S-BGS2-BW Terminal User Guide
17
Rev 1.3
3.4.1
Blue LED
The AT^SSYNC command is used to control the Green LED status on the terminal.
Mode
LED Status
AT^SSYNC=0
SYNC mode:
Enables the SYNC pin to indicate growing power consumption during a transmit
burst. You can make use of the signal generated by the SYNC pin, if power
consumption is your concern. To do so, ensure that your application is capable
of processing the signal. Your platform design must be such that the incoming
signal causes other components to draw less current. In short, this allows your
application to accommodate current drain and thus, supply sufficient current to
the GSM engine if required.
AT^SSYNC=1
LED mode:
Enables the SYNC pin to drive a status LED installed in your application.
Note: <mode>=1 is the factory default of the MLB-S-BGS2 Series Terminal.
Table 6: AT Command for Blue LED Control for MLB-S-BGS2-BW
The following table lists the possible patterns of status LED behavior, and describes the terminal
operating status indicated by each pattern if AT^SSYNC parameter <mode>=1. To better monitor the
operating states while power saving is enabled.
LED behavior
ME operating status if AT^SSYNC=1
Permanently off
ME is in one of the following modes:
- POWER DOWN mode
- NON-CYCLIC SLEEP mode
- CYCLIC SLEEP mode with no temporary wake-up event in progress
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 channels and user interactions). No call is in progress.
75 ms on / 75 ms off /
75 ms on / 3 s off
One or more GPRS PDP contexts activated.
500 ms on / 50 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.
Table 7: AT Command for Green LED Control for MLB-S-BGS2-BW
