How It Works - CipherLab 8000 GPRS Cradle Reference Manual

8000 GPRS Cradle Reference Manual

1.1 HOW IT WORKS

Referring to the flow chart on the next page, LED 2 and LED 3 are used to indicate a
specific stage of initialization, data connection, as well as firmware download. They are
explained below (by number).
1) Initializing
After powering on, the LEDs of Tx/Rx and Link will flash by turns at the time interval
of 0.25 seconds for about 30 seconds, indicating the cradle is in initialization process.
2) Initialization OK
If initialization is done successfully, the LED of Link will flash at the time interval of 1
second, waiting for AT commands.
3) Initialization NG
If initialization fails, the LED of Tx/Rx will flash at the time interval of 0.5 seconds,
indicating an error occurs. For example, it might fail to pass PIN authentication, the
signal strength is weak for the GSM network, the Access Point name is incorrect, etc.
For details on the specific initialization error, use "AT+ERR?" to get the error code.
Although initialization fails, the cradle can still accept AT commands. In case of the
"ATDT" command, it will re-initialize before dialing out.
4) Dialing out
When in Dial mode (ATDT), the LED of Link will flash at the time interval of 0.3
seconds for about 20 seconds.
5) Connected
When in Dial mode (ATDT), the LED of Link will be green after successfully
establishing a connection.
6) Data Transmission
When in Dial mode (ATDT), the LED of Tx/Rx will flash as long as data transmission
occurs.
7) Download Ready
When in Download mode (AT+DOWNLOAD), the LEDs of Tx/Rx and Link will flash by
turns to indicate the cradle is ready.
8) Downloading
When in Download mode (AT+DOWNLOAD), the LEDs of Tx/Rx and Link will flash
simultaneously to indicate downloading is in progress.
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