ALLSAT COME2ASCOS, Quick Reference, Page: 22 / 26

Q
UICK
R
EFERENCE COME
2
ASCOS AND COME
2
ASCOS BLUE
21
Ensure that you have inserted a valid and configured SIM card and
connected a GSM antenna.
Integrate the come 2 ascos device into your system as shown in the
preceding chapter.
I
NITIALISATION
As soon as the come 2 ascos device is supplied with power, the initialisation
starts. This process lasts for about 10 to 20 seconds. The quality of the
GSM signal is checked and if not sufficient, the modem restarts.
R
EADY
A slow flashing yellow light indicates that the modem has registered at
GSM net. After another few seconds of internal initialisation the
come
2 ascos device is ready. In this state you can set the device into pause
mode or start the process of connecting by sending a GGA message.
C
ONNECTING AND
A
UTHENTICATION
After receiving a GGA message the come 2 ascos device starts connecting to
the reference service. This activity is indicated by the green LED. The
connecting procedure including the authentication lasts about one minute.
D
ATA
T
RANSMISSION
Both LEDs are constantly on. Correction data are being transmitted. If the
connection is disconnected because of low GSM signal or electromagnetic
interferences the come
2 ascos device might restart automatically. For
improving stability please read the chapter about “Performance
Optimization”.
In order to reduce GPRS costs you can stop the flow of correction data
temporarily by stopping the GGA output of your GNSS receiver or pushing
the button at the front of the device for 2 seconds. The flow of correction
data is activated again as soon as a new GGA message is received
respectively the button is pushed for 2 seconds. In GPRS mode the data
flow is resumed quickly within only a few seconds as the come
2 ascos
device stays online in pause mode.
Push the button for 5 seconds for shutting down into stand by mode.