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GX GSM

DRAFT: function & product not released yet.

Trouble shooting

	Step	Details
1	Power	Check that the blue LED is either lit continuous or blinking
2	USB	The modem must be connected to USB, and visible in the Settings → GSM modem menu
3	Simcard	(feature is still being added to the software)
4	Signal strength	15 or higher (and see below table)
5	Network

Antenna reception interpretation

Even when there is no simcard inserted, you can check signal strength.

0 = -113 dBm or less
1 = -111 dBm
2 = -109 .. -53 dBm
31 = - 51dBm
99 = not known or not detectable

-50 to -75 dBm: high signal
-76 to 90 dBm: medium signal
-91 to -100: low signal
-101 to -120 dBm poor signal

You also need to remember that an outdoor antenna typically increases received signal by 15 dB to 25 dB. (verify)

TODO: replace above by something meaning full, ie indicate the signal strenght to the user in such way that he doesn't need to memorize rssi or other tables.