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5. USING THE COMMANDS
5.1 SETTING UP THE G20 (POWER ON AND INITIAL ACTIONS)
There are three phases of connectivity for the g20:
• Init General
In this phase, the g20 is asked to provide basic information which ensures that the phone is functioning properly.
• Enabling the SIM
• Registering the SIM on a network in order to see that wireless access is functioning properly.
After these three phases are completed, g20 is ready for action and you can send/receive voice calls, circuit switched data and
GPRS.
The following figure shows the phone connectivity phases:
Figure 17. Phone Connectivity Phases
Init-General
Init Phone
ReadyNo Coverage
oice
CSD DataGPRS
Communication=OK, ID is known
Sim card=OK, Registered to network
Coverage Indication
Remote/Local
Connected/Disconnected
Remote/Local
Connected/Disconnected