WM_PRJ_M12_UGD_001 - 002
18th September 2003
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4.4 Verifying the network registration of the modem
1. Make sure a valid SIM card has been previously inserted in the SIM card
holder of the modem.
2. Using a communication software such as HyperTerminal program, enter
the following AT command:
AT+CREG?. Value appears as a response.
3. Verify the result with the values given in the table below.
Table 12:
Values of network registration
Value(*) Network
registration
0,1 Yes
0,5
Yes (registered roaming)
(*) refer to AT commands documentation [1] for further information about the
other returned values and their meaning.
If the modem is not registered, perform the following procedure:
Check the connection between the modem and the antenna.
Verify the signal strength to determine the strength of the received signal
(refer to paragraph 4.3).
