User guide
Table Of Contents
- Presentation
- Warning
- Copyright
- 1 References
- 2 Packaging
- 3 General presentation
- 4 Characteristics and Services
- 5 Use of the modem
- 5.1 Starting with the modem
- 5.2 Specific recommendations for the use of the modem in vehicles
- 5.3 GSM led of the modem
- 5.4 Echo function of AT commands deactivated
- 5.5 Checking the quality of the GSM reception signal
- 5.6 Verification of PIN code
- 5.7 Verification of modem registration on GSM network
- 5.8 Verification of modem registration on GPRS network
- 5.9 Verification of internal voltages of the modem
- 5.10 Main AT commands (HAYES)
- 5.11 Turning OFF the modem
- 5.12 Updating procedure of the modem
- 6 Trouble Shooting
- 7 Functional description
- 8 Technical characteristics
- 8.1 Mechanical characteristics
- 8.2 Electrical characteristics
- 8.3 Environmental characteristics
- 8.4 Standards/Conformities
- 9 Security recommendations
- 10 Recommended accessories
- 11 Client support
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Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCO & GENER reserves the right to make any modification.
Dct_427_01
5.7 Verification of modem registration on GSM network
1. Ensure that a valid SIM card has been inserted in the SIM card reader of the modem.
2. Using a communication software like HyperTerminal, enter the following AT commands:
a. AT+CPIN="xxxx" to enter the PIN code. The user has only 3 attempts to enter the PIN code.
After the third attempt, only a second code (PUK code) supplied by the operator, will allow you
to choose a new PIN code.
b. AT+CREG? to check the registration status on the GSM network. The response will be of the
following format: +CREG : <mode>, <stat> with:
<Mode> = configuration of the registration message not solicited
<Stat> = registration status
3. Check the registration status according to the value returned in the table below.
Table 10 : Verification of registration on GSM network
Command Response Interpretation
AT+CREG?
+CREG : 0,0
The modem is not recognized by the
network.
+CREG : 0,2 or 0,3
The modem is searching for a network
operator.
+CREG : 0,1
The modem is attached in GSM to the
local operator.
+CREG : 0,5
The modem is attached in GSM to the
roaming operator.
If the modem is not registered, check:
- the connection between the modem and the antenna
- the reception level of the signal (cf. §5.5 Checking the quality of the GSM reception signal).
For more information about the AT commands, see the document "u-blox_AT_Commands_Manual_xxx.pdf"