EG_GenPro425e_1103_UG_001_UK.docx
Descriptions and non-contractual illustrations in this document are given as an indication only.
ercogener reserves the right to make any modifications.
Dct_427_02
5.5 Verification of PIN code
The PIN code is necessary to make a call or to accept a response coming from the cellular network. This
code is held in the SIM card and can be modified by the user.
To check that the PIN code has been entered, use a communication software like HyperTerminal, and enter
the command AT+CPIN?
The table below shows the main responses given by the modem:
Table 37 : Verification of PIN code
The SIM card is absent or not
recognized
The PIN code is wrong or not entered
yet
Enter the PIN code with the AT command AT+CPIN="xxxx"
The user has only 3 attempts to enter the PIN code. After the third attempt, only a second code (code PUK)
supplied by the operator, will allow you to choose a new PIN code.
5.6 Checking the quality of the cellular reception signal
The modem will be able to make a call only if the received signal is powerful enough.
To verify the reception level, the SIM card must be inserted and the PIN code entered.
The command AT+CESQ allows to know the reception level of the signal sent by the closest cellular Base
Transceiver Station (BTS).
This level is given when modem is attached to the network. The modem is attached to the network when
answer to AT+COPS? command is provided.
To check the level of the received cellular signal, do the following operations:
Use a communication software like Hyperterminal.
Enter the commands AT+COPS?
The response +COPS : <mode>,<format>,”Operator”,Act>
As long as response is +COPS : 0 send again command AT+COPS?
When the modem is attached, the answer looks like +COPS : 0,0,"FirstOne",7
Act = 0, 1 or 3, the modem is attached to 2G network
Act = 2, 4, 5 or 6, the modem is attached to 3G network
Act= 7, the modem is attached to 4G network
Enter command AT+CESQ?
The answer is +CESQ : <rxlev>,<ber>,<rscp>,<ecn0>,<rsrq>,<rsrp>
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