CalAmp LandCell SMC-GPRS Series, User Manual

Page: 20 / 84

001-0004-829 Rev00
Page 20 of 84
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The SIM card can be used to store a Personal Idetification Number (PIN) to authenticate users on
the network.
The AT+CPIN write command can be used to enter one of the passwords listed below. The read
command can be used to check whether or not the ME is waiting for a password, or which type of
password is required.
This may be for example the SIM PIN1 to register to the GSM network, or the SIM PUK1 to replace a
disabled SIM PIN1 with a new one, or the PH-SIM PIN if the client has taken precautions for
preventing damage in the event of loss or theft etc. If requested by the ME AT+CPIN may also be
used for the SIM PIN2 or SIM PUK2. If no PIN1 request is pending (for example if PIN1
authentication has been done and the same PIN1 is entered again) SMC modem responds "+CME
ERROR: operation not allowed"; no further action is required.
Each time a password is entered with AT+CPIN the module starts reading data from the SIM. The
duration of reading varies with the SIM card. This may cause a delay of several seconds before all
commands which need access to SIM data are effective.
AT+CPIN=<pin>[, <new pin>]
<pin>: Password (string type), usually SIM PIN1. If the requested password was a Pin Unlock Code
(PUK), such as SIM PUK1 or PH-FSIM PUK or another password, then <pin> must be followed by
<new pin>.
<new pin>: If the requested code was a PUK: specify a new password or restore the former disabled
password. See section “What to do if PIN or password authentication fails?” for more information
about when you may need to enter the PUK.
Successful PIN authentication only confirms that the entered PIN was recognized and correct. The
output of the result code OK does not necessarily imply that the mobile is registered to the desired
network. Typical example: PIN was entered and accepted with OK, but the ME fails to register to the
network. This may be due to missing network coverage, denied network access with currently used
SIM card, no valid roaming agreement between home network and currently available operators etc.
The SMC modem offers various options to verify the present status of network registration: For
example, the AT+COPS command indicates the currently used network. With AT+CREG you can also
check the current status and activate an unsolicited result code which appears whenever the status
of the network registration changes (e.g. when the ME is powered up, or when the network cell
changes).
The <pin> and <new pin> can also be entered in quotation marks (e.g. "1234").
To check the number of remaining attempts to enter the passwords use the AT^SPIC command.
See AT+CPWD and AT^SPWD for information on passwords.
See AT+CLCK and AT^SLCK for information on lock types.