MC75 AT Command Set

MC75 AT Command Set
5.4 AT+CLCK
s
64 dedicated packet access
128 dedicated PAD access
1...[7]...255 combination of some of the above classes.
For example, the default setting 7 represents the sum of the integers 1, 2 and
4 (voice, data and fax).
The value 255 covers all classes.
If parameter "class" is omitted, the default value 7 is used.
Notes
• The AT+CLCK command offers the full range of parameters according to the GSM specifications.
However, when you attempt to use a service option which is not provisioned or not yet subscribed to, the setting
will not take effect regardless of the response returned.
The responses in these cases vary with the network (for example "OK", "Operation not allowed", "Operation
not supported" etc.). To make sure check the extended error response with AT+CEER and the lock status with
=2.
• The command has been implemented with the full set of parameters according to GSM 07.07. For
actual applicability of a desired Call barring service to a specific service or service group (a specific
value) please consult table A.1 of GSM 02.04.
• If an outgoing Fax or Data Call is rejected due to an active ''call barring'' supplementary service, the call will
be terminated with result code NO CARRIER.
Under the same conditions, an outgoing Voice call will be terminated with result code NO DIALTONE.
• If an invalid is entered several times in succession, a delay incremented after each failed
attempt will increase the time to wait before the input of the is accepted. To avoid blocking the
serial interface the running AT+CLCK command is aborted after a short timeout and returns CME ERROR 100
("unknown"). If then the AT+CLCK command is issued once again execution is denied with CME ERROR 256
("Operation temporary not allowed"). For details regarding the delay see Section 5.1.1, What to do if PIN or
password authentication fails?.
• If the user tries to set a lock although it is already active or, the other way round, tries to unlock an inactive
lock, the response will be OK, but the will not be checked or verified.
• In the airplane mode the write command version for the network related (AO, OI, OX, AI, IR,
AB, AG and AC) is not supported. For remaining facilities the command is fully functional then.
Examples
EXAMPLE 1
Lock SIM card (= "SC")
AT+CLCK="SC",1,"9999"
OK
AT+CLCK="SC",0,"9999"
OK
The "SC" parameter enables or disables the SIM PIN authentication
(PIN 1) when you power up the GSM engine
SIM card locked. As a result, SIM PIN 1 must be entered to enable ME
to register to the GSM network.
Unlocks SIM card.
When powered up, ME registers to the GSM network without requesting
SIM PIN1.
Note: Depending on the services offered by the provider, this feature is
not supported by all SIM card types. If so, the command returns ERROR
when you attempt to unlock the card.
To query the status of the SIM card lock:
AT+CLCK="SC",2
Query the status of SIM card lock.
+CLCK: 1
SIM card is locked. SIM PIN1 must be entered to enable ME to register
to the GSM network.
OK
MC75_ATC_V01.001 Page 115 of 475 6/2/05
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