AT Command Set
MC35_ATC_01_V05.00 Page 90 of 256 15.07.2002
<class> integer or sum of integers each representing a <class> of information:
1 voice
2 data
4 fax
8 short message service
16 data circuit sync
32 data circuit async
64 dedicated packet access
128 dedicated PAD access
x combination of some of the above classes.
For example, the default setting 7 represents the sum of the
integers 1, 2 and 4 (call barring for voice, data and fax). The
value 255 covers all classes. If the <class> parameter is
omitted, the default value 7 is used.
See examples in 4.21.3 for correct handling of class numbers .
<class> 2 (data) comprises all those <class> values between 16 and
128, that are supported both by the network and the MS. This means,
a setting made for <class> 2 applies to all remaining data classes (if
supported). In addition, you can assign a different setting to a specif ic
class. For example, you can activate call barring for all data classes,
but deactivate it for a specific data class.
<status> 0 off
1 on
Reference
GSM 07.07
GSM 02.04,
GSM 02.88
Note
The command has been implemented with the full set of <class> param eters
according to GSM 07.07. For actual applicability of a specif ic <fac> to a specific
service or service group (a specific <class> value) please c onsult table A.1 of
GSM 02.04.
4.21.1 Examples: Enabling / disabling PIN 1 authentication
Example 1
To lock or unlock the SIM card: The "SC" parameter enables or d isables the
SIM PIN authentication (PIN 1) when you power up the GSM engine:
AT+CLCK="SC",1,9999 Activates SIM card lock.
OK As a result, SIM PIN 1 must be entered to en-
able ME to register to the GSM network.
AT+CLCK="SC",0,9999 Unlocks SIM card.
OK 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.
Example 2 To query the status of the SIM card lock:
AT+CLCK="SC",2
+clck: 1 SIM card is locked. SIM PIN1 must be entered
to enable ME to register to the GSM network.