Siemens TC37 Module At Command Reference page 80

AT Command Set
OK
Example 3 To activate call barring for outgoing international voice and data calls:
at+clck=oi,1,0000,3
OK
Example 4
To disable call barring for outgoing international fax (class 4) and SMS (class 8)
calls:
at+clck=oi,0,0000,12
OK
Example 5
To check whether actions in example 3 and 4 were successful, check the status
of barring for all outgoing international calls:
at+clck=oi,2,0000,15
+CLCK: 1,1
+CLCK: 1,2
+CLCK: 0,4
+CLCK: 0,8
OK
Example 6 To allow outgoing international calls without specifying classes:
at+clck=oi,0,0000,15
OK
To query status without specifying classes:
at+clck=oi,2
+CLCK: 0,1
+CLCK: 0,2
+CLCK: 0,4
To query status for all classes:
at+clck=oi,2,0000,255
+CLCK: 0,2
+CLCK: 0,1
+CLCK: 0,8
+CLCK: 0,4
+CLCK: 0,32
+CLCK: 0,16
+CLCK: 0,128
+CLCK: 0,64
OK
TC3X_ATC_01_V04.00
(where 3 is the sum of class 1 + class 2)
(where 12 is the sum of class 4 + class 8)
outgoing international voice calls barred
outgoing international data calls barred
outgoing international fax calls are allowed
outgoing international SMS are allowed
outgoing international voice calls allowed
outgoing international data calls allowed
outgoing international fax calls allowed
Page 80 of 204 29.05.2002