Multi-Tech Systems GPRS (MTMMC-G) Benutzerhandbuch

Chapter 10 – Supplementary Services Commands  

Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 

81 

Description: 

This command allows control of the call barring supplementary service. Locking, unlocking or querying 
the status of call barring is possible for all classes or for a specific class, but not for a combination of 
some. 

“AO”, “OI”, “OX”     barring outgoing calls 
“AI”, “IR” 

barring incoming calls 

barring all calls (<mode>=0 only) 

 

Unlocks the facility 

Locks the facility 

Query status 

 

 

See description for the +CLCK command (Facility Lock) or +CCFC (Call forwarding). 

 

Note: A combination of different classes is not supported. It will only result in the 
activation/deactivation/status_request for all classes (7). 

 

Not active 

Active 

Syntax:    AT+CLCK= <fac>, <mode> [, <password> [, <class> ] ] 

Syntax:   (for <mode>=2 and command successful) 

+CLCK: <status> [, <class1> [ <CR><LF>+CLCK: <status>, <class2> [… ] ]

 

AT+CLCK=”AO”,1,1234 
  

OK 
Note: Command valid  

AT+CLCK=”AO”,0,5555 
  

+CME ERROR: 16 
Note: Wrong password 

AT+CLCK=”AO”,0,1234 
 

OK  
Note: Command valid  

 
 
 

Description: 

This command changes the supplementary service password.  

Values: 

<fac>  See +CLCK command with only “P2” facility added (SIM PIN2). 

 Note: Regardless of the specified facility, the change of password applies to barring all calls. 
 <OldPassword>, 

The password code is over 8 digits for P2 facility (4 to 8 digits)

 

 

  The password code is over 4 digits for other facilities (1 to 4 digits) 

Syntax:   

Command Syntax: AT+CPWD=<fac>,<OldPassword>,<NewPassword> 

AT+CPWD=”AO”,1234,5555 
Note: Change Call Barring password 

OK 
Note: Password changed 

AT+CPWD=”AO”,1234,5555 
Note: Change password 

+CME ERROR: 16 
Note: Wrong password 

AT+CPWD=”AO”,5555,1234 
Note: Change password 

OK  
Note: Password changed