Multi-Tech Systems GPRS (MTMMC-G) Benutzerhandbuch

Chapter 5 – Call Control Commands 

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

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Direct Dialing from a Phonebook (stored in the SIM card) can be performed with the following commands: 

to call <index> from the selected phonebook (by the +CPBS command)  

to call “BILL” from the selected phonebook 

ATD> mem <index>   allows direct dialing from a phonebook number 

<mem> is 

SM, LD, MC, ME, RC, MT or SN.  

See +CPBS command   

ATD<nb>[<I>][;]

ATD>[<mem>]<index>[<I>][;] 
ATD>[<mem>]<name>[<I>][;] 

AT+CPBS? 
Note: Which phonebook is selected ? 

+CPBS:”SM”,8,10 
Note: ADN phonebook is selected, 8 
locations are used and 10 locations are 
available 

ATD>SM6; 
Note: Call index 6 from AND phonebook  

OK  
Note: Call succeeds 

 When 

the 

FDN phonebook has been locked, only numbers beginning with the digits of FDN 

phonebook entries can be called.  

 

For example, if “014629” is entered in the FDN phonebook all the phone numbers beginning with these 
6 digits can be called.  

 The 

CLIR supplementary service subscription can be overridden for this call only. 

 

“I” means “invocation” (restrict CLI presentation).  

 

“i” means “suppression” (allow CLI presentation). 

 

Control of CUG supplementary service information by 

“G” or “g” is allowed for this call only. The 

index and info values set with the +CCUG command are used.  

 

An outgoing call attempt could be refused if the AOC service is active and credit has expired (NO 
CARRIER).  

 

When trying to set up an outgoing call while there is an active call, the active call is first 

put on hold, 

then the call set up is carried out.  

 

As per GSM 02.30, GSM sequences may be controlled using dial commands. These sequences can 
contain 

“*”, “#”, but “;” is forbidden.  

 

If the sequence is not supported or fails, +CME ERROR: <err> is returned. In the case, where the FDN 
phonebook is activated, the sequences concerning call forwarding are allowed only if they are written in 
the FDN. See Codes and Values Appendix for the list of supported sequences. 

ATD*#21# 
Note: Check any call forwarding status  

+CCFC: 0,7 
Note: No call forwarding  

ATD**61*+33146290800**25# 
Note: Register call forwarding on no reply, with no reply 
timer fixed at 25 s.  

OK  
Note: done 

ATD*2# 
Note: Bad sequence  

+CME ERROR 3  

 

 

Description: 

The ATH (or ATH0) command disconnects the remote user. In the case of multiple calls, all calls are 
released (active, on-hold and waiting calls).  The specific ATH1 command has been appended to 
disconnect the current outgoing call, only in dialing or alerting state (i.e., ATH1 can be used only after 
the ATD command, and before its terminal response (OK, NO CARRIER, ...)   

It can be useful in the case of multiple calls. 

0  Ask for disconnection (default value) 
1  Ask for outgoing call disconnection 

Syntax:   

ATH<n> 

ATH 
Note: Ask for disconnection  

OK 
Note: Every call, if any, is released  

ATH1 
Note: Ask for outgoing call disconnection 

OK  
Note: Outgoing call, if any, is released