Multi-Tech Systems GPRS (MTMMC-G) 사용자 설명서

Chapter 6 – Network Service Commands 

  

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

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Description: 

This command is used by the application to ascertain the registration status of the product. 

Disable network registration unsolicited result code (

default) 

1   Enable network registration code result code +CREG: <stat> 
2   Enable network registration and location information unsolicited result code +CREG: 

<stat>,<lac>,<ci> if there is a change of network cell. 

0   Not registered, ME is not currently searching for a new operator. 
1   Registered, home network. 
2   Not registered, ME currently searching for a new operator to register to. 
3 Registration 

denied. 

4   Unknown. 
5   Registered, roaming. 

<lac>:  String type; two byte location area code in hexadecimal format (e.g., “00C3” equals 195 in 

decimal). 

<ci>:  String type; two byte cell ID in hexadecimal format. 

Command Syntax:   AT+CREG= <mode> 

Response syntax:   +CREG: <mode>, <stat> [ ,<lac>,<ci> ] for AT+CREG? Command only 

AT+CREG? 
 

+CREG: <mode>,<stat> 
OK 
Note: As defined here-above 

AT+CREG=0 
Note: Disable network registration unsolicited result code

OK 
Note: Command valid 

AT+CREG=1 
Note: Enable network registration unsolicited result code 

OK 
Note: Command valid 

AT+CREG=2 
Note: Enable network registration and location 
information unsolicited result code 

OK 
Note: Command valid 

AT+CREG=? +CREG: 

(0-2) 

Note: 0,1,2 <mode> values are supported 

 

 

 

Description: 

This command allows a new or modified operator to be added to the PLMN list. Up to 10 PLMNs can be 
created and stored in the flash memory. 

Please note that if two entries with the same network (MCC+MNC), but have different names, are 
entered, the first entry will be used. 

Delete

Write 

2 Read 

Location. If this parameter is not filled with <mode>=1, the location will be the first emply one. 

Operator in numeric format. 

The short name of the PLMN. 

The long name of the PLMN.