AT Command

Description

AT+CBST selects the bearer service of the data call.
Possible values of connection element are,
0          data circuit asynchronous (UDI or 3.1 kHz modem)
1          data circuit synchronous (UDI or 3.1 kHz modem)
2          PAD Access (asynchronous) (UDI)
3          Packet Access (synchronous) (UDI)
4          data circuit asynchronous (RDI)
5          data circuit synchronous (RDI)
6          PAD Access (asynchronous) (RDI)
7          Packet Access (synchronous) (RDI)

Usage
Command Possible response(s)
+CBST=[[,[,]]]
+CBST? +CBST: ,,
+CBST=? +CBST: (list of supporteds),(list of supporteds),(list of supporteds)

Examples

AT+CBST?
+CBST: 7,0,1

OK
AT+CBST=?
+CBST: (0-7,12,14,65,66,68,70,71,75),(0),(0-3)

OK

KeywordsAT+CBST syntax, examples, parameters, error, input, response.

Test AT+CBST command with AT Command Tester





Try this script included in AT Command Tester Tool.

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

//Script-at_cbst.at

//Test AT+CBST AT command

//AT+CBST command is used to select bearer service type

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

 

//List of supported responses

//TA selects the bearer service <name> with data rate <speed>,

//and the connection element <ce> to be used when data calls are originated.

AT+CBST=?

 

//WAIT for 1 sec

WAIT=1

 

//Query the current setting

AT+CBST?

 

//WAIT for 1 sec

WAIT=1

 

//Speed - 9600,name - Data circuit asynchronous (UDI), connection elecment is non-transparent

AT+CBST=71,0,1

 

//WAIT for 1 sec

WAIT=1

 

//Query to check our settings

AT+CBST?

 

//WAIT for 1 sec

WAIT=1


Output of above script in AT Command Tester Tool.

AT+CBST=?

+CBST: (0,7,12,14,16,17,39,43,48,51,71,75,80,81,83,84,116,134),(0,1,4),(0,1)

 

OK

 

AT+CBST?

+CBST: 0,0,1

 

OK

 

Speed ->autobauding

Bearer Service -> Data circuit asynchronous

Connection Element -> Non transparent

 

AT+CBST=71,0,1

OK

 

AT+CBST?

+CBST: 71,0,1

 

OK

Speed -> 71

Bearer Service -> Data circuit asynchronous

Connection Element -> Non transparent