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4.2.2 07.07 GSM COMMANDS
AT+CBST
This command is used to select the line speed and the protocol for the DATA calls.
If Multistandard is selected:
-
when transmitting, the modem sets with the maximum speed available on the GSM network
(for Italy V.32 9600 bit/s)
when receiving the modem recognizes the speed and the protocol suggested from the remote
-
device.
For further information on AT+CBST command, see the chapter "Functional Examples".
Command
AT+CBST=<speed>,<mode>,<ce>
AT+CBST?
AT+CBST=?
Default: AT+CBST=0,0,1
<speed> <mode> <ce>
0
0
1
0
2
0
4
0
6
0
7
0
66
0
68
0
70
0
71
0
AT+CEER
This command gives a report with the cause of the last disconnection.
(See Appendix A for the error codes)
Command
AT+CEER
AT+CFUN
The AT+CFUN=1 command is used for a software reset of the modem; this means also a new
registration to the GSM network. Before carrying out a reset, we suggest to save the current
configuration (AT&W).
The AT+CFUN=0 or AT+CPOF commands are used to switch the modem in Stand-by mode:
during this phase the modem is disconnected from the GSM network.
To exit from the Stand-by mode use the AT+CFUN=1 command.
Command
AT+CFUN=0 (o AT+CPOF)
AT+CFUN=1
24
Line Speed Setting
Possible answers
OK / ERROR
+CBST: 0,0,1
+CBST: (0-7...), (0), ...
Description
1
Multistandard
1
V.21
300 bit/s
1
V.22
1200 bit/s
1
V.22 bis
2400 bit/s
1
V.32
4800 bit/s
1
V.32
9600 bit/s
1
V.110
1200 bit/s
1
V.110
2400 bit/s
1
V.110
4800 bit/s
1
V.110
9600 bit/s
Extended error report
Possible answers
+CEER: Error <err>
OK
Modem Restart
Possible answers
OK
OK
Action
Sets the speed and the protocol
Shows the current settings
Shows the available settings
No Transparent
No Transparent
No Transparent
No Transparent
No Transparent
No Transparent
No Transparent
No Transparent
No Transparent
Action
Cause of last disconnection
Action
Modem in Stand-by
Modem restart
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