User Manual

The data connection can be made using different modulations at different speeds. This
connection mode can be selected with the command +CBST. The syntax for the command is:
AT+CBST=<mod>,0,<ce>
These parameters can be selected as seen in the table:
<WCDMA network>
Command
Modulation
Speed
[bps]
Connection Element
AT+CBST=0,0,1
V.32
9600
non transparent
AT+CBST=14,0,1
V.34
14400
non transparent
AT+CBST=16,0,1
V.34
28800
non transparent
AT+CBST=17,0,1
V.34
33600
non transparent
AT+CBST=43,0,1
V.120
14400
non transparent
AT+CBST=48,0,1
V.120
28800
non transparent
AT+CBST=51,0,1
V.120
56000
non transparent
AT+CBST=75,0,1
V.110/ X.31
14400
non transparent
AT+CBST=80,0,1
V.110 / X.31
28800
non transparent
AT+CBST=81,0,1
V.110 / X.31
38400
non transparent
AT+CBST=83,0,1
V.110/ X.31
56000
non transparent
AT+CBST=83,4,1
V.110/ X.31
56000 RDI
non transparent
AT+CBST=84,0,1
X.31
64000
non transparent
AT+CBST=116,1,0
Bit transparent
64000
transparent
AT+CBST=134,1,0
multimedia
64000
transparent
<GSM network>
Command
Modulation
Speed
[bps]
Connection Element
AT+CBST=0,0,1
V.32
9600
non transparent
AT+CBST=7,0,1
V.32
9600
non transparent
AT+CBST=12,0,1
V.34
9600
non transparent
AT+CBST=14,0,1
V.34
14400
non transparent
AT+CBST=39,0,1
V.120
9600
non transparent
AT+CBST=43,0,1
V.120
14400
non transparent
AT+CBST=71,0,1
V110/ X.31
9600
non transparent
AT+CBST=75,0,1
V.110/ X.31
14400
non transparent
AT+CBST=7,0,0
V.32
9600
transparent
AT+CBST=12,0,0
V.34
9600
transparent
AT+CBST=14,0,0
V.34
14400
transparent
Once selected the appropriate <mod > and <ce> parameters from the table:
 send command AT+CBST=<mod>,0,<ce><cr>
 wait for OK response