> 7.19 | AT+CBST Select bearer service type

> The AT+CBST write command selects the bearer service <name>, the data rate <speed> and the connection element <ce> to be used when data calls are originated. The settings also apply to mobile terminated data calls, especially when single numbering scheme calls or calls from analog devices are received (see AT+CSNS). See GSM 02.02[1] for a list of allowed combinations of subparameters.
> Syntax

> Test Command AT+CBST=?
> Response(s)
> +CBST: (list of supported<speed>s), (list of supported<name>s), (list of supported<ce>s)
> OK

> Read Command AT+CBST?
> Response(s)
> +CBST: <speed>, <name>, <ce>
> OK

> Write Command AT+CBST=<speed>[, <name>[, <ce>]]
> Response(s)
> OK
> ERROR

> Reference(s) |  | PIN |  | ASC0 | ASC1 | USB | MUX1 | MUX2 | MUX3 |  |  | Charge | Q | Last
> GSM 07.07 |  | - |  | + | - | + | + | - | - |  |  | - | + | -

> Parameter Description

> <speed>(num)(&W)(&V)

> 0
> Autobauding
> 1
> 300 bps (V.21)
> 2
> 1200 bps (V.22)
> 4
> 2400 bps (V.22bis)
> 6
> 4800 bps (V.32)
> [7](&F)
> 9600 bps (V.32)
> 14
> 14400 bps (V.34)
> 65
> 300 bps (V.110)
> 66
> 1200 bps (V.110)
> 68
> 2400 bps (V.110)
> 70
> 4800 bps (V.110)
> 71
> 9600 bps (V.110)
> 75
> 14400 bps (V.110)

> <name>(num)(&W)

> 0(&F)
> Asynchronous modem

> <ce>(num)(&W)

> Transparent mode is not supported.
> 1(&F)
> Non-transparent
> Note

> • | If problems are encountered with CSD connections at 14.4 kbit/s you may be required to change the Fixed Network User Rate depending on the network. See AT^SFNUR for details.