User manual

Wavecom GSM Modem

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7. AT commands for data

7.1. Bearer type selection +CBST

The syntax of the command is AT+CBST=<speed>,0,<ce>

The selection of the bearer impacts both incoming and outgoing calls.

No data compression is provided and only asynchronous modem is

supported.

<speed> Modem type transmission mode

0 :autobauding None asynchronous MODEM

4 :2400 bps, V22bis asynchronous MODEM

5 :2400 bps V26ter asynchronous MODEM

6 :4800 bps V32 asynchronous MODEM

7 :9600 bps V32 asynchronous MODEM

68 :2400 bps V110 asynchronous MODEM

70 :4800 bps V110 asynchronous MODEM

71 :9600 bps V110 asynchronous MODEM

<ce> connection element

0 Transparent only

1 Non transparent only

100 Transparent preferred

101 Non transparent preferred

Application to GSM AT+CBST=7,0,1 ask for a bearer

GSM to application OK bearer supported

Application to GSM AT+CBST=81,0,0 ask for a bearer