Telit Wireless Solutions GE863 Manuel D’Utilisation

GE863-GPS Software User Guide

1vv0300724 Rev. 2 - 24/01/07

2.7 Placing a CSD Data call (not GPRS)

Before a data call can be placed, it is recommended to check if the mobile is registered on a network
(see par. 2.5.3.1) and if the signal strength is enough to ensure that a call can be made.

2.7.1 Data call device set up

2.7.1.1 Set the device in data mode

• Send command

AT+FCLASS=0<cr>

• wait

for

response

TIP: The +FCLASS setting is maintained in memory, so there's no need to repeat this command
if +FCLASS setting is not changed.

2.7.1.2 Set the desired modulation and speed for the connection

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:

Command

Modulation

Speed

[bps]

Connection

Element

AT+CBST==0, 0, 1

Autobauding

----

non transparent

AT+CBST==1, 0, 1

V.21

300

non transparent

AT+CBST==2, 0, 1

V.22

1200

non transparent

AT+CBST==3, 0, 1

V.23

1200/75

non transparent

AT+CBST==4, 0, 1

V.22Bis

2400

non transparent

AT+CBST==6, 0, 1

V.32

4800

non transparent

AT+CBST==7, 0, 1

V.32

9600

non transparent

AT+CBST==14, 0, 1

V.34

14400

non transparent

AT+CBST==65, 0, 1

V.110

300

non transparent

AT+CBST==66, 0, 1

V.110

1200

non transparent

AT+CBST==68, 0, 1

V.110 / X.31

2400

non transparent

AT+CBST==70, 0, 1

V.110 / X.31

4800

non transparent

AT+CBST==71, 0, 1

V.110 / X.31

9600

non transparent

AT+CBST==75, 0, 1

V.110 / X.31

14400

non transparent

AT+CBST==1, 0, 0

V.21

300

transparent

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