Westermo GS-01 - Manual (Page 9)

9 6195-2201
Call control commands
D – Dial command
Command syntax: ATD [I / i] [G/g] [;]
ATD> [I / i] [G/g] [;]
ATD> mem [I / i] [G/g] [;]
ATD> [I / i] [G/g] [;]
The ATD command is used to establish a speech, data or fax call.
For a data or fax call, the application sends to the GSM module the following ASCII
string: (the bearer has to be selected before with the +CBST command)
ATD where is the called phone number.
For a voice call, the application sends to the GSM module the following ASCII string:
(the bearer has to be selected before, if not a default bearer is used)
ATD; where is the called phone number.
Please, notice that in case of international number, the local international prefix has not
to be set (usually 00) but need to be replaced by the ”+” character.
Example: to establish a voice call to Wavecom from another country,
the AT command shall be:
ATD+33146290800;
Notice that some countries can have particular numbering rules for their GSM handset
numbering.
The answer to the ATD command can be one of the following ones:
Verbose result code Numeric (V0 set) Description
OK 0 if the calls succeeds, for voice
call only
CONNECT 10,11,12,13,14,15 if the calls succeeds, for data calls
only, takes the value
negotiated by the GSM module
BUSY 7 if the called party is already in
communication
NO ANSWER 8 if no hang up is detected
after a fixed network time-out
NO CARRIER 3 Call setup failed or remote user
release. Use the AT+CEER
command to know the failure
cause