Westermo GS-01 - Manual (Page 9)

9 6195-2201
Call control commands
D – Dial command
Command syntax: ATD <Numb> [I / i] [G/g] [;]
ATD> <PhbStr> [I / i] [G/g] [;]
ATD> mem <n> [I / i] [G/g] [;]
ATD> <PhbIndex> [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<nb> where <nb> 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<nb>; where <nb> 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 <speed> 10,11,12,13,14,15 if the calls succeeds, for data calls
only, <speed> 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