User's Manual Part 1

AT Commands 57
P/N 90023363 Revision 1.8
If the connection is busy, the modem will return the string:
BUSY
where the command ATX has been set to 3 or 4.
If the connection cannot be established, the modem will return the string:
NO CARRIER
If the connection is successful and is non-voice call, the modem switches
to data state and the modem will return the string:
CONNECT<text>
where <text> is only displayed if the command ATX has been set to a value
greater than 0.
If connection successful and is a voice call, the modem will return the
string:
OK
When the modem releases the call and returns to command mode, it
returns the string:
OK
Example:
ATDFD1<cr> DATA CALL TO FD PHONE BOOK ENTRY
ATDLD3<cr> DATA CALL TO LD PHONE BOOK ENTRY
ATDDC2I;<cr> VOICE CALL TO DC PHONE BOOK ENTRY 2 NO CLIR
ATD[<ploc>][<mgsm>]
Description: DIAL NUMBER FROM INTERNAL MEMORY
This command will instruct the modem to originate a call to a dialable
number
Syntax: ATD[<ploc>][<mgsm>]<cr>
Parameters:
ploc is an integer referring to a mobile equipment phone number
stored at the specified location in the modem’s internal
memory.
mgsm is a string of GSM modifiers, where:
I overrides the current Calling Line Identification
Restriction (CLIR) setting for the call
G,g displays the Closed User Group (CUG) information, set
with the command +CCUG
; signifies the call is a voice call and instructs the modem
to return to the command mode.