BGS2T AT Command Set
7.3 ATD
BGS2T_ATC_V01.301 Page 140 of 554 1/31/12
c
Parameter Description
String of dialing digits and optional V.250 modifiers: 0-9, *, #, +, A, B, C, D and p
The following V.250 modifiers are ignored: ,(comma), T, !, W ,@
DTMF transmission: If the dial string <n> contains the call modifier "p" the digits after this call modifier till the
end are handled as DTMF tones, which are transmitted at connect state for voice calls. The command returns
OK after the transmission of DTMF tones has been completed, even if the call is already connected. When
encountering the DTMF separator subsequently, the module will insert a pause.
String of GSM modifiers:
I Activates CLIR (disables presentation of own phone number to called party, if no *#31#-code is within the
dial string)
i Deactivates CLIR (enables presentation of own phone number to called party, if no *#31#-code is within the
dial string)
G Activate Closed User Group explicit invocation for this call only.
g Deactivate Closed User Group explicit invocation for this call only.
Notes
• The command may be aborted generally when receiving a character during execution. It cannot be aborted
in some connection setup states, such as handshaking.
• <mgsm> is not supported for data calls.
• <n> is default for last number that can be dialled by ATDL.
• See also ATX for <text>.
• If ATD is used with a USSD command (e.g. ATD*100#;) an AT+CUSD=1 is executed implicitly (see AT+CUSD).
• Parameter 'G' or 'g' will be ignored if Closed User Group was already activated, respectively deactivated with
AT+CCUG command before. Call by call invocation of CUG uses the settings provisioned by the provider or,
if available, the settings of the parameters <index> and <info> made with AT+CCUG.
• The ME is equipped with a "Blacklist" function according to GSM02.07 Annex A. The handling of failed call
attempts follows the timing restrictions specified there. When the maximum number of failed call attempts is
reached the number will be blacklisted. Call attempts to blacklisted numbers will be barred by the ME and not
signalled to the network.
An attempt to start a voice call to a barred phone number is denied with a "+CME ERROR: call barred".
An attempt to start a data or fax call to a barred phone number is denied with "NO CARRIER".
According to GSM02.07 Annex A, the barred numbers will be removed from the blacklist after a call attempt
was successful or after module restart.
• Emergency calls:
If no SIM is inserted, call numbers 000, 08, 110, 112, 118,119, 911 and 999 cause an emergency call setup.
If a SIM with ECC file is inserted, 112 and 911 and all additional call numbers stored in the ECC file cause an
emergency call setup.
If a SIM without or empty ECC file is inserted, call numbers 112 and 911 and in addition all call numbers spec-
ified with AT^SCFG, "Call/ECC", parameter <ecc> will cause an emergency call setup.
Example
Th
e following example shows the call setup procedure when a call is already active and a second call attempt
fails because the line of the called party is busy:
<n>
(text)
<mgsm>
(str)
ATD03012345678;
Dialing out the first party's number.
OK
The first call is established.
ATD03022222222;
The number of the second party is dialed.
OK
The response "OK" is issued immediately though no call is established
(same behavior as is you had chosen AT^SM20=0.)
BUSY
Line of the second called party is busy.
To Next Page
Loading...
Need help?
General
