MC55 AT Command Set
7.3 ATD s
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MC55_ATC_V01.05 Page 141 of 469 2/10/04
Confidential / Released
Using ATD during an active call:
• When a user originates a second voice call whil there is already an act ive voice call, the first call will automat-
ically put on hold. The second call attempt is ackno wledged with "OK" immediately after dialing with ATD has
completed, without relation to a successful call setup. In case of failure, the addition al result codes "NO CAR-
RIER", "NO DIAL TONE", "NO CARRIER" will be presented afterwards (see exampl e below).
Parameter Description
String of dialing digits and optional V.25ter modifiers: 0-9, *, #, +, A, B , C
The following V.25ter modifiers are ignored: ,(comma), T, P, !, W ,@
Emergency call: <n> = 112 , 911 or 08, standardized GSM emergency number (no SIM needed).
String of GSM modifiers:
I Activates CLIR (disables presentation of own phone number to called part y)
i Deactivates CLIR (enables presentation of own phone number to called party )
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 an ATH command during execution. It cannot be
aborted in some connection setup states, such as handshaking.
• Parameter "I" and "i" only if no *#-code is within the dial string.
•<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 activate d, respectively deactivated with
AT+CCUG command before. Call by call invocation of CUG uses the settings provisioned by the prov ider 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 Anne x A:
After a predefined number of failed call attempts, the dialed num ber is entered into a read-only phonebook
called "blacklist" (phonebook "BL"). Call attempts to numbers contained in the blacklist will be barred by ME
and not signalled to the network.
An attempt to start a voice call to a barred phone number will be stopped with a CME ERROR 257 "Call
Barred".
An attempt to start a data or fax call to a barred phone number will be answered immediately with result code
"NO CARRIER".
The barred numbers are automatically removed from the blacklist ac cording to the timing conditions specified
in GSM02.07 Annex A.
<n>(text)
<mgsm>(str)