Siemens MC55 manual Mgsmstr

MC55 AT Command Set

7.3 ATD

Using ATD during an active call:

s

mobile

•When a user originates a second voice call whil there is already an active voice call, the first call will automat- ically put on hold. The second call attempt is acknowledged with "OK" immediately after dialing with ATD has completed, without relation to a successful call setup. In case of failure, the additional result codes "NO CAR- RIER", "NO DIAL TONE", "NO CARRIER" will be presented afterwards (see example below).

Parameter Description

<n>(text)

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).

<mgsm>(str)

String of GSM modifiers:

I Activates CLIR (disables presentation of own phone number to called party)

iDeactivates 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 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:

After a predefined number of failed call attempts, the dialed number 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 according to the timing conditions specified in GSM02.07 Annex A.

MC55_ATC_V01.05	Page 141 of 469	2/10/04
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