MC55 AT Command Set

7.3 ATD

s

mobile

7.3

ATD Mobile originated call to dial a number

Syntax

Exec Command

ATD<n>[<mgsm>][;]

Response(s)

If no dialtone (parameter setting ATX2 or ATX4):

NO DIALTONE

If busy (parameter setting ATX3 or ATX4):

BUSY

If a connection cannot be set up:

NO CARRIER

OK

If successfully connected and non-voice call (TA switches to online data mode):

CONNECT <text>

When TA returns to command mode after call release:

OK

If successfully connected and voice call:

OK

PIN ASC0 ASC1 MUX1 MUX2 MUX3

￿ ￿ ￿ ￿ ￿ ￿

Reference(s)

V.25ter

Command Description

This command can be used to set up outgoing voice, data or fax calls. It also serves to control Supplementary Services. The termination character ";" is mandatory to set up voice calls or to send *# codes for Supplementary Services. It must not be used for data and fax calls.

Additional notes on the responses returned after dialing with ATD:

For voice calls, you have the choice of two different response modes that can be selected with AT^SM20: AT^SM20=1 (factory default) causes the ME to respond once the call setup is completed either successfully ("OK") or unsuccessfully ("NO CARRIER", "NO DIAL TONE", "BUSY").

AT^SM20=0 causes the ME to return "OK" immediately after dialing was completed (i.e. before call setup ter- minates successfully or unsuccessfully).

For data connections, call setup always terminates when the call has been established (indicated by the result code "CONNECT <text>), or when it fails (indicated by "NO CARRIER"). The settings of AT^SM20 do not apply.

Different call release indications:

Upon termination, an outgoing fax or data call may show a different result code than a voice call would show under identical conditions. In order to track down the actual reason for call termination, AT+CEER or ATS18 should be used for all applicable connections.

MC55_ATC_V01.05

Page 140 of 469

2/10/04

Confidential / Released

 

 

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Siemens MC55 manual ATDnmgsm, No Dialtone, Connect text