AT Command Set

2.5 ATD Mobile originated call to dial a number

Execute command

ATD[<n>]

[<mgsm][;]

Reference

V.25ter/GSM

07.07

This command can be used to set up outgoing voice, data or fax calls. It also serves to control supplementary services.

Note:

The command may be aborted generally when receiving an ATH command during execution. It can´t be aborted in some connection setup states, such as hand- shaking. Different behaviour between voice and data call. Behaviour depends on parameter setting of AT^SM20. Voice call setup terminates immediately with OK. Data call setup terminates when call has been established.

Response

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

If successfully connected and non-voice call: CONNECT<text> TA switches to data state.

Note: <text> output only if +ATX parameter setting with value > 0.

When TA returns to command mode after call release:

OK

If successfully connected and voice call:

OK

Parameter

<n> String of dialling digits and optionally V.25ter modifiers (dialling digits): 0-9, * , #, +, A, B, C

V.25ter modifiers: these are ignored: ,(comma), T, P, !, W, @

Emergency call:

<n> = 112 worldwide number (no SIM needed) <mgsm> String of GSM modifiers:

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

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.

<;> Only required to set up voice calls. TA remains in command mode.

Note

Parameter ”l“ 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 and chapter 9.1.5 for <text>.

The *# codes can only be used with voice calls (i.e.if “;” is appended).

If ATD is used with a USSD command (e.g. ATD*100#;) an AT+CUSD=1 is executed implicitly (see AT+CUSD, pg. 122).

Parameter ‘G’ or ‘g’ will be ignored if Closed User Group was already activated, or accordingly, deactivated with AT+CCUG command.

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Siemens MC35 manual ATD Mobile originated call to dial a number

MC35 specifications

The Siemens MC35 is a compact and versatile modem designed primarily for mobile communication, data transmission, and machine-to-machine (M2M) applications. Launched in the early 2000s, it quickly became popular due to its blend of performance, reliability, and ease of integration, making it a solid choice for developers and businesses.

One of the key features of the MC35 is its support for GSM and GPRS technologies. This allows it to connect seamlessly to various networks, enabling users to transmit data at speeds that were impressive for its time. The GPRS capability can offer data rates of up to 171.2 kbps, allowing for efficient data transfer even in areas with limited connectivity.

The MC35 is designed to support both SMS and voice functionalities, making it adaptable for a range of applications. This includes remote monitoring, telemetry, and alarm signaling. The ability to send and receive SMS messages is a significant advantage for applications that require immediate alerts and notifications, enhancing its utility in security systems and industrial automation.

Furthermore, the modem is equipped with a range of interfaces, including serial communication (RS232), which makes it compatible with various hardware devices. This facilitates easy integration into existing systems, whether for industrial machinery or consumer electronics. Additionally, it features a robust software development kit (SDK), which enables developers to create custom applications tailored to their specific requirements.

Power consumption is another notable characteristic of the Siemens MC35. It is engineered to be energy-efficient, which is especially important for battery-operated devices or systems that require a prolonged operation without frequent recharging or maintenance.

In terms of physical characteristics, the MC35 is compact and lightweight, allowing it to fit into various enclosure designs without occupying much space. Its durability ensures it can perform reliably in different environments, making it suitable for outdoor and industrial applications.

To summarize, the Siemens MC35 stands out as a reliable modem with a rich feature set that includes GSM and GPRS support, SMS and voice capabilities, easy integration through various interface options, and energy-efficient operation. Its adaptability makes it a valuable tool for a wide array of communication and data transmission tasks, solidifying its place in the evolution of mobile communications technology.