AT Command Set

2 Standard V.25ter AT Commands

These AT Commands are related to ITU-T (International Telecommunication Union, Telecommunica- tion sector) V.25ter document.

MC35 supports the registers S0-S29. You can change S0,S3,S4,S5,S6,S7,S8,S10,S18 by using the appropriate ATSn commands. All the other registers are read-only and for internal usage only!

2.1A/ Repeat previous command line

Execute command Response

A/

Repeats previous command line. Line does not need to end with terminating

 

character.

 

Parameter

Reference

V.25ter

Note

•After beginning with the character “a“ or „A“, a second character “t“ ,”T“ or “/“ has to follow. In case of using a wrong second character, it is necessary to start again with character “a“ or “A“.

•If autobauding is active (see +IPR, pg. 38) A/ (and a/) cannot be used.

2.2+++ Switch from data mode or PPP online mode to command mode

Execute command Response

+++This command is only available during a CSD call or a GPRS connection. The

+++ character sequence causes the TA to cancel the data flow over the AT in- terface and switch to command mode. This allows you to enter AT commands while maintaining the data connection to the remote device or, accordingly, the GPRS connection.

 

OK

 

To prevent the +++ escape sequence from being misinterpreted as data, it must

 

be preceded and followed by a pause of at least 1000 ms. The +++ characters

 

must be entered in quick succession, all within 1000 ms.

 

 

Reference

Note:

V.25ter

• To return from command mode to data or PPP online mode: Enter ATO as de-

scribed in Chapter 2.17.

 

 

 

MC35_ATC_01_V04.00

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02.04.2002

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Siemens MC35 manual A/ Repeat previous command line, +++ Switch from data mode or PPP online mode to command mode
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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.
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