Technical reference section

Setting up and clearing down connections

Once you have read through this section, you will be able to use your GSM module to- gether with your communication program to perform the following functions:

Interrupt a connection using the escape command.

Go off-hook.

Set up a connection by manually dialing the telephone number.

Store a telephone number.

Dial a stored telephone number.

Answer a call.

Switch to auto-answer.

Operating modes

The GSM module operates in two different modes:

Command mode

Transparent mode

Command mode

When you switch on your system, the GSM module is in command mode and is ready to receive and execute your commands. All characters that the GSM module receives via the COM interface in this mode are interpreted as commands and, if a phone con- nection is present, are not transferred to the distant station.

Transparent mode

In transparent mode, the GSM module transfers every character sent and received via the COM interface just as it is.

Escape command

Before attempting to dial your first call, you must know how to interrupt or disconnect a call at any time. This involves the following two steps:

Enter ￿￿￿ to switch to command mode.

Disconnect the call by entering ATH.

Example:

Situation: The GSM module is operating in transparent mode, i.e. a connection is set up to a distant station.

Change to command mode:

Do not press any key for at least one second.

Press the ￿ key three times in rapid succession (within one second).

Do not press another key for at least one second.

The GSM module switches to command mode, i.e. it interrupts the flow of data and

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Siemens M1 manual Operating modes, Command mode, Transparent mode, Escape command

M1 specifications

The Siemens M1 is a prominent urban transit solution designed for efficient and sustainable public transportation systems. This innovative metro train has become a staple in various metropolitan areas, known for its balance of performance, safety, and passenger comfort.

One of the key features of the Siemens M1 is its modular design, which allows for flexibility in configuration depending on specific transit needs. The train typically consists of multiple carriages that can be adjusted for length and capacity, accommodating different passenger volumes while minimizing operational costs. This adaptability makes the M1 ideal for growing urban environments where ridership numbers can fluctuate.

The Siemens M1 is built with advanced technologies that enhance its operational efficiency. It utilizes a lightweight construction, primarily through the use of aluminum, which reduces energy consumption while still maintaining structural integrity and safety standards. The train is also equipped with cutting-edge traction systems that ensure smooth acceleration and fast braking, resulting in a comfortable ride for passengers.

Safety is a paramount concern in transit systems, and the M1 incorporates various safety technologies. It features advanced signaling systems that enhance communication between trains and trackside equipment. Moreover, the train is designed with anti-collision measures and real-time monitoring systems that can detect faults before they lead to service disruptions.

Passenger comfort is another critical aspect of the Siemens M1 design. The interiors are spacious and feature modern seating arrangements, allowing for easy movement within the train. Large windows provide natural light and views of the outside environment, contributing to a more pleasant travel experience. The train also offers features like climate control, information displays, and accessibility options for passengers with reduced mobility.

Environmental sustainability is an integral part of the Siemens M1’s design. It is tailored to reduce carbon emissions, featuring energy-efficient systems that lower the overall ecological footprint. Additionally, the train can be integrated with renewable energy sources, further promoting green public transport initiatives.

Overall, the Siemens M1 stands out as a versatile and efficient urban transit option, combining modern technology and design principles that cater to the needs of both operators and passengers. With its focus on safety, comfort, and sustainability, the Siemens M1 continues to play a vital role in shaping the future of urban mobility.