16.4.99

appendix.fm5

Gigaset V.24 Adapter dt/eng:A30853-X400-B104-3-74D1

Why set a mode? Technical background

Serial interfaces are more than plug-in connections. They have an integrated data flow control, control lines, data lines and an adjustable speed function. Serial interfaces are used for trans- porting data in various formats.

Modems are usually controlled with AT commands or company- specific protocols commands that they receive via their serial in- terface. On the basis of these AT or AVM/Eumex commands, modems can recognise the format and speed at which the data is transmitted. The automatic recognition of transmission pa- rameters is important and must be emulated by the radio link if a device that understands these commands is used for param- eter adjustment and is connected to the Partnerstation.

A cordless extension cable between a PC and, for example, a modem must detect the transmission parameters to be used at the PC interface for communication between this interface and the modem. On the modem side, the functions generated by the PC must also be created for the serial interface.

On the radio link, data is transferred according to a radio protocol that has nothing to do with the serial interface.

If a device which cannot detect transmission parameters in the same way as a modem is connected to the Partnerstation, "Di- rect connection" is selected as the operating mode.

There are thus five possible operating modes for each Gigaset

M101 Data:

1.Direct connection: this operating mode is implemented for all devices that are not controlled with AT or AVM/Eumex commands.

2.AT or AVM/Eumex commands, local: this is the operating

mode for the lokale Station: the local Gigaset M101 Data de- termines the conditions on the serial interface in the same way as a modem and transmits data as well as information to the Partnerstation on the transmission parameters to be used for entering this data in the terminal.

3.AT or AVM/Eumex commands, remote: in this operating mode, the Partnerstation controls a terminal that under- stands the AT commands.

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Siemens M101, RS232 operating instructions Why set a mode? Technical background
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M101, RS232 specifications

The Siemens RS232 M101 is a notable communication interface device that is widely utilized in industrial applications for data transfer between machines and control systems. Its introduction marked a significant advancement in serial communication technology, allowing for efficient and reliable connectivity in a variety of environments.

One of the primary features of the Siemens RS232 M101 is its adherence to the RS232 standard, which defines the protocols for serial communication. This standard ensures compatibility with a wide range of devices, making it versatile for use in various applications. The M101 facilitates point-to-point communication, enabling direct data exchange between two devices, such as computers, programmable logic controllers (PLCs), and sensors, which is crucial for real-time monitoring and control processes.

The technology behind the M101 includes its ability to support baud rates of up to 115,200 bps, enabling high-speed data transfer. This capability is essential in environments where timely data exchange is critical, such as manufacturing and automation sectors. The device also features a robust design that ensures reliable operation even in challenging industrial conditions, including temperature variations and electromagnetic interference.

Additionally, the Siemens RS232 M101 supports flow control mechanisms such as RTS/CTS (Request to Send/Clear to Send) and XON/XOFF (software flow control), which help manage data transmission effectively. By preventing data loss due to buffer overruns, these technologies enhance the integrity of data being transmitted, providing users with confidence in the reliability of their systems.

The M101 interface is compatible with a variety of operating systems, which simplifies integration into existing setups. Furthermore, it includes diagnostic LEDs that indicate communication status, making troubleshooting straightforward and user-friendly.

In summary, the Siemens RS232 M101 is a pivotal component in industrial communication, characterized by its adherence to RS232 standards, high-speed data transfer capabilities, robust build, and effective flow control mechanisms. Its widespread compatibility and user-friendly features make it a valuable tool for ensuring seamless communication between different systems in industrial applications. By facilitating reliable data exchange, the M101 enhances operational efficiency and contributes to the overall effectiveness of automated processes.
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