General
Number of S0 ports	4
Compatibility	all COMmander systems
Revision	III

The Auerswald COMmander Module 4 S0, REV. III is an expansion module for the COMmander telephone system family. It enables the integration of four S0 ports, each of which can be used for connecting analog telephone lines or ISDN basic rate interfaces. The module is intended for all COMmander systems, including Commander Basic and Commander Business, and serves to expand the connection capacity of the respective system. The designation REV. III refers to the third revision of the module, which includes technical adaptations and improvements compared to earlier versions.

Applications
This module is used in companies and facilities that require an extension of their existing COMmander system with analog or ISDN connections. It is particularly suitable for small to medium-sized offices that have existing telephone lines and wish to integrate them into the digital system. The S0 ports allow the connection of analog telephones, modems, or other analog end devices, with the option to select the specific function for each port individually. Compatibility with all COMmander systems makes the module flexible and usable regardless of the specific system variant.

Functions and Equipment in Detail
The module provides four S0 interfaces, each of which can be configured as an analog telephone line or an ISDN basic rate interface. Configuration is performed via the system control, allowing individual setting of the function for each port. The S0 interface is a standard interface for connecting to the public telephone network in Germany, enabling the use of analog devices and integration into ISDN networks. The module is designed as an expansion module and is installed into the system to increase connection options.

Technology Explained Simply
The S0 interface is a digital interface used in the German ISDN network. It enables the transmission of voice, data, and control information over a single cable. The module uses this interface to enable the connection of analog end devices by appropriately converting the signals. The designation REV. III indicates a technical advancement, which may include improvements in signal processing, stability, or compatibility with newer system versions. The module is optimized for use in the COMmander family and works with the internal control and communication protocols of the system.

Compatibility and Accessories
The module is intended for all COMmander systems, including Commander Basic and Commander Business. It is therefore usable regardless of the specific system variant. Compatibility with the Commander Basic 2 is explicitly mentioned, indicating that the module also functions in this specific system variant. Integration is direct into the system, without requiring additional adapters or converters.

Mounting and Installation
Mounting is done by inserting the module into the appropriate slot in the COMmander system. Installation requires no additional tools or special preparations. The system automatically recognizes the module, and configuration of the S0 ports is performed via the system control. The exact procedure for configuration is described in the operating manual of the respective COMmander system.

Advantages in Operation
The module enables flexible expansion of connection options without replacing the existing system. Using S0 ports allows analog devices to continue being used while also benefiting from the advantages of the digital system. The configurable ports allow individual adaptation to specific requirements. Compatibility with all COMmander systems increases flexibility and reduces the need to use different module types for different systems. The REV. III version represents a technically up-to-date variant that is compatible with newer system versions.