General
Product type	TK system module
Manufacturer	Telecom Behnke
Function	ELA connection (SIP/ a/b)
Interface	SIP/ a/b
Output level	200 mV
Output	NF transformer board
Colour	Silver
Level adjuster

The product Behnke 20-0040-BS is a TK system module for ELA connection (SIP/ a/b), developed for integrating telephone systems into existing ELA systems (Electronic Wiring Systems). It serves as an interface to establish communication between a SIP-based telephone system and an ELA system. The electronics are registered as a SIP subscriber at the telephone system and handle signal transmission. The connection is made via the SIP/ a/b interface, with the exact configuration adaptable to the respective system.

Applications
This module is specifically designed for use in industrial and commercial telecommunication systems, where a connection between modern IP-based systems and existing ELA infrastructures is required. It is typically used in buildings with a central telephone system, where the ELA system serves as the central interface for telephony. The application is in environments where a SIP-compatible telephone system must be connected to an ELA system to continue using the existing infrastructure.

Functions and Equipment in Detail
The module features a level adjuster, used for fine-tuning the output signal. In its delivered state, the level is approximately 200 mV, representing a standard output level for connecting to ELA systems. Adjustment is manual and allows adaptation to the specific requirements of the respective system. The output side of the module is equipped with a NF transformer board, which connects directly to the input of the on-site ELA system. This board ensures galvanic isolation and correct signal transmission in the NF range.

Technology Explained Simply
The SIP technology (Session Initiation Protocol) enables control of communication connections over IP networks. The module functions as a SIP subscriber, registering with the telephone system and establishing a connection to an ELA system. The ELA system (Electronic Wiring System) is a classic system for distributing telephony and signals in buildings. The NF transformer board ensures that the signal is transmitted in the low-frequency range (typically voice frequencies) without interference or galvanic connections. The level setting is crucial to ensure clear and interference-free transmission, with an output level of approximately 200 mV being a common standard value.

Compatibility and Accessories
The module is designed for use with SIP-compatible telephone systems and ELA systems. It is specifically designed for connection via the SIP/ a/b interface, enabling a direct link between both systems. Connection is made via the designated terminals on the telephone system and the ELA system.

Installation and Mounting
Installation is performed by connecting to the SIP telephone system and the ELA system. The NF transformer board is connected directly to the input of the ELA system. The level setting can be manually adjusted according to the system requirements. No additional tools or components are required, as the module is designed as a standalone device. Mounting typically occurs in the enclosure or near the telephone system, depending on installation specifications.

Operational Advantages
The module enables the use of existing ELA infrastructure without requiring a complete migration to an IP-based system. Integration via SIP allows for modern and flexible communication control. The manual level adjustment ensures optimal signal transmission, and the NF transformer board guarantees interference-free and galvanically isolated connection. The module's color is silver, providing a neutral and professional appearance.