Intercom bus telephone S. Siedle & Soehne BTC 850-02 W white IP54 for indoor use

S. Siedle & Soehne BTC 850-02 W is a compact white intercom bus telephone designed for indoor installations requiring splash and dust resistance. The unit provides a wall-mounted voice interface for driver-to-passenger and inter-vehicle communications within public-transport vehicles or vehicle terminals. With an IP54 rating, the handset and housing are protected against limited dust ingress and splashing water, making the device suitable for demanding indoor transport environments and service areas where robustness and clear voice transmission are required.

Advantages

The BTC 850-02 W offers a space-saving design with straightforward mounting that integrates into existing Siedle systems. Its IP54 protection ensures reliable operation in environments prone to moisture or particulate exposure without compromising speech clarity. The white finish provides a neutral appearance for interior vehicle cabins or station areas, while the handset and controls are optimized for frequent use and intuitive operation by drivers and staff.

Suitable for

• Driver-to-passenger communication inside buses, trams and coaches
• Inter-vehicle voice links and depot communication points
• Indoor station or terminal communication points exposed to splashes or dust
• Retrofit or new installations compatible with Siedle bus systems

Key specifications

• Form factor: compact wall-mounted intercom handset
• Protection class: IP54 (splash and limited dust resistance)
• Color: white
• Intended environment: indoor transport and terminal use
• Audio: voice communication handset optimized for speech clarity
• Compatibility: designed for connection to Siedle bus communication systems

How to use

Install the BTC 850-02 W on a vertical surface using appropriate mounting hardware and wiring practices for the vehicle or indoor installation. Connect the unit to the Siedle bus system following the manufacturer's wiring scheme and ensure power and bus lines meet system specifications. Use the handset for direct voice calls between driver and passengers or between vehicle units; operate controls according to system configuration to initiate and end calls. Perform a functional test after installation to verify clear audio, correct signaling and stable connection on the bus network.

Usage recommendations

Place the device where it is easily reachable by operators and protected from direct spray zones; for cleaning, use a damp cloth and avoid high-pressure water jets. Schedule periodic checks of wiring connections and handset condition to maintain reliable voice communication in transport environments.