Intercom Auerswald TFS-Dialog 400 Black

The Auerswald TFS-Dialog 400 Black is an analogue door intercom designed for connection to an a/b extension port of telephone systems, including Auerswald ICT, AVM Fritz!Box and Alcatel/Avaya/Unify systems. Its slim surface-mounted housing combines safety glass and plastic, offers IP44 protection and CE certification, and measures 140 × 28 × 220 mm. The device supports remote configuration via smartphone app (Android and iOS) and provides LED-illuminated sensor operation, a numeric code lock, ambient backlighting and additional relay contacts for door opener or auxiliary devices.

Advantages

The TFS-Dialog 400 connects to a standard analogue a/b port and includes an Auerswald template for quick setup on Auerswald ICT systems. Configuration of phone numbers, functions and call buttons is done conveniently via a smartphone app and transmitted to the door terminal. The illuminated sensor field replaces mechanical keys and works reliably in varied conditions, while the numeric code lock allows keyless access with a 4–8 digit code. Indirect ambient lighting and selectable sensitivity levels improve usability in low light and noisy environments. The unit also provides three additional relay contacts for controlling a door opener, hallway light or an extra bell (requires bell transformer).

Suitable for

• Residential entrances where analogue telephone system integration is required
• Small offices and commercial premises with AVM, Alcatel/Avaya/Unify or Auerswald systems
• Locations needing slim, surface-mounted intercoms with IP44 protection

Key specifications

• Connection: analogue a/b extension port (ICT systems, Fritz!Box, etc.)
• Dimensions: 140 mm (W) × 28 mm (D) × 220 mm (H)
• Protection class: IP44; Certification: CE
• Housing: safety glass front (6 mm) and plastic
• Configuration: smartphone app (Android and iOS)
• Features: illuminated sensor field, numeric code lock (4–8 digits), indirect ambient lighting
• Additional outputs: three relay contacts (requires bell transformer for some functions)

How to use

Install the TFS-Dialog 400 as a surface-mounted unit and connect it to an analogue a/b port of your telephone system. If using an Auerswald ICT system, apply the provided template to simplify configuration. Install a bell transformer if you want to use ambient backlighting or additional bell-related functions. Use the smartphone app to program phone numbers, functions and the number of call buttons; transfer settings to the door terminal and update them as needed. Optionally connect a door contact (not included) to enable intelligent “door open” detection that stops incoming ringing when the door is opened.

Usage recommendations

For noisy locations choose the higher sensitivity setting; for quiet environments select the lower setting. Use a dedicated bell transformer when enabling ambient lighting or additional bell outputs. For full functionality with extra switching tasks consider the optional Auerswald a/b switch module.