TFS-Dialog 400 Intercom Auerswald

The Auerswald TFS-Dialog 400 intercom is an ultra-flat, surface-mounted door station designed for analogue extension (a/b) inputs of telephone systems. Constructed from safety glass and plastic with IP44 protection and CE certification, it provides outdoor-capable communication and control while fitting systems from Auerswald and other manufacturers, including AVM Fritz!Box and Alcatel/Avaya/Unify systems. The unit measures 140 mm × 28 mm × 220 mm and includes energy-efficient LED illumination and multiple relay contacts for door control functions.

Advantages

The TFS-Dialog 400 supports simple integration into existing telephone systems and benefits from a ready-made template when used with Auerswald ICT systems. Configuration is performed via a smartphone app (Android and iOS) for quick programming of phone numbers, functions and the number of call buttons. Its illuminated sensor field replaces mechanical keys, is operable with gloved or bare fingers, and includes a numeric code lock (4–8 digits) for keyless access. Additional relay contacts, indirect ambient lighting and selectable sensitivity settings make the unit adaptable to different installation environments. The device’s slim profile is achieved despite a 6 mm safety glass front that resists scratches and breakage.

Suitable for

• Surface-mounted installations on residential or commercial entrances
• Integration with analogue a/b ports of ICT systems and consumer routers (e.g., Fritz!Box)
• Sites requiring keyless access via numeric codes
• Installations needing additional relay-controlled functions (door opener, hallway light, extra bell)

Key specifications

• Brand: Auerswald, Model: TFS-Dialog 400 (MPN 90167, EAN 4019377901670)
• Dimensions: 140 mm (W) × 28 mm (D) × 220 mm (H)
• Protection class: IP44; Certification: CE
• Material: safety glass front (6 mm) and plastic housing
• Connection: analogue a/b port compatibility
• Lighting: indirect rear white LEDs (requires additional bell transformer)
• Controls: illuminated sensor field, numeric code lock (4–8 digits)
• Extras: three relay contacts; optional Auerswald a/b switch module supported

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 or compatible router. If using an Auerswald ICT system, load the provided template to simplify setup. Configure phone numbers, call-button assignments and other functions with the Auerswald smartphone app (Android or iOS) and transfer settings to the intercom. If you require ambient lighting or additional bell functions, connect a suitable bell transformer and any door contact sensors or relay-driven devices (e.g., door opener). Select the appropriate sensitivity level on the device for noisy or quiet environments.

Usage recommendations

For reliable operation, mount the unit in a sheltered position where possible, use the app to back up configuration after programming, and install a door contact to enable the intelligent "door open" detection that stops incoming calls when access is granted.