Fermax VDS Extra LOFT Telephone with Magnet for Easy Hanging

Fermax F-3391 VDS Extra LOFT Audio Door Entry Telephone

The Fermax F-3391 is a wall-mounted audio handset telephone for VDS digital door entry systems. The Extra variant builds on the Basic model by adding two installer-assignable function buttons (F1 and F2) for additional features such as stairwell lighting or second door release.

Made from impact-resistant ABS plastic with a textured finish for easy cleaning and UV protection, the handset includes an internal magnet ensuring secure positioning on the base unit. The VDS 3-wire bus eliminates individual call wires per dwelling, with call routing handled digitally by the VDS amplifier.

Key Features

• VDS digital bus system compatible (3-wire)
• Combined door release and guard unit call button
• Two additional programmable function buttons (F1, F2)
• Internal magnet for secure handset positioning
• Two selectable electronic call tones
• Three-position volume switch (Off / Low / Full)
• LED status indicator
• Apartment door call pushbutton input (P1)
• Extension call connection for call prolongator (ref. 2040)
• Conversation privacy as standard
• Maximum conversation time: 90 seconds
• Maximum ring time: 30 seconds

Technical Specifications

• Power supply: 16-20 Vdc (18 Vdc nominal)
• Current draw standby: 6 mA
• Current draw call: 215 mA
• Current draw audio active: 11 mA
• Speaker: 1.75 inch, 16 Ohm
• Microphone: Electret, 50 Ohm dynamic resistance
• Operating temperature: -10 to +60 degrees C
• F1/F2 max current: 50 mA at 12 Vdc
• Mounting type: Wall mount, screw-on surface assembly
• Wiring: +, - (18 Vdc power), L (data and audio), T/- (apartment door call P1), A/+ (extension call), F1, F2