The Orno 903 FOSSA is a two-wire audio intercom system consisting of a flush-mount external panel and two surface-mount indoor uniphones. The external panel has an aluminium front, accommodates two call buttons, and includes a backlit nameplate area. The duplex audio transmission supports a full two-way conversation without switching delays.

The system connects directly to a 230V supply and can control an electric door strike without an additional transformer. Each uniphone is individually protected by a fuse. The system is expandable: it accepts one additional indoor device beyond the two included. Surface-mount installation is also possible using the optional protective rain cover OR-DOM-RL-901DN.

Key Features

• Wired audio intercom, duplex transmission
• Nominal voltage: 230V
• Cable configuration: 2+2
• External panel: flush-mount, 2 call buttons, aluminium front, backlit nameplate
• Indoor uniphone: surface-mount, 1 ringtone, white plastic, with handset
• Direct electric strike control — no transformer required
• Expandable: accepts 1 additional indoor unit
• Each uniphone protected by a fuse
• Optional surface-mount cover: OR-DOM-RL-901DN (grey) or OR-DOM-RL-901DN/B (black)

Product Benefits

• Duplex audio allows both parties to speak and hear simultaneously, avoiding the half-duplex press-to-talk delay found on simpler systems
• Direct electric strike control eliminates the cost and installation work of a separate strike transformer
• Flush-mount external panel sits flush with the wall surface for a clean, recessed appearance at the building entrance
• Expandability to a third indoor device allows coverage of an additional room without replacing the external panel
• Individual fuse protection on each uniphone prevents a single fault from disabling the entire system
• Backlit nameplate makes it easy for visitors to identify the correct call button in low-light conditions

Technical Specifications

• Model: Orno 903 FOSSA
• Transmission Type: Wired, duplex
• Nominal Voltage: 230V
• Number of Cables: 2+2
• Indoor Unit — Mounting: Surface mount
• Indoor Unit — Ringtones: 1
• Indoor Unit — Material: Plastic
• Indoor Unit — Colour: White
• Indoor Unit — Width: 98 mm
• Indoor Unit — Height: 215 mm
• Indoor Unit — Depth: 68 mm
• External Panel — Call Buttons: 2
• External Panel — Mounting: Flush mount
• External Panel — Cover: Yes
• External Panel — Front Material: Aluminium
• External Panel — Width: 116 mm
• External Panel — Height: 200 mm
• External Panel — Depth: 54 mm
• Flush Box Width: 100 mm
• Flush Box Height: 165 mm
• Flush Box Depth: 40 mm

Why You'll Love It

• 230V direct connection means the system is wired like a standard appliance — no low-voltage power supply or separate transformer is needed on site
• Aluminium external panel front resists corrosion and provides a professional appearance at the building entrance
• The 2+2 cable configuration is straightforward to route and terminate, reducing installation time compared to multi-wire systems
• White indoor uniphones blend with standard interior wall finishes without requiring painting or covers