| Buttons | Plastic tactile function buttons | Plastic tactile function buttons | 
                
                            |  | 20mm door release button | 20mm door release button | 
                
                            | Door Release | Momentary, Illuminated Green LED | Momentary, Illuminated Green LED | 
                
                            | Privacy | Momentary, Illuminated Red LED | Momentary, Illuminated Red LED | 
                
                            |  | 6 timeout settings (5mins to 12hrs) | 6 timeout settings (5mins to 12hrs) | 
                
                            |  | Can also be disabled or set to latch on/off | Can also be disabled or set to latch on/off | 
                
                            | Call Tone | Pulsed Tone with Volume Adjustment | Pulsed Tone with Volume Adjustment | 
                
                            |  | Muted Call Tone when privacy on | Muted Call Tone when privacy on | 
                
                            | Multi-Function | - | Momentary: Concierge, Callback, etc | 
                
                            | Volume | Pulsed Tone with Volume Adjustment | Pulsed Tone with Volume Adjustment | 
                
                            | Operating Voltage | 84dB SPL Max (at 1 metre) | 84dB SPL Max (at 1 metre) | 
                
                            | Power | ~0.01W Idle, 2.6W Active | ~0.01W Idle, 2.6W Active | 
                
                            | Power Consumption | 190mA during call tone | 190mA during call tone | 
                
                            |  | 9mA per lit LED (Privacy and/or Door Open) | 9mA per lit LED (Privacy and/or Door Open) | 
                
                            | Cable | CAT5 / CW1308 4 pair minimum (leaves 1 spare core) - Note: 3 pair can be used if Door Open LED function omitted | CAT5 / CW1308 4 pair minimum (leaves 1 spare core) - Note: 3 pair can be used if Door Open LED function omitted | 
                
                            | Connections | 11 Way Screw Terminals | 11 Way Screw Terminals | 
                
                            | Dimensions | (WxHxD) 96 x 206 x 49mm (approx. not including cable) | (WxHxD) 96 x 206 x 49mm (approx. not including cable) |