Aiphone LEF-3 Open Voice 3 Call Master Station

The Aiphone LEF-3 is a 3-call open voice selective calling master station supporting up to 4 total stations in any combination of master and sub stations. It is part of the LEF series audio intercom range.

Aiphone LEF-3 3 Call Selective Calling Audio Master Station

Incoming calls from sub or door stations are annunciated with a momentary electronic tone and an LED indicator that remains lit for approximately 20 seconds. Communication at the calling master is press-to-talk, release-to-listen, while the responding station operates hands-free.

The privacy feature on the master and selected sub stations prevents monitoring from the master station. The LEF-3 supports selective monitoring and is compatible with LE-A, LE-D, LE-DA and LS series sub and door stations. It can be wired in 2-wire configuration to door stations with the shorting link attached, or 3-wire for intermixed systems. The unit also supports external 8 or 20 ohm speakers via NP-25V capacitors and foot pedal operation.

Key Features

• Up to 4 stations in any master/sub combination
• Selective calling to individual stations
• LED and tone annunciation for incoming calls
• Press-to-talk at master, hands-free at responding station
• Privacy button to prevent monitoring
• Selective monitoring
• 2-wire or 3-wire connection options
• Supports external 8 or 20 ohm speakers
• Foot pedal operation supported
• Voice and call tone volume controls

Technical Specifications

• Terminals: 1, 2, 3, C, E, R, Y, +, -
• Power consumption: 300 mA
• Power supply: 12 V DC via PS-1208UL
• Output: 800 mW at 20 ohms (reception), 500 mW at 20 ohms (transmission)
• Communication: Press-to-talk, release-to-listen at master; hands-free at sub
• Talk channel: 1 talkpath with occupied LED
• Capacity: Up to 4 stations, intermixable
• Mounting: Wall or desk mount
• Compatible speakers: 8 or 20 ohm (up to 3 speakers)
• Capacitor: NP-25V, 33 uFd, 25 V, non-polarised