LBB1956/00 microphone call station

LBB1956/00 Microphone Call Station

LBB1956/00 is a dedicated call station for the Bosch Plena Public Address and Voice Alarm System. With its modern, robust design and flexible expansion capabilities, this product is the ideal choice for industrial, commercial, office building and other projects requiring a professional sound alarm system.

Key Features

• Call up to 6 audio zones and support for “All Call” key
• Push-To-Talk (PTT) key and clear status indicator
• Superior voice quality thanks to selectable amplifier, voice filter and audio limiter
• LEDs for operation status, zone selection, error and emergency alerts
• Flexible microphone body design, unidirectional condenser mic
• Flexible expansion with LBB 1957/00 sub-keyboard – supports 7 additional zones, up to 56 zones

Technical Specifications

• Power & Performance
• Power Supply: 24 VDC (from LBB 1990/00 or external power supply)
• Current Consumption:
• Maximum Input Level: 110 dB SPL
• Sensitivity: 85 dB SPL (preset 0 dB)
• Frequency response: 100 Hz – 16 kHz
• Distortion: <0.6%
• Threshold: 2 V
• Voice filter: High-pass at 315 Hz, slope 6 dB/octave
• Communication & Control
• Connectivity: 2 RJ45 ports, 24 VDC input, expansion keypad port
• Controls:
• 6 zone selection keys + All-call key
• PTT key and status indicator
• 4 status LEDs (standby, active, fault, emergency)
• Microphone volume control
• 8 DIP switches for ID, filter, gain settings
• Bosch Plena LBB 1956/00 Voice Alarm Call Station