LBB 1956/00 Plena
Bosch LBB 1956/00 Plena Voice Alarm Call Station: A reliable, six-zone call station for efficient emergency communication in schools, offices, and public spaces. Increase your public address system with this stylish and durable Bosch solution.
Key Features
- Six zone selection keys, all-call key and momentary PTT-key for calls
- Selectable gain, speech filter, limiter, and output level for improved intelligibility
- LED indications for zone selection, fault, and emergency state
- Call station extension provides seven additional zone and zone group keys
- Stylish six‐zone call station for the Plena Voice Alarm System
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Description
LBB 1956/00 Plena Voice Alarm Call Station
Increase our public address system with the Bosch LBB 1956/00 Plena Voice Alarm Call Station. This stylish and reliable call station offers six-zone selection, all-call functionality, and clear audio for efficient emergency communication. Ideal for schools, offices, and public spaces, this Bosch Plena Voice Alarm system component ensures safety and security.
The LBB 1956/00 is a high-quality call station designed for professional use, featuring:
- Elegant Build: A sturdy metal base, a flexible microphone stem, and a unidirectional condenser microphone.
- Versatile Installation: Suitable for tabletop use or flush-mounted neatly into desktops.
- Zone Communication: Supports calls to up to six zones or all zones simultaneously in the Plena Voice Alarm System.
LBB 1956/00 Functions
This call station features selectable gain, a selectable speech filter, and a limiter for improved intelligibility. The call station has a balanced line level output, making it possible to position it up to 1000 meters from the controller, using CAT‐5 extension cables. With shielded cable, the call station can also be used in an EMC level 5 (heavy industry) environment. DIP switches at the base of the call station select different microphone gain levels, the call station ID, and the speech filter. A service accessible rotary control provides microphone level attenuation. LEDs on the call station show which zones have been selected. Three additional LEDs give visible feedback on the active state of the microphone and the system.
Each call station supports six zone selections. The number of selectable zones or zone groups can be increased by connecting call station keypads (LBB 1957/00). Up to eight keypads can be added with each keypad adding seven zone or zone-group keys.
Green flashing means standby (chime is sounding). Green indicates microphone active. Amber indicates that the system has detected a fault, and red indicates that the system is in the emergency state. Controls and indicators
• Four status LEDs
• PTT‐key
• PTT status LED
• Six zone selection keys
• Six zone selection LEDs
• All‐call key
• Eight DIP switches
Specifications
- Brand Name: Bosch
- Manufacturer Part Number: LBB1956/00
- Product Name: Plena Voice Alarm
- Base dimensions: 40 x 100 x 235 mm (1.57 x 3.97 x 9.25 in)
- Weight: Approx. 1 kg
- Mounting: Standalone
- Color: Charcoal with silver
- Stem length with mic: 390 mm (15.35 in)
- Cable length: 5 m (16.4 ft)
- Operating temperature: -10 oC to +45 oC (14 oF to +113 oF)
- Storage temperature: -40 oC to +70 oC (-40 oF to +158 oF)
- Relative humidity: <95%
- Voltage range: 24 VDC supplied by LBB 1990/00 (or 18 to 24 VDC or VAC external power supply)
- Current consumption: <30 mA (plus <15 mA per keypad)
- Nominal sensitivity: 85 dB SPL (gain preset 0 dB)
- Nominal output level: 700 mV
- Input sound level (max): 110 dB SPL
- Gain preset: +6 / 0 / -15 dB
- Limiter threshold: 2 V
- Compression ratio limiter: 1:20
- Distortion: <0.6% (maximum input)
- Input noise level (equiv.): 25 dB SPLA
- Frequency response: 100 Hz to 16 kHz
- Speech filter: -3dB at 315 Hz, high-pass, 6 dB/oct
- Output impedance: 200 ohm
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