• Redundant network connection
• Connections for status LEDs
• Connection for microphone and loudspeaker
• Connection for keypads
• Stable metal enclosure

The call station module is used to make custom‚Äëmade call stations with the same functionality as the LBB 4430/00 Call Station Basic. The module is powered from the Praesideo network but an external power supply can also be connected. Two supervised control inputs can accept power supply status information from the external power supply. The PRS-CSM can be extended with up to 16 keypads (LBB 4432/00 or PRS-CSKPM) each with eight programmable keys. Extension with a numeric keypad (PRS-CSNKP) is also possible.

Functions
The call station module has a limiter and a speech filter. This improves intelligibility and prevents clipping of the audio. A potentiometer for volume control of the monitoring speaker and the headset can be connected. When it plays a chime or a pre-recorded message this can be monitored via a connected loudspeaker or headphone. The call station module has its own DSP for audio processing functions including sensitivity adjustment limiting and parametric equalization.

Up to 16 call station keypads can connect to the station via a serial communication link. The call station provides the power for the keypads. Up to 224 priorities can be assigned. All configuration is done via the Praesideo network controller.

The call station module is fully supervised and supports fail-safe operation. Even if the Praesideo network controller fails the call station is still able to put through emergency calls.

Controls and indicators
These must be supplied by the installer.

Interconnections
• Two network connectors (system bus)
• Backup power supply input and 2 control inputs
• Serial data and power supply interface for call station keypads
• Loudspeaker
• Headset
• Buzzer
• Volume control for loudspeaker/headset
• Control input (for Press-to-Talk button)
• Five control outputs (for status LEDs)