Bosch Communications Systems

With the release of Bosch Praesideo SW Version 3.1 new additional hardware is introduced such as 4- and 8- channel Basic Amplifiers, a call stacker, a numeric keypad and a PC Callstation. These new devices will further enhance Praesideo's position in this competitive market by giving customers more flexibility in design and a more optimal and cost-effective solution. Praesideo is therefore ideal for medium and large applications such as shopping centres, schools, tunnels, multi purpose sports stadia and airports.

Call Stacker

This stand-alone device is connected to the Praesideo system bus via two network connections only. The unit is used to record calls to occupied zones and automatically playback the recorded calls when the zones are free. The unit also offers the possibility of time-shifted broadcast of calls to eliminate acoustic feedback. Call stacking and time shifting are typically used at airports, in industrial plants and in offshore applications.

Numeric Keypad

The new numeric keypad is used to password protect call stations and for easy zone selection. The unit connects to standard Praesideo call stations and contains a numeric keypad and LCD with backlight. User access is via a user number and PIN code. An access lock is activated after a predefined time or by a so-called hot key when the user leaves the call station. Further zone selection functionality enables the user to make calls in predefined zones or zone groups.

Basic Amplifiers

The basic amplifiers are cost effective alternatives to the regular Praesideo power amplifiers, for situations where no built-in digital signal processing functions, such as equalisers, delay and AVC are required. they do not have a Praesideo network connection. Instead, these amplifiers are connected to the Praesideo network via the PRS-16MCI Multi Channel Interface, which provides the basic amplifier with audio signals and has a full control.