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The power of the Public IV counter intercom

All functions of the Public III intercom , but also much more!

Of course, the Public IV also works in the open-full-duplex mode which means that no switch of the direction of the sound is made. This avoids disturbing effects of cutting off conversations.

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Digital signal processing (DSP)

The Public IV counter-intercom is a fully equipped couter intercom system. 

The intercom has digital sound processing capabilities, the DSP-module provides features such as: 

  • Noise gate: switching off the microphone on the visitors side if there is no talk

  • Automatic echo suppression

  • Noise reduction: actively suppressing disturbing sounds

All options became standard

  • Push-to-talk (PTT) mode: as with a walkie-talkie, at the service side one has to press the button if one wants to talk

  • Boost mode: permanently amplifying the sound on the operated side.

  • The headphone connection has became standard.

  • A control output (open drain) is equipped to control a relay to open a door or barrier.

  • The volume settings of the headphones and table-top-unit can be set up separately and stored using the + and - buttons on the table-top-unit.

  • Connection for a foot switch that can control the PTT function

Basic layout

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Fragile Box

What's in the box

  • A microphone/loudspeaker table unit (40.054.440.001) with central functions on the servce side

  • A surface-mounted microphone (40.005.020) with 3.5 m cable

  • A surface-mount speaker with stainless steel housing (40.006.106)  

  • 5 m speaker cable 

  • The Installation manual

  • RJ45 + RJ10 connection box (40.054.305.001)

  • Power supply unit, GPP10 medically certified, 110-240VAC (40.054.803.002)

  • The necessary plugs and screws

Basic kits


Public IV kit 1

Public IV kit1.jpg
  • 40.054.440,table top/central unit

  • 40.005.020, directional microphone

  • 40.006.106, surface mount speaker, stainless steel

Public IV kit 2

Public IV kit2.jpg
  • 40.054.440, table top/central unit

  • 40.005.020, directional microphone

  • 40.006.102, flush mount speaker

Public IV kit 3

Public IV kit3.jpg
  • 40.054.440, table top/central unit

  • 40.005.017, omnidir. microphone

  • 40.006.106, surface mount speaker, stainless steel

Public IV kit 4

Public IV kit4.jpg
  • 40.054.440, table top/central unit

  • 40.005.017, omnidir. microphone

  • 40.006.102,  flush mount speaker 


Wireless DECT headphone

ref.: Jabra Pro 900

wired headphone with Quick Disconnect plug

ref.: Plantronics Encorepro HW540

Induction loop for hearing aids

Ref.: Ampetronic CLD1AC

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