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Design and Developed by SMA


The VSP system is independent of the installations power supply and fulfils the demands for emergency communication between vital positions. The system has a versatile range of light but robust and corrosion-resistant stations for all environments. 20-Way (M) system consisting of up to 20 main stations with selector switch for selective calling between all connected stations.


  • 20 extension system
  • 2 positions group selector switch
  • 10 extension line selector switch
  • LED call indication in front
  • Flush mounted Wall mounting with corresponding metal cabinet type MBOKS
  • Desk mounting with corresponding wooden cabinet type VSPK
  • Suitable for installation in accommodation and control rooms



Through the use of dynamic microphone- and receiver-inserts, speech and hearing levels are 4 times louder as compared to the conventional Sound Powered Telephones.