Siedle has always made it a principle to invest in innovative key technologies ahead of their time. What distinguishes Siedle is its capacity for pioneering achievement and its willingness to break new ground – today just as much as two and a half centuries ago.
In 1935, Siedle launches its "Portavox", the first door loudspeaker. Together with an in-house telephone long since part of the company's product range, this creates a totally new concept: The door communication system. With this move, the company itself created the market on which was to concentrate its efforts in the future. Since the Portavox, Siedle has dedicated its entire inventive wealth to further perfecting its intercom system.
Seventy years after it was invented, the door intercom system has achieved an amazing stage of refinement. Today, it forms the basis for a system which can do far more than communicate with visitors and release doors. The target Siedle has been striving to achieve has been the same since Portavox: Creating communication systems for every field of application which comply with the most stringent demands.
1935: Portavox, the first door loudspeaker
1971: HT 111, the first in-house telephone with integrated gong
1972: Video-Portavox, the first video door surveillance system to be launched on the German market
1975: HT 311, the first system telephone to feature different call button modules
1981: Siedle Vario 511, the first modular door loudspeaker system
1986: Siedle Multi, high-performance system for complex applications
1998: Siedle Vario 611, the highly distinctive modular system
2000: Siedle Steel, high-end individually produced systems
2006: In-house telephones with individualized design
2008/2010: Siedle Select, the complete system for the one-family home
2010: Siedle Scope, the world's first mobile video call station
2012: Siedle Access, the server-based IP system for building communication