To get in touch with your local Ring-Master distributor, please contact the STENTOFON Sales departement.

In 1916 Gustav A. Ring Sr. founded the company Gustav A. Ring Systemmaskiner A/S. Following the Liberation of Norway in 1945, Ring Sr. and his son were released from captivity and Gustav A. Ring Jr. set his sights on the USA and the Edison Electric Company. He returned home with the knowledge and skills that provided the basis for remarkable developments in the field of internal communications, or ‘calling’ as the Rings termed it.

During the following years, they focused on product development and brought about an intercom revolution by means of acquisitions and their own patenting. Ring-Master became their trade mark.

Triphone, the world’s first intercom to combine loud and soft-speaking functions with privacy in one and the same apparatus, caused a furore in the market — not least because of the unit’s compact design and great flexibility. But this was only the beginning of what was to become a series of milestones.

Ring-Master systems are now to be found throughout the world, installed in New York’s Rockefeller Centre, Empire State Building, Agfa Belgium, Norges Bank as well as in a large number of other prestigious buildings, companies, factories and constructions world wide.