Home Company Products Configurator Knowledge References Service Contact Search New Features IP systems Door intercom units Letterboxes Access control Modernization Retrofit panels Modernization as an opportunity Bell for intercom system Bell for video system In-house telephone replacement Compatible telephones Door station replacement Replacement letterbox system From Vario old to Vario new Conservation Barrier-free design Design lines Lettering service Catalogues and brochures Operating instructions Specialist dealers Exchanging the in-house telephone From the fifties to the nineties of the last century, the so-called 6+n system remained the state of the art in door communication technology. Intercom systems of this type were installed in their millions; many have now reached an age when they need to be replaced. App upgrade. For systems made from 1952. Through the new IQ in-house telephone, even older intercom systems can get access to mobile door communication. Millions of these systems are already installed – and now they can all be upgraded to use the app. This connection to cyberspace works no matter how old the system: the Siedle App securely delivers door calls to residents’ mobile end devices The new IQ in-house telephone is available for 1+n and 6+n installation systems. Simple exchange However, in many cases only individual devices are defective or have become unsightly, particularly indoors. For this type of case, Siedle offers a special variant of the current design line, the exchange telephone HTA 811. In terms of its design and function, it corresponds to the standard in-house telephone, but can be integrated seamlessly into an existing 6+n system. Benefit: In the event of a defect, it is not necessary to exchange the entire system, only the affected call station. A difference that can save thousands of Euros - our contribution to investment security. Is it possible to exchange your telephone for the HTA 811? An overview of compatible in-house telephone models: > Compatible 6+n telephones Better living The HTA 811 offers all the benefits of modern design: Contemporary styling, simple installation, easy handling and, importantly too, enormous design versatility. Consequently, an exchange can give rise not only to technical improvement but also bring a welcome facelift. > Design options for in-house telephones © 2020 S. Siedle & Söhne OHG CountryBelgiqueBelgiëDanmarkDeutschlandEspañaFranceItaliaNederlandNorgeÖsterreichPolskaRussiaSchweizSuomiSverigeInternational English Imprint Remarks Dataprotection Information obligation General Terms and Conditions TOP