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
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