Replacement of a Siedle in-house telephone
From the 50s to the 90s of the last century, the so-called 6+n system was the state of the art in door communication technology. Intercoms of this type have been installed millions of times; many have now reached operating hours that require replacement. This can be done without any complex installation: the Siedle replacement telephone HTA 811 fits seamlessly into an existing system of the 6+n system. With an IQ in-house telephone and the Siedle app, the older systems even have access to mobile door communication.
Modernisation made easy
Cover up old drill holes or dirt – Siedle’s retrofit panels mean there’s no need for any plastering or painting. They ensure tidy, precision modernisation, both inside and out! Take a look at our video and see just how quick and easy it is.
The HTA 811 replacement telephone replaces these old Siedle devices
The HTA 811 replacement telephone replaces an impressive eight generations of older Siedle in-house telephones installed using the 6+n system. This overview shows which ones these are.
The LN 7145, LN 7150 AND S 7150 models with the legendary Schrillo bell are available with three, five or ten call buttons.
The pebble grey housing of the HT 111 features two buttons for door call, door release and light as well as a two-tone chime.
The HT 311 with its characteristic buttons and list of names under the receiver is a classic from the 1970s.
The HT 351 comes in light and dark brown, beige or orange. And with two or four signal lights.
The HT 411 has a no-tangle cord and two buttons with key symbol and a red dot for door call or light.
The HT 511 typically features a large door release or nine buttons and a field with three function elements.
The HT 611 comes in black or white. The door release and function buttons can be pressed when the receiver is down.
The HTA 711 has a plug-in cord, light button and door release button as well as one tone each for door and storey call.
The replacement telephone HTA 811 is our all-rounder for replacing and expanding existing door intercoms.