S. Siedle Telephone and Telegraph Trading Company is one of the leading manufacturers of building communication technology in Germany and Europe. Siedle offers individual, modular system solutions ranging from door and in-house communication to camera control. Siedle places great value on the high quality and superior design of all its products and has received numerous design awards. The family-owned company is rich in tradition and has been producing in Furtwangen in the Black Forest for more than 260 years. Even as far back as the 1990s, Siedle's product development has been aligned to KNX standards.

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