Audio set Siedle Compact in 1+n technology with the functions of calling, speech, and door release. Number of integrated call buttons: 4. Each Compact set can be extended by an additional indoor station per call button and supplemented by a secondary signal device. Scope of delivery: Siedle Compact audio door station (brushed stainless steel), 1 standard in-house telephone, and 3 transformers.

Performance features of the door station CA 812 include an integrated door loudspeaker, adjustable speech volume, and a number of integrated call buttons: 1 (CA 812-1), 2 (CA 812-2), 4 (CA 812-4). Backlit nameplates are exchangeable from the front, and there is a backlit info sign for house numbers, logos, opening hours, etc. The unit is designed for surface mounting with a brushed stainless steel trim.

Features of the indoor station HTS 811-0 include a door call as a 3-tone call and a storey call as a 2-tone call possible in the Compact set with ZERT 811-0. Integrated call silencing is available via volume control, and the call volume is continuously adjustable from outside via volume control up to a maximum of 83 dB(A).