General
Compatibility	Compact door speaker CA 812-., CA/CAU 850-. and CV 850-x-03, -04, CVU 850-

The Siedle microphone CA 812-... is a replacement or additional microphone for integration into existing video door surveillance systems. It is specifically designed for use with Compact door speakers of types CA 812-., CA/CAU 850-. as well as the models CV 850-x-03, -04 and CVU 850-. The microphone is used for capturing voice signals in the area of the door station and enables bidirectional communication between visitor and recipient inside the building. It is part of the low-voltage technology in the field of video door surveillance and is used in installation scenarios where clear and reliable voice transmission is required.

Applications
The microphone is intended for use in residential and commercial buildings, office buildings, and other facilities requiring structured door surveillance. It is installed in conjunction with the mentioned door speakers to supplement or replace the communication function. The use is in indoor areas, where mounting takes place at the door station or in the hallway.

Functions and equipment in detail
The microphone is designed as a replacement part and is responsible for capturing voice signals in the area of the door station. It is designed for use with Compact door speakers CA 812-., CA/CAU 850-. as well as the CV models CV 850-x-03, -04 and CVU 850-. The microphone is not a standalone device, but supplements the function of the door station by enabling voice capture. It is not a standalone communication device, but serves exclusively the input side of voice transmission.

Technology explained simply
The microphone operates as a passive component of the door surveillance system. It captures voice signals in the vicinity of the door station and forwards them to the connected speaker device, which transmits the signals to the recipient side. Signal transmission takes place via the existing wiring of the door speaker, with no specific technical details provided regarding the transmission method (e.g. analog, digital). Mounting takes place at the door station, with the exact mounting method not described.

Compatibility and accessories
The microphone is compatible with Compact door speakers CA 812-., CA/CAU 850-. as well as the models CV 850-x-03, -04 and CVU 850-. It is intended as a replacement part or addition for existing systems. It is not offered as a standalone device, but exclusively in connection with the mentioned speakers.

Mounting and installation
Mounting takes place at the door station in conjunction with the Compact door speaker. It is not a standalone mounting element, but is integrated into the existing system. The exact mounting method, such as fastening materials or connection cables, is not described. Installation is carried out by qualified personnel as part of setting up or maintaining the door surveillance system.

Advantages in operation
The microphone enables clear voice transmission within the door surveillance system. It is a compact and specifically designed replacement part for the mentioned speaker models, ensuring the communication function. Integration takes place without additional technical adjustments, as it is directly connected to the existing connections of the door speakers. It is not a standalone device, but supplements the function of the door station, thereby ensuring continuous communication.