Wired intercom systems connect discussion stations, interpretation units, integration units, and other endpoints to a central control unit through physical cabling, such as Cat 5e or better. Depending on the system design, installers can use daisy-chain or ring topologies, and link multiple control units to expand the connected system.

Plan for Cat 5e or better cable, with connected discussion, integration, and interpretation units arranged in a daisy-chain or ring topology. Reserve space for a 19-inch rack-mountable control unit, and account for its Mic/Line, AUX, interpretation return, and USB recording connections during rack layout.

Wired intercom systems can expand by adding control units, with each unit supporting up to 100 connected discussion, integration, or interpretation stations. Up to three control units can link over Cat 5e or better cable for systems supporting as many as 300 stations, using a daisy-chain or ring topology.

Compare audio processing features such as 24-bit/48 kHz digital processing, automatic gain control, microphone equalization, and feedback suppression, along with recording to a USB storage device in WAV or MP3 formats. For system control, look for Web Remote access, third-party IP control, selectable conference modes, and support for the number of connected discussion, integration, or interpretation units your project requires.