Four‑port zone expansion for the Multi‑Zone Controller (IP7‑MZC). Cascade up to twelve four‑port zone expansions on a single Multi‑Zone Controller for a total of forty‑eight zones of full‑duplex audio. Any combination of zones can be activated via software control.

The IP7‑MZC Multi‑Zone IP Audio Controller provides the ability to create and communicate with up to forty‑eight zones of microphones and speakers (full‑duplex) through a single IP audio connection. The base IP7‑MZC has the ability to set up one microphone/speaker connection. The IP7‑ZX4L 4‑Zone Expansion Board for the MZC enables the addition of four zones per board with microphones and speakers, and up to twelve IP7‑ZX4L boards can be daisy‑chained for a total of 48 zones from a single IP7‑MZC connection.