AIO analog input/output audio

An analog Input Output (AIO) card establishes a bidirectional link to send and receive analog audio between matrix and keypanels. Each audio connection uses a twisted pair of wires, and the electrical signal is electronically balanced. This allows analog audio to be sent over long distance without noise or other audio artifacts. AIO is supported by all RTS keypanels, including legacy panels. AIO can use an RJ12 or an RJ45 connector.