The document is a user manual for the PS 230 dual channel speaker station. It contains 10 sections that describe: 1) general information about the speaker station and its full duplex communication abilities. 2) unpacking instructions. 3) installation instructions including cabling guidelines. 4) an overview of the front panel controls and connectors. 5) side panel connectors. 6) internal controls. 7) additional cabling guidelines. 8) an explanation of the party line communication concept. 9) guarantee information. 10) technical specifications of the speaker station including power consumption and microphone specifications.