www.acti.comInstallation Guide31How to Connect Audio Devices (Optional)Depending on your surveillance needs, you may connect audio input or output device, such as anactive microphone or speaker, to your camera. In this case, you need to connect the audioinput/output device to the supplied audio terminal block.To connect audio input / output devices, map the pins to one of the pin combinations below:Device Pin Mapping InstructionsAudio Output1 GND Connect the wires of the audio output device to GND(Pin 1) and AUDIO.OUT (Pin 2).2 DI1Audio Input3 GND Connect the wires of the audio input device to GND(Pin 3) and AUDIO.IN (Pin 4).4 DI2Press and hold the orange tab as you insert the wire through the pin slot, then release the orangetab to secure the wire.NOTE: For more information about AUDIO in connections, please refer to the Knowledge Basearticle How to Use Audio-in of ACTi Cameras, downloadable from the link below(http://www.acti.com/support/KnowledgeBase/outside/detail.asp?KB_ID=KB20100114003).4321