Note• Set the switching hub to Auto Negotiationmode.• If the system is set to 100M Full Duplex, itis necessary to change the system setting.For details, contact your dealer.• Do not connect to a switching hub set to HalfDuplex.• For more details about switching hubs, referto the documentation for the switchinghubs.5. Connect the power cord to the AC adaptor.• Use only the power cord included with the unit.6. Insert the AC adaptor’s DC cord (G) into the DC INterminal on the back of the unit.• Use only the AC adaptor included with the unit.7. Plug in the power cord into the power outlet.• Choose an outlet that is convenient forplugging/unplugging.System Layout ExamplesDisplay and Main Video CameraPlace the display and main video camera at the sameside of the room.Note• If you use speakers, refer to "Amplifier/ActiveSpeaker Connection" (Page 25).Digital Boundary Microphones (KX-VC600only)Up to 4 Digital Boundary Microphones can beconnected in cascade. There are no separate terminalsfor input and output on the Boundary Microphones.Also, an Analogue Boundary Microphone andgeneral-purpose microphones can be usedsimultaneously.Note• Make sure that the microphones are placed atleast 1 m away from the display and speakers.• Do not connect more than 4 Digital BoundaryMicrophones. Doing so will cause all DigitalBoundary Microphones to stop working. If anAnalogue Boundary Microphone is alsoconnected, all audio input from the AnalogueBoundary Microphone will also stop working.• If both of the following conditions are met, theoutput sent to the other party will be stereo;otherwise, monaural:– The bandwidth is higher than approximately1.8 Mbps in a 2-party video conference callwith the HD Visual Communication Unitusing SIP.– The MIC position is set automatically ormanually to collect a sound in stereo(Page 92, Page 92).• If a headset is connected, audio from theheadset microphone is given priority, and audiofrom Digital Boundary Microphones is no longerpicked up.The range of each microphone (the radius of the circlewith a microphone at the centre) varies according to thelevel of surrounding and the number of microphonesbeing used. Place microphones accordingly, referringto the following table.22 User ManualPreparation