Overview7Port Name Description③ USBInserts a USB flash drive to one of the two USB port forstoring screenshots, recording videos or capturing packets.Note: If two USB flash drives are connected, only the latterone can be identified.④ PC Connects to a PC for sharing documents or videos during acall.⑤ CameraConnects to a camera.You can also connect two VCC20 cameras to the VC120Codec using the VC Dual-camera Box VCB20.⑥ Display1Connects to a display device for displaying video images.When connecting to only one display device, Display1 porton the VC120 Codec is the only available port.⑦ Display2 Connects to secondary display device for displaying videoimages.⑧ Line In Connects to an audio input device using an audio cable(3.5mm).⑨ Line Out Connects to an audio output device using an audio cable(3.5mm).⑩ Audio In Connects to the video conferencing phone or the VCM30video conferencing microphone array.⑪ Internet Connects to the network device.⑫ DC19V Connects to the power source via a power adapter.⑬ Reset Key Resets the system to factory defaults.⑭ Security SlotAllows you to connect a universal security cable to VC120Codec, so you can lock it down. The system cannot beremoved when locked.VCC18/VCC20 HD CameraThe VCC18 HD camera supports 18x optical zoom, white balance and automatic gain. TheVCC20 HD camera supports 12x optical zoom, white balance and automatic gain. You can placethe camera on the table or mount it on a wall.The following takes VCC20 HD camera as an example to introduce camera performance.