User Guide for the VC800 Video Conferencing System605. Press or to adjust the Display(90%-100%) slider to change the zoom level of thedisplay device.6. Press or to select Save and then press to accept the change.7. Press to return to the idle screen.Call ProtocolThe VC800/VC500 video conferencing system supports SIP and H.323 call protocols. You canconfigure which protocol is to be used when the system is making calls. When the Auto callprotocol is used, the system preferentially uses the H.323 protocol to place calls. If there is noavailable H.323 account on the system, the system will switch to the SIP protocol. You can alsospecify the desired protocol for the system to place calls via the remote control or web userinterface.NoteTo configure the call protocol via the remote control:1. Select (More menu).2. Press or to scroll to Setting and then press to expand the menu.3. Press or to scroll to Call Features and then press to enter submenu.4. Press or to scroll to Call Protocol and then press .Before configuring call protocol, ensure the remote system supports the call protocol too. Formore information, contact your system administrator.
