User Guide for Yealink VC110 Video Conferencing Endpoint118If the camera can move and zoom normally, it means that the camera is workingwell.6. Press (Back soft key) to stop camera diagnostics.Network diagnosis:1. Press (Menu soft key) to enter main menu.2. Press or to select the Diagnose menu.3. Press or to scroll to Ping, and then press .4. Enter IP address (for example, the IP address of the remote endpoint)5. Press or to select Start, and then press .6. Press (Back soft key) to return to Diagnose menu.It measures the round-trip time from transmission to reception and reports errorsand packet loss. The results of the test include a statistical summary of the responsepackets received, including the minimum, maximum, and the mean round-triptimes.Trace Route:1. Press (Menu soft key) to enter main menu.2. Press or to select the Diagnose menu.3. Press or to scroll to Trace Route, and then press .4. Enter IP address (for example, the IP address of the remote endpoint)5. Press or to select Start, and then press .6. Press (Back soft key) to return to Diagnose menu.If the test is successful, the VC110 endpoint lists the hops between the endpoint andthe IP address you entered. You can check whether congestion happens via thetime cost between hops.Why can‟t the endpoint place a call? Check the network is available. When making a call using an account, check that the account is registered. Ensure the remote endpoint supports the same call type as the local endpoint. If youwant to place a call using another type, refer to Call Type on page 66.Why can‟t the endpoint receive calls? Check the network is available. When receiving a call using an account, check that the account is registered. Check that DND (Do Not Disturb) mode is deactivated on your endpoint. Refer to Do