User Guide for the VC800 Video Conferencing System186You can also enter other IP address (for example, the IP address of the remote system) inthe Trace Route field.If the test is successful, the VC800 system lists the hops between the system and the IPaddress you entered. You can check whether congestion happens via the time costbetween hops.6. Press to return to Diagnose menu.General IssuesWhy can’t the system place a call? Check the network is available. When making a call using an account, check that the account is registered. Ensure the remote system supports the same call protocol as the local system. If you wantto place a call using another protocol, refer to Call Protocol on page 84.Why can’t the system 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 system. Refer to Do NotDisturb (DND) on page 109.Why doesn’t the display device display the time and date correctly?Check whether you have configured the system to obtain the time and date from the SNTPserver automatically. If the system fails to connect to the SNTP server, contact your systemadministrator for more information. You can also configure the time and date manually. For
