The method applies to the Communication Manager server on which the platform OS, Linux or Windows 2000, uses NTP or SNTP to obtain highly accurate UTC data from an Internet Time Server. The time on the OS clock, which is continuously adjusted to match the polled UTC time also provides the basis for the Communication Manager clock time. This synchronization method is accurate to the fraction of a second.

When a multisite network includes Communication Manager that uses this synchronization method, each Communication Manager server maintains its own clock time. However, as all Communication Manager servers that use this method maintain settings based on the UTC time and are essentially identical, clock synchronization is still achieved.

For requirements and procedures associated with this screen of clock synchronization, see Administering Avaya Aura® Communication Manager.