Version 6.6 267 October 2014
Installation & Operation Manual 30. Time and Date Configuration
Notes:
• If you configure external NTP servers on both the Media Gateway and the EMS
server, then you should configure the same NTP servers on both the EMS server
and the Media Gateway.
• If you configure external NTP servers on the Media Gateway, it is not
recommended to use the EMS server as the NTP server clock reference
source. Therefore, you should disable the use of the EMS server as an NTP
server reference source; in the NTP Servers table, change the Administrative
State of the EMS server entry (EMS server's IP address) to Locked (for more
information, see Section 'NTP Synchronization and Status' on page 269).
30.3.1 External NTP Servers Setup - Option 1
In the Setup Option 1 below, the EMS server uses two Stratum-2 NTP servers as its
NTP clock, and consequently the Media Gateway obtains this NTP clock reference
source (when the EMS server is configured as both an NTP server and NTP client).
Note: For information on configuring external NTP servers on the EMS server, refer
to the EMS Server IOM Manual.
Figure
30-2: External NTP Server Setup - Option 1
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