SIP User's Manual 96 Document #: LTRT-83310
Mediant 600 & Mediant 1000
of reference called the Universal Time Coordinate (UTC). The time offset that the NTP
client uses is configurable using the ini file parameter NTPServerUTCOffset, or via an
SNMP MIB object (refer to the Product Reference Manual).
If required, the clock update is performed by the client as the final step of the update
process. The update is performed in such a way as to be transparent to the end users. For
instance, the response of the server may indicate that the clock is running too fast on the
client. The client slowly robs bits from the clock counter to update the clock to the correct
time. If the clock is running too slow, then in an effort to catch the clock up, bits are added
to the counter, causing the clock to update quicker and catch up to the correct time. The
advantage of this method is that it does not introduce any disparity in the system time that
is noticeable to an end user or that could corrupt call timeouts and timestamps.
The procedure below describes how to configure SNTP using the Web interface.
To configure SNTP using the Web interface:
1. Open the Application Settings page (Configuration tab > System menu >
Application Settings).
2. Configure the NTP parameters:
• 'NTP Server IP Address' (NTPServerIP) - defines the IP address of the NTP
server
• 'NTP UTC Offset' (NTPServerUTCOffset) - defines the time offset in relation to
the UTC. For example, if your region is 2 hours ahead of the UTC, enter "2".
• 'NTP Updated Interval' (NTPUpdateInterval) - defines the period after which the
date and time of the device is updated
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