Polycom 14117800 manual Configuration of an NTP Server / Client

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Chapter 14 Configuration of an NTP Server / Client

The device can synchronize its internal date/time to an NTP server using the SNTP protocol. Without synchronization to an NTP server the internal date/time is reset to Januar 1st, 1970 0:00 after each restart.

14.1 Configuration

Server

The IP-Adresse of the time server

Interval [min]

The time interval (in minutes) at which the device tries to synchronise with the time server

Timezone

Select the time zone in which the device is located.

String

If the timezone to be used is not one of the predefined timezones, it can be configured with a string in accordance with the IEEE POSIX standard

Last sync

displays the data and time of the last synchronisation.

14.2 Timezone Configuration String

Time services always provide the coordinated world time UTC (Universal Time Coordinated), which corresponds to GMT (Greenwich Mean Time), not however the correct time zone and summer time. It is therefore possible to specify the time difference between the time zone and the world time in the String field. The difference from the time zone GMT+1 (Central European time zone) is 60 minutes. A further 60 minutes has to be added with summer time, adding up to a total difference of 120 minutes. In this case, however, you must adjust the time difference manually when switching from winter to summer time and vice versa.

If a so-called timezone string was entered in the String field, the device can make the switch from summer to winter time automatically. The name of the time zone, the name of the summer time zone, their respective differences in time compared to the UTC and the time switch points are encoded in this field.

There are various formats for the specification of this string. These formats are defined by the IEEE POSIX standard. POSIX timezone strings have the following format (optional parts in square brackets):

StdOffset[Dst[Offset], Date/Time, Date/Time]

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