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Operational Features
5-20 41-001160-03, Rev 00, Releaes 2.4
IP Phone Administrator Guide
Time Zone & DST
There are two ways you can set the time zone on the IP Phones.
First Method - You can set a time zone using the Time Zone option in the IP
Phone UI or you can use the “time zone name” parameter in the configuration
files. Both methods allow you to enter a value from the Time Zone table. The list
of time zone names is provided in the table in Appendix A, the section, “Time
Zone Name/Time Zone Code Table” on page A-47. The following is an example:
time zone name: US-Eastern
Second Method - You can use the “time zone name” parameter in the
configuration files, and specify a value of “custom” for this parameter. This
method allows you to customize the time zone for your area using additional
configuration parameters. The following is an example using relative time for
EST:
time zone name: custom
The following table identifies the additional parameters you can enter in the
configuration files if you want to customize your time zone.
Custom Configuration
File Parameter Description Example
time zone minutes The number of minutes the time zone is
offset from UTC (Coordinated Universal
Time). This can be positive (West of the
Prime Meridian) or negative (East of the
Prim Meridian). Eastern Standard Time
(EST) has a value of 300.
custom time zone minutes: 300
dst minutes The number of minutes to add during
Daylight Saving Time. Valid values are a
positive integer between 0 to 60.
dst minutes: 60
dst [start|end] relative date Specifies how to interpret the start and
end day, month, and week parameters -
absolute (0) or relative (1).
dst [start|end] relative date: 1
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