Avaya IP Office 4602, Руководство администратора

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Issue 1.2 January 2005 45
Appendix C: Time Zone Determination
Introduction
This appendix describes how to determine the TimeZone parameter setting.
Time Zone Setting
Time zones are based on the distance from Greenwich Mean Time (GMT), which is zero. Time
zones east of Greenwich, UK, go from +1 to +12. Time zones west of Greenwich, UK go from
-1 to -12.
The 4602 SIP Telephone uses the TimeZone parameter to set the Date and Time display. The
TimeZone parameter can be up to two ASCII characters. Because the phone does not accept a
plus (+) or negative (-) sign, you have to use a formula to obtain a numerical time zone value to
use.
Time Zone Calculation:
1. Use the Time Zone Chart to determine the time zone in which the phone is located.
2. If the time zone is -1 to -12 (i.e., West of Greenwich, UK), eliminate the minus sign and use
the number as the TimeZone parameter value. For example, a phone site located in the
Eastern United States has an actual time zone of -5. Therefore the TimeZone parameter
value for that site is 5.
3. If the time zone is +1 to +12 (i.e., East of Greenwich, UK), subtract that number from 25 and
use the result as the TimeZone parameter value. For example, a phone site located in
Japan has an actual time zone of +9. Therefore, the TimeZone parameter value for that site
is 25 minus 9, or 16.
See Table 3 for an easy to use reference to TimeZone parameter values.