Specifications

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TD 92326GB

2009-03-10 / Ver. E

Installation and Operation Manual

VoIP Gateway

158

differences in time compared to the UTC and the time switch points are encoded in this

value.

Since the values are somewhat complicated, the configuration provides help editing to

make correct entries for Central Europe and Great Britain:

• If you select the value “Central Europe” in the “Load TZ-String for” field, then the TZ

string will be entered in the “String” field for the Central European time zone.

• If you select the value “UK” from the “Timezone” field, then the TZ string for the

British time zone will be entered into the “String” field.

• If you select the value “Other” from the “Timezone” field then the “TZstring” will be

deleted and you will be able to enter any value of your choice. There are various

formats that are defined by the IEEE POSIX standard.

The VoIP Gateway can access the “POSIX time zone” using “DHCP”. For further

information on the “DHCP-Client” and “POSIX TZ”.

Note: You can find further information about this standard at the web address http:/ /

standards.ieee.org/catalog/olis/posix.html.

For most practical purposes however, the following description is sufficient “Timezone”

have the following form (optional parts in square brackets):

• Std = Time zone (for example EST for Eastern Standard Time).

• Offset = time difference between the timezone and the UTC (Universal Time

Coordinator).

• Dst = summertime zone (for example EDT for Eastern Daylight Time).

• Second Offset = time difference between the summer time and the UTC.

• Date/ Time, Date/ Time = beginning and end of summertime

- date format = Mm.n.d (d day of n week in the m month)

- time format = hh:mm:ss in 24-hour format.

Note that a week always starts on a Sunday and the number for Sunday is 0.

Note: You can find time zone information on www.worldtimezone.com.

Examples:

North Carolina is located in the Eastern Time Zone. Eastern Standard Time (EST) is 5

hours behind UTC (StdOffset = EST5), the Eastern Daylight Time (EDT) is 4 hours

behind UTC (DstOffset = EDT4). Summertime for the year 2006 begins at two

o'clock, on a Sunday, the first week in April (M4.1.0/2). The summertime ends at

two o'clock, on a Sunday, the last week in October (M10.5.0/2).

Note that the last week in a month is represented by the number 5.

Greenwich time with no time diff (StdOffset = GMT0). British summertime - 1 hour

(DstOffset = BST-1), Summertime begins at one o'clock, on a Sunday, the fifth week

in March (M3.5.0/1). The summertime ends at two o'clock, on a Sunday, the fifth

week in October (M10.5.0/2).

The Central European time zone, which applies to Germany, is specified as follows: