FAQ/Problems with Daylight Saving Time / Sommerzeit Probleme

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Answer

While incorporating Daylight Saving Time USA for this year (2007), we discovered that this year our snom phones will change over to European Daylight Saving Time a week late.

You can check this on the phone LOG web page with the messages:

start DST: 04/01/2007 01:00:00 (1175389200) end DST: 10/28/2007 01:00:00 (1193533200)

This years wrong changeover on 1. April takes place obviously one week too late. We will make versions 6.5.8 for snom3xx available for download; these version will fix this problem and also contain the US changes.

Download links

Variations which will fix the problem - without update - manually or through provisioning are also possible.

1) Set the value of "dst" statically to a specific date; however, this will be valid only for this year.

See Daylight Savings Time (DST) format 2):

The value for Provisioning would therefore be, for example:

dst$: 3600 25.03 02:00:00 28.10 04:00:00

DST end is at 4 o'clock which will then actually give you 3 o'clock (this will also be fixed in the new version).

The URLs for the manual fix of the DST on the phone are as follows (each written in one line, respectively):

http://telefon-ip/dummy.htm?settings=save&dst=3600 25.03 02:00:00 28.10 04:00:00

or same URL but with HTML-codes replacing whitespace:

http://telefon-ip/dummy.htm?settings=save&dst=3600%2025.03%2002:00:00%2028.10%2004:00:00

For older phones (not 3xx series): Instead of http://telefon-ip/dummy.htm you can just use http://telefon-ip/settings.htm 2) Set the value of "start dst" not to the "last" but to the "fourth" week; however, this will be valid only for specific years (but year 2007 as well).

See Daylight Savings Time (DST) format 1):

The value for Provisioning would therefore be, for example:

dst$: 3600 03.04.07 02:00:00 10.05.07 04:00:00 

DST end is at 4 o'clock which will then actually give you 3 o'clock (this will also be fixed in the new version).

The URLs for the manual fix of the DST on the phone are as follows (each written in one line, respectively):

http://telefon-ip/dummy.htm?settings=save&dst=3600 03.04.07 02:00:00 10.05.07 04:00:00 

or same URL but with HTML-codes replacing whitespace:

http://telefon-ip/dummy.htm?settings=save&dst=3600%2003.04.07%2002:00:00%2010.05.07%2004:00:00

For older phones (not 3xx series): Instead of http://telefon-ip/dummy.htm you can just use http://telefon-ip/settings.htm

Please note that in either cases every time the "timezone" setting is changed, the settings "dst" and "utc_offset" will also be overwritten. Therefore, provisioning should then be used to set "dst" and "utc_offset" only, but no longer to set "timezone".

We apologize for any inconvenience this will may cause.

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