GTA02 Setting time from phone network using NITZ ?
Adam Ward
caysho at internode.on.net
Sun Sep 23 04:56:10 CEST 2012
On Sat, 22 Sep 2012 03:56:57 PM Timo Juhani Lindfors wrote:
> Adam Ward <caysho at internode.on.net> writes:
> > I know that Telstra in Australia sends both.
>
> Do you know how it sends that? I have been unable to find any kind of
> specification that describes this. I only find references to timezone
> information.
>
When my "normal" phone looses the date/time settings, I get prompted for them
with a date/time dialogue.
After a few seconds this dialogue will disappear and the correct date and time
gets populated.
I am trying to replicate this now, but the phone will not loose the date/time.
I know it happened when I changed networks earlier this month. I went from
Telstra to Optus, and it has happened for me on both networks.
I figure they both implement NITZ in full.
Specification wise, the wikipedia page [1] indicates it is not only timezone
setting information.
I also get a hit on www.etsi.org when searching for "nitz specification" that
references Universal Time [2]. One of the wiki sources indicates the
implementation is optional.
However searching on "nitz universal time specification" gets some clarification
on the issue: not only is it optional, different manufactures have different
interpretations [3].
[1] http://en.wikipedia.org/wiki/NITZ
[2]
http://www.etsi.org/deliver/etsi_ts/122000_122099/122042/08.00.00_60/ts_122042v080000p.pdf
[3] http://www.3gpp.org/ftp/tsg_sa/tsg_sa/TSGS_06/Docs/PDF/sp-99637.pdf
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