| 10th October - T-Mobile Hungary expands its range of service
by adding a useful feature. Mobile phones will always display
the accurate time, based on a solution that continuously updates
time and the date through the network of the mobile operator.
With mobile phones spreading, less and less people wear wristwatches
as the clock and calendar of cellular telephones is easily
accessible, at any time. In the future, holders of enabled
telephones using the T-Mobile network in Hungary will be guaranteed
to have the accurate time on their displays. State of the
art mobile networks - assuming that customers grant permission
through their mobile terminals - can continuously update both
the phone’s clock and calendar.
T-Mobile’s new network display and accurate time function
(NITZ: Network Identity and Time Zone) enables updating the
date and accurate time, besides displaying the operator name
(T-Mobile H). The service is available across Hungary within
the whole T-Mobile network (be it either GSM or 3G/HSDPA).
The service can be used with NITZ enabled terminals; all the
customer needs to do is activate the automatic date/time update
option. Obviously activation methods vary by terminals.
Reliable background, guaranteed accuracy is inevitable for
synchronisation. For this reason the clocks of all T-Mobile’s
switches are checked automatically every day. Clocks are synchronised
using the most sophisticated tools: 2 PPS based time servers,
their accuracy relative to GPS clock signals - with a variance
of 1 second every 10 thousand years - is considered almost
perfect.
In the course of NITZ updating three components are used
to set the accurate time: firstly Greenwich Mean Time (GMT),
secondly the time zone and finally the appropriate summer/winter
time. The recently introduced service may also be a useful
option to automatically update the clock in the mobile phones
of foreign visitors, who choose the T-Mobile network upon
their arrival in Hungary.
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