GSM network time

Hi all!

I have tried looking for the information on the Internet, but could find
nothing... I hope someone can help me out.

I am trying to build a system based on Siemens TC65. It is very important
for the application that runs on it to know the exact time (well, +- 1
minute) at all times - even after power off.

Now I know my nokia GSM has an option to get the time from network so it can
be done - but how do I tell TC65 it should do it every once in a while?
Does it syncronize the time automatically?

AT command set documentation says:
---
<time> will be reset to its factory default if power is totally
disconnected. In this case, the clock starts with
<time>= "02/01/01,00:00:00" upon next power-up.
Each time TC65 is restarted it takes 2s to re-initialize the RTC and to
update the current time. Therefore, it is
recommended to wait 2s before using the commands AT+CCLK and AT+CALA (for
example 2s after
^SYSSTART has been output).
---

Does that mean that the module updates the time from the network 2s after
power-up?

Should I use AT+CCLK to set the time to the one I get from my server on the
Internet (GPRS)?

Another thing: is the time on RTC always UTC? I will be using J2ME
Date.getTime() to get the number of milliseconds from epoch... Will the
time be exact or should I worry about it?

I just need the accurate UTC time. :)

Any help would be appreciated.

Kind regards,

Anze

.