Siemens Brodersen MC55 AT - Manual (Page 68)

MC55_ATC_V04.00 Page 68 of 475 3/17/06
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EF
ONString
(Operator Name String) - contains the name of the PLMN operator
who issued the SIM.
EF
OPShort
(Operator Name Short form) - contains a short form of the name of
the PLMN operator who issued the SIM.
"nitz" Network Identity and Time Zone indication
This indicator shows the time relevant information elements of an MM Informa-
tion (MMI) or GMM Information (GMMI) message received from the network
(see GSM 24.008, ch. 9.2.15a and 9.4.19). The network usually sends a NITZ
indicator when the mobile attaches to the network, when it enters a location
area with different time zone or when a daylight change occurs.
A NITZ indicator may consist of the following parameters: Universal Time (UT),
local Time Zone (TZ), Daylight Saving Time (DST). All information elements of
MMI/GMMI are optional and therefore, the presentation of the parameters
, , varies with the network. For example, the
network may send all three parameters UT, TZ, DST, or only UT and TZ or only
TZ.
UT is indicated in usual date/time format and represents the current world time
(GMT) at the moment when sent.
TZ is given as a positive (east) or negative (west) offset from UT in units of 15
minutes.
DST shows the number of hours added to the local TZ because of daylight sav-
ing time (summertime) adjustment. Usually DST is 1 hour but it can be also 2
hours in certain locations.
Example for time and time zone with DST:
+CIEV: nitz,"04/07/23,13:39:20",-28,1
In this example TZ is -28, showing a time offset of -7 hours (west) to Universal
Time/GMT (which never changes for DST). DST is 1 which indicates that one
hour was added to TZ because of Daylight Saving Time. If a network does not
send the DST parameter the TZ value would be -32 (8 hours west) as would
be done in winter:
+CIEV: nitz,"04/11/23,13:39:20",-32
Please be aware that despite the last NITZ value can be looked up again via
"AT^SIND=nitz,2" the returned values may be out of date. Especially the UT
value is obsolete because there is no internal NITZ clock and therefore no con-
tinuation of UT.
NITZ values are lost when the module detaches from network. Also when a
manual network selection fails and the module automatically falls back to the
previous network the NITZ values cannot be recalled. Nevertheless an indi-
cated time zone is valid until a new MMI/GMMI will trigger another NITZ indi-
cation.
Integer type value in the range stated above for the corresponding .
Notes specific to the EONS feature:
If the indicator is "eons", the is a type associated to the operator name according to GSM 22.101
[23] . This type depends on the source of the operator name.
Priority of types associated to the operator names is defined as follows (the type listed first has the highest pri-
ority). If a type cannot be indicated the next one will be used.
(num)
0 Not registered.
1 EF-OPL and EF-PNN (alphanumeric format, can contain up to 24 characters.)
2 Operator Name String in long and short format according to Common PCN
Handset Specification (CPHS) [24] (alphanumeric format, can contain up to 16
characters).
3 Name information received by the NITZ service long and short form (alphanu-
meric format, can contain up to 16 characters). The short form will be displayed
only if EF
OPShort
from CPHS is available.