Siemens manual AC75 AT Command Set

AC75 AT Command Set

3.3 AT^SIND

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	“eons“	Enhanced Operator Name String (EONS) Indication
		The Enhanced Operator Name String indicator feature allows the AC75 to out-
		put various operator names for different PLMN identities via URC. It also allows
		the output of a different operator name based on a subset of the registered net-
		work by using a range of Location Area Codes (LACs) or a single LAC.
		The presentation of the "eons" indicator is determined by network activity. For
		example, the indicator appears every time a location update occurs or a NITZ
		information is sent, no matter whether or not the status of the EONS informa-
		tion has changed. This means that the same EONS information may be
		reported several times.
		The EONS tables are stored in the SIM card and will be read at power-up.
		Following are the SIM Elementary Files that are affected by the introduction of
		EONS feature in the SIM card:
		EFSST (SIM Service Table) - describes which features are active.
		EFOPL (Operator PLMN List) - contains the PLMN identification and location ID
		together with the index of the corresponding PNN record
		EFPNN (PLMN Network Name) - contains the full and short form version of the
		network name for the registered PLMN
		If the Operator Name Source is CPHS Operator Name String long and short
		form, refer to <indValue>, the following two SIM Elementary Files will be
		used:
		EFONString (Operator Name String) - contains the name of the PLMN operator
		who issued the SIM.
		EFOPShort (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
		<nitzUT>, <nitzTZ>, <nitzDST> 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
AC75_ATC_V01.002		Page 88 of 569	10/30/06
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