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TC63 AT Command Set

3.3 AT^SIND

TC63_ATC_V00.490 Page 74 of 501 5/24/05

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“eons“ Enhanced Operator Name String (EONS) Indication

The Enhanced Operator Name String indicator feature allows the TC63 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:

SST

(SIM Service Table) - describes which features are active.

OPL

(Operator PLMN List) - contains the PLMN identification and location ID

together with the index of the corresponding PNN record

PNN

(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:

ONString

(Operator Name String) - contains the name of the PLMN operator

who issued the SIM.

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

<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

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