Siemens manual AC75 AT Command Set

Models: AC75

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AC75 AT Command Set

3.3 AT^SIND

s

 

“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

 

Confidential / Released

 

 

 

Page 88
Image 88
Siemens manual AC75 AT Command Set