Specifications

Chapter 3 – Status Control Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 54
nitz Network Identity and Time Zone indication
This indicator shows the time relevant information elements of an MM Information (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 saving 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the returned values may be out of date. Especially the UT value is obsolete because there is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 continuation 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 indicated time zone is valid until a new MMI/GMMI will
trigger another NITZ indication.
simlocal SIM Availability "+CIEV" URC Indicates if the SIM Is Available.
0 SIM removed.
1 SIM inserted.
simstatus SIM Status Indication
The SIM Status Indicator allows the querying of the status of the SIM (Subscriber
Identity Module).
0 SIM card removed.
Note: Another way to verify the SIM card connection is the “^SCKS”
URC enabled with AT^SCKS. For use after restart, its presentation mode can be
stored to the user profile with AT&W.
1 SIM card inserted.
2 SIM PIN1 not required - SIM card unlocked. MC75 automatically registers to the
GSM network without requesting SIM PIN1.
3 SIM PIN1 required - SIM card locked. SIM PIN1 must be entered to enable MC75
to register to the GSM network.
4 Personalization info ready - CHV (Card Holder Verification) data has been
verified (if required).
5 SIM initialization completed - ME has finished reading SIM data.
Note: Another way to notify the user when SIM data are accessible is the "^SSIM
READY" URC enabled with AT^SSET. For use after restart, its presentation
mode can be stored to the user profile with AT&W.
band Currently Selected Frequency Band or Band Combination.
1...15 Identical with <rbc> of AT^SCFG. The value indicates the band(s) currently
available for network selection, depending on the network configuration either a
single band or a dual band combination. T
he URC appears whenever the status
of the currently available band(s) changes, for example after using the AT^SCFG
command to change the “Radio/Band” parameters <rba> or <rbp>. Please see
AT^SCFG for further detail about the feature “Radio/Band” selection.