Matrix SIMADO GFXD1111S, System Manual

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86 Matrix SIMADO GFXD1111S V3 System Manual
Mobile Network Selection
At each power-ON, the SIM inserted in GFXD1111S will start searching for the network and will register
automatically with the available network.
However, when GFXD1111S is installed in a remote hilly place or at a place where it is surrounded by multi-storied
buildings then in such situation it might not register with the desirable network. Also when GFXD1111S is located in
an area where more than one Network Operator is available, it is possible that the SIM Card may register with
another available network i.e. foreign network and thus result in 'Roaming' charges. To avoid this, you must select
manual mode for network selection.
Before you select manual mode for network selection, you must program the Network Operator Priority Table. This
table requires you to program the Network Operator Codes (MCC-MNC)
2
in order of priority for a Mobile Port. So,
whenever you register with the network manually, the Mobile Port (SIM) will send a query to the available GSM
Network Operators, who in turn will respond to the query with their Network Operator Codes. The Mobile Port will
then match the Network Operator Codes it receives with those in the priority table you have programmed, and
select the Network Operator that matches in order of priority.
If the SIM Card fails to register, it will restart the process of network selection on the expiry of the Network
Registration Retry Timer. If no match is found, the Mobile Port (SIM) will not get registered with any of the available
network operators and thus no calls will be processed on this port.
But in case user prefers to remain registered with any network operator and wants to make and receive calls at any
cost then you must select automatic mode for network selection. In automatic mode, network is selected as per the
field strength whereas in manual mode, network is selected as per the priority network codes programmed in the
priority table.
Also program frequency band supported by the network operator's in your country. The Frequency Band supported
by the GSM/CDMA networks varies across countries. Therefore select the Frequency Band used by the GSM/
CDMA Service Provider(s) in the country where GFXD1111S is installed. For instance, set 900 + 1800 frequency
band for the countries that support 900 or 1800 GSM frequency band.
• Select 'Automatic' mode for network selection when CDMA module is installed in GFXD1111S as
CDMA network does not support 'Manual' mode for network selection.
• For CDMA, network operator code is programmed as '00000' (default) for priority 1 to 9. Because of
these default settings, the CDMA port will get registered even if manual mode is selected for network
selection.
How to Program?
SE shall program following three parameters for the network selection by SIM/RUIM installed in SIMADO
GFXD1111S.
Use following command to program Network Selection Mode for Mobile Port:
331-Mode-#*
2. The Network Operator Code comprises of the Mobile Country Code (MCC) appended by the Mobile Network Code (MNC). The MCC
is usually a 3-digit code that identifies a country. For example the MCC assigned to India is 404 and it applies to all network operators
in the country. MCC for other countries are: USA-310; Canada-302; Australia: 505; Italy: 222.
The MNC is usually a 2/3-digit code. The MCC-MNC combination uniquely identifies the home network of the mobile terminal or the
mobile user. For example, Airtel, a GSM network operator in India, has different MNC assigned to its networks in various states. The
MNC for Airtel in the state of Maharashtra is 90, while the same for the state of Gujarat is 98.